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Location:
Newcastle
Registered:
June 2004
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BOV's
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Thu, 30 December 2004 06:34
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Hey im looking at gettin a BOV for my car. The car is fully comprehensively insured so i dont want to void insurance over a BOV. Is it possible to have BOV's that r street legal? What is the difference between sequential and sonic? Any information would be good thanx 
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Location:
Sydney
Registered:
February 2003
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Re: BOV's
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Thu, 30 December 2004 08:29
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if you want legal you'll probably need a plumback bov not at venting to atmosphere type
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Location:
Newcastle
Registered:
July 2003
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Re: BOV's
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Thu, 30 December 2004 09:13
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if you want it legal you will DEFINANTLY need it plumbed back  no two ways about it. beauty of the plumb back unit is that it wont be as obnoxious and loud as an atmo.
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Location:
Newcastle
Registered:
June 2004
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Re: BOV's
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Mon, 03 January 2005 12:20
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Cool thanx. Is there much performance increase if any? or just for better turbo health? do the plumback BOV's need any extra piping? Thanx
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Location:
brisbane
Registered:
October 2004
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Re: BOV's
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Tue, 04 January 2005 07:06
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*edit*
well at da moment only plumb back is legal and is fitted
to some cars at factory.
bov's reduce backpressure against the turbo when it is spooled up , backpressure causes it to slow down and bad for the fins.
backpressure increases turbo lag, because the turbo has to spool
up again.
if you are gunning the car and changing gears >
pedal down
engine powers up turbo
turbo spools
change gear, pedal up >>>> turbo still spooled
engine not using as much turbo flow
pressure builds up in front of turbo
pressure slows down turbo spinning (backpressure)
also atmo and plumb back bovs :
orignal bov was a plumb back to elimanate back pressure
but it returned the air to the turbo to be compressed again,
now when air goes through a turbo it becomes heated and if
it returns again it is heated twice wich is not desirable, so
atmo bovs were invented so heated air could escape and the air
going to the engine would only be heated once.
boost, bovs, bleed valves, intercoolers seem simple but can be complicated, id recommend some research. like simple bleed
valves cause spiking, there are 2 stage boost controllers etc
ask if u wanna know much else and check out other info
cheers
[Updated on: Wed, 05 January 2005 02:28]
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Tue, 04 January 2005 07:08
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| styler wrote on Tue, 04 January 2005 17:06 |
bov's reduce backpressure against the turbo when it is spooled up , backpressure causes it to slow down and bad for the fins.
if you are gunning the car and changing gears >
pedal down
turbo spools
change gear, pedal up >>>> turbo still spooled
engine not using turbo
pressure builds up in front of turbo
pressure slows down turbo spinning (backpressure)
pedal down
turbo spools... etc etc
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This is not a very good description on how and why a BOV works 
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Location:
Newcastle
Registered:
June 2004
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Re: BOV's
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Tue, 04 January 2005 09:17
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| Cool1 wrote on Tue, 04 January 2005 18:08 |
| styler wrote on Tue, 04 January 2005 17:06 |
bov's reduce backpressure against the turbo when it is spooled up , backpressure causes it to slow down and bad for the fins.
if you are gunning the car and changing gears >
pedal down
turbo spools
change gear, pedal up >>>> turbo still spooled
engine not using turbo
pressure builds up in front of turbo
pressure slows down turbo spinning (backpressure)
pedal down
turbo spools... etc etc
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This is not a very good description on how and why a BOV works
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care to explain it better for me
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Location:
adelaide
Registered:
April 2003
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Re: BOV's
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Tue, 04 January 2005 09:24
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BOV = performance fallacy
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Tue, 04 January 2005 09:30
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Pedal to the floor opens throttle body allowing air/fuel mixture into engine.
Engine loads up causing turbo to spool and make boost.
Boost travels through throttle body into the engine.
When pedal comes off floor, the throttle body closes.
Compressed air from turbo has no where to go so the turbo stops spinning freely.
With a BOV in place the compressed air vents out of the system when the throttle body is closed allowing the turbo to keep spinning a little more freely.
The BOV only helps prevent a tiny bit of "lag". Maybe a little more than a tiny bit on high boosted engines.
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Location:
Wollongong
Registered:
November 2004
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Re: BOV's
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Tue, 04 January 2005 09:35
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| styler wrote on Tue, 04 January 2005 18:06 |
well at da moment only plumb back is legal and is fitted
to some cars at factory.
bov's reduce backpressure against the turbo when it is spooled up , backpressure causes it to slow down and bad for the fins.
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Bad for the fins? What you been smoking?
You can run a Turbo engine with NO air filter, have rocks go in, belt the fins, and have no damage to the turbo...
The compressor surge does not hurt them, although it does induce lag when shifting...
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Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Tue, 04 January 2005 10:19
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| Kyosho wrote on Tue, 04 January 2005 19:35 |
You can run a Turbo engine with NO air filter, have rocks go in, belt the fins, and have no damage to the turbo...
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WTF have YOU been smoking??
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Location:
Wollongong
Registered:
November 2004
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Re: BOV's
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Tue, 04 January 2005 10:25
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| Norbie wrote on Tue, 04 January 2005 21:19 |
| Kyosho wrote on Tue, 04 January 2005 19:35 |
You can run a Turbo engine with NO air filter, have rocks go in, belt the fins, and have no damage to the turbo...
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WTF have YOU been smoking??
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People claim that the boost "spiking" causes shaft play, yet hard things like rocks, although they do mark the fins, don't do anything to shaft play at all, many older cars also had no BOV from factory, and MANY MANY cars, run no BOV with high boost...
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Location:
adelaide
Registered:
April 2003
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Re: BOV's
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Tue, 04 January 2005 10:30
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people will argue that 'cars come from the factory with a BOV like 200sx, rx7 etc'
fact : they are there to REDUCE NOISE when fitted at the factory
nothing to do with turbo wear/damage.
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Location:
Sydney
Registered:
November 2003
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Location:
Montrose, VIC
Registered:
May 2002
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Re: BOV's
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Tue, 04 January 2005 10:36
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I tend to agree with the limited few (including Simon at Nizpro) that such valves are really only to kill the gobble gobble noises. The noisy ones, obviously, serve NO useful purpose, apart from shouting 'WANKER!' constantly. Then again, a lot of people still believe that turbo timers also actually save their turbo, rather than provide a convenient hotwiring point...
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Location:
Wollongong
Registered:
November 2004
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Re: BOV's
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Tue, 04 January 2005 10:41
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| 86twinky wrote on Tue, 04 January 2005 21:31 |
Kyosho:
Care to explain where the extra pressure from the compressed air goes when the throttle shuts?
Where do you get this info about rocks and "other hard things" not doing damage?
Boost spiking and compressor surge are two totally different things.
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The compressed air when the throttle is closed, with NO bov builds within the air intake (After the turbo, before the TB) until the point that the pressure in that confined area, is great enough as to a) Start to force back through the fins while they are still spinning forwards making that sound you get when you blow through a fan the wrong way, and then b) Eventually stopping the turbo so that there is no longer much pressure left...
I understand the boost spiking and compressor surge are totally different things, but if you stick a boost guage between the turbo and TB and have no BOV, you will witness the boost spike quite high... That was why I had it in there in my previous post, probably not the best way to explain things as it does get confusing...
I was explaining with rocks not doing damage, in regards to causing shaft play, sure it marks the fins etc, but if a hard thing can smack the fin, cause it stop in an instant, and cause no shaft play, then why will air, stopping the compressor over say half a second, cause shaft play?
I agree the rock causes "damage" but not in the sense of shaft play etc...
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Location:
Wollongong
Registered:
November 2004
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Re: BOV's
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Tue, 04 January 2005 10:45
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| mrshin wrote on Tue, 04 January 2005 21:36 |
I tend to agree with the limited few (including Simon at Nizpro) that such valves are really only to kill the gobble gobble noises. The noisy ones, obviously, serve NO useful purpose, apart from shouting 'WANKER!' constantly. Then again, a lot of people still believe that turbo timers also actually save their turbo, rather than provide a convenient hotwiring point...
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I say if you can't sit in the car for 30 seconds to a minute, your a lazy person...
Or just let it cool off boost for last minute or two of driving...
Only affect the Turbo timer has, is allows turbine to spool down to idle spool speed before loosing all its "push"
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Location:
Montrose, VIC
Registered:
May 2002
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Re: BOV's
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Tue, 04 January 2005 12:03
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Driving the car gently for the last little bit is a lot more effective than sitting there idling, building up heat under the bonnet, etc. anyway...
"Only affect the Turbo timer has, is allows turbine to spool down to idle spool speed before loosing all its "push"" - what you mean by that?
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Location:
sunny coast, qld
Registered:
October 2002
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Re: BOV's
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Tue, 04 January 2005 13:25
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wouldn't his GT4 have a BOV already? if so, no point in getting another one unless it is leaking.
Spend your money on something useful is my opinion
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Location:
Sydney
Registered:
February 2003
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Re: BOV's
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Tue, 04 January 2005 14:10
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yeh that was my thinking.
are there any modern turbo cars without bovs?
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Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Tue, 04 January 2005 14:49
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| Kyosho wrote on Tue, 04 January 2005 20:25 |
| Norbie wrote on Tue, 04 January 2005 21:19 |
WTF have YOU been smoking??
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People claim that the boost "spiking" causes shaft play, yet hard things like rocks, although they do mark the fins, don't do anything to shaft play at all, many older cars also had no BOV from factory, and MANY MANY cars, run no BOV with high boost...
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So you're telling me a rock striking a delicate aluminium blade spinning at 100,000 rpm will not cause any damage apart from "marking" the fins?
And even if that was true (which it quite clearly isn't), what on God's green earth does that have to do with BOV's?
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Location:
Sydney
Registered:
November 2003
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Location:
Central Coast
Registered:
June 2002
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Re: BOV's
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Tue, 04 January 2005 22:39
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Chris Davey
Registered:
October 2002 Re: BOV's Wed, 05 January 2005 00:25
wouldn't his GT4 have a BOV already? if so, no point in getting another one unless it is leaking.
i know my st165 gt4 engine didnt have one. im not sure that the 185s did either, i know the 205s do.
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Location:
Newcastle
Registered:
June 2004
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Re: BOV's
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Tue, 04 January 2005 22:45
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Hey im not sure if mine does have a BOV installed factory, maybe the group A ones had it installed from factory but not the standard ones? where would i be lookin? There isn't one atached to the TMIC ?
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Location:
brisbane
Registered:
October 2004
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Location:
Melb, Victoria
Registered:
April 2004
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Re: BOV's
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Wed, 05 January 2005 05:57
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st165 and st185 didn't have factory bov/bpv fitted.
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Location:
Gold Coast
Registered:
May 2002
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Re: BOV's
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Wed, 05 January 2005 06:26
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| Kyosho wrote on Tue, 04 January 2005 20:35 |
| styler wrote on Tue, 04 January 2005 18:06 |
well at da moment only plumb back is legal and is fitted
to some cars at factory.
bov's reduce backpressure against the turbo when it is spooled up , backpressure causes it to slow down and bad for the fins.
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Bad for the fins? What you been smoking?
You can run a Turbo engine with NO air filter, have rocks go in, belt the fins, and have no damage to the turbo...
The compressor surge does not hurt them, although it does induce lag when shifting...
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run away!
Dust caused this one
A pebble
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Location:
Newcastle
Registered:
June 2004
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Re: BOV's
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Wed, 05 January 2005 06:29
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Might be diggin a hole there Kyoshi thanx for info guys im gonna ring my issurance company and see what they say... hopefully they r nice
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Location:
Adelaide
Registered:
June 2003
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Re: BOV's
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Wed, 05 January 2005 07:16
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if you going to have a bov have one that plumbs back. cos in SA ones that vent to atmosphere will get you a defect note, not sure in other states though. the 7mgte has a factory plumb back so im going to stick with it. That is my 2 cents
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Location:
New Zealand
Registered:
December 2004
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Re: BOV's
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Wed, 05 January 2005 08:57
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correct me if im wrong.....
but i was lead 2 believe that a turbo timer allowed the turbines 2 spool down 2 idle speed rpms and also allows the oil in the motor and turbo 2 cool down and cool the turbo (slighty).....
ur out boosting pull up in ur mates driveway and flick off ya car and head inside, the turbo turbines spool down pretty fast with no exaust gas pushing them but ur turbos now sitting ther hot az baking in its own juices cause the oil flow has stopped and dribbled away 2 the engine also water coold turbos no water flow...
correct me if im wrong (probwerly am) bt thats what i heard and id like 2 know what they actually do
cheers 
go the gt4!
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Location:
Inside a giant turbo (syd...
Registered:
June 2002
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Re: BOV's
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Wed, 05 January 2005 09:47
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thats how turbos timers 'work' but what may i ask is cooling the oil and water to cool the turbo while the car is stationary? nothing......... so, if you havent been boosting or only a little bit and you use your full sick turbo timer for 30seconds to 1min then your turbo ends up hotter than it was if you just shut your car off... Turbo timers are a waste of time!
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Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Wed, 05 January 2005 10:06
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Firstly, a turbo will "spool down" pretty much instantly when you take your foot off the throttle, so a turbo timer has nothing to do with that. Idling down a turbo engine is beneficial in some circumstances, ie if you shut the engine off when the turbo is glowing orange you're going to cause long-term damage! Of course this will very rarely (if ever) happen on a street car, which is why I believe turbo timers are a total wank.
FWIW all turbocharged piston-engined aircraft have a minimum idle-down period after landing (usually around 5 minutes), so the issue is real. Of course aircraft engines experience vastly different load cycling to automotive engines, so this doesn't mean the same thing applies to a car!
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Location:
Alice Springs
Registered:
February 2004
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Re: BOV's
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Wed, 05 January 2005 10:10
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I would be a bit concerned if the oil and water in your motor gets hotter while the motor is idling.Time to add a thermo fan.It does not hurt to allow a motor ( turbo or otherwise )to idle for a short time to allow temperature of different components to equilerbrate especially if it has been working hard.
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Location:
Wollongong
Registered:
November 2004
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Re: BOV's
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Wed, 05 January 2005 10:42
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| Norbie wrote on Wed, 05 January 2005 21:06 |
Firstly, a turbo will "spool down" pretty much instantly when you take your foot off the throttle, so a turbo timer has nothing to do with that. Idling down a turbo engine is beneficial in some circumstances, ie if you shut the engine off when the turbo is glowing orange you're going to cause long-term damage! Of course this will very rarely (if ever) happen on a street car, which is why I believe turbo timers are a total wank.
FWIW all turbocharged piston-engined aircraft have a minimum idle-down period after landing (usually around 5 minutes), so the issue is real. Of course aircraft engines experience vastly different load cycling to automotive engines, so this doesn't mean the same thing applies to a car!
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I'd have to disagree with the "instant" spool down... We could still here a cars turbo we were working on for around 30-45seconds afterwards spinning down... It was a T28, and the engine was not being boosted, we had it sitting there idling whilst working a tune on the idle... Yet we shut the car down, and you could here the turbo spooling down (Whining), but yes they do start to spool down when you first take your foot off, but they don't instantly "stop" when you turn the car off...
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Location:
Inside a giant turbo (syd...
Registered:
June 2002
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Re: BOV's
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Wed, 05 January 2005 11:14
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oh ok, so your motor doesnt heat up with no airflow over your radiator? right....... a thermo will keep it down sure, so leave your car idling long enough for the thermos to kick is is stupid, just drive your car normally for 2-3mins before you reach your destination. Turn it off, and its cooler than leaving it idling.
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Location:
adelaide
Registered:
April 2003
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Re: BOV's
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Wed, 05 January 2005 11:41
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interesting pics of broken comp wheels
i do however note that nobody seems to be able to post any evidence of turbo units that have failed becaose there was no BOV
you know why this is? because BOVs dont do anything except reduce noise on standard cars.
everyone says 'cheap insurance for your turbo' but nobody can provide evidence of damage that is caused by not having one of these valves. not even the companies that make the valves can provide this evidence.
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Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Wed, 05 January 2005 12:49
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| Kyosho wrote on Wed, 05 January 2005 20:42 |
I'd have to disagree with the "instant" spool down... We could still here a cars turbo we were working on for around 30-45seconds afterwards spinning down...
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The turbo may be spinning while the engine is of boost or even idling, but it will be a few rpm, not tens of thousands of rpm. In other words, nothing to worry about in terms of bearing damage.
Give it up dude, you're clutching at straws now and it's not making you look any smarter.
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Location:
Brisbane
Registered:
February 2003
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Re: BOV's
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Wed, 05 January 2005 13:06
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| Spanktown wrote on Wed, 05 January 2005 19:47 |
thats how turbos timers 'work' but what may i ask is cooling the oil and water to cool the turbo while the car is stationary? nothing.!
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huh?
the engine is running when the turbo timer is engaged and hence circulating water from the radiator thru the engine and the turbine housing (and possibly donut oil cooler if fitted) taking the heat way from these warm things and loosing it via the radiator.
Many turbo cars also have oil coolers attached to the engine's oil circulation system and it would (during the run down of a turbo timer) do the same thing as the cooling system.
So, it's radiator (and oil cooler) are cooling down the oil and water which are cooling down the turbine bearing housing.
well, actually it starts with the drawing of air over the radiator's fins ... but let's not get too technical.
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I supported Toymods
Location:
fairfield NSW
Registered:
January 2003
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Re: BOV's
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Wed, 05 January 2005 21:08
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this is an interesting read. i am still contemplating whether i should install my TT and BOV...
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Location:
New Zealand
Registered:
December 2004
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Re: BOV's
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Wed, 05 January 2005 21:22
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thats what i meant tho just 2 allow the parts 2 cool down a bit b4 u turn everything off
i think every1 agrees 2 disagree because sum of us see these parts as (riceboy) parts and dont do shit 2 ur car but others look at the little bit they do do reducing lag (bov's) etc even if its only fractional and letting ur turbo cool down a bit (t-timers)and decide 2 use them anyway
but cheers anyway ive learnd sum good stuff from this
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I supported Toymods
Location:
fairfield NSW
Registered:
January 2003
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Re: BOV's
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Wed, 05 January 2005 22:22
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would it be safe to say that if your turbo car goes on track days alot and you're on the throttle/clutch alot, it would be wise to invest in a BOV? just for the sake of the longevity of the turbo?
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Location:
Newcastle
Registered:
June 2004
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Re: BOV's
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Wed, 05 January 2005 22:56
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From reading it seems that if u run high enough boost, and are driving in boost enough the the reduction in lag is worth getting a BOV...
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Location:
Sydney
Registered:
November 2003
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Re: BOV's
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Wed, 05 January 2005 23:41
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| WantaTurbo wrote on Thu, 06 January 2005 09:56 |
From reading it seems that if u run high enough boost, and are driving in boost enough the the reduction in lag is worth getting a BOV...
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Lag is a minor factor, turbo longevity would be more so a reason (for those who believe in the "mystical" turbo saving powers of a bov that is)..
If you want one, get it.. just stay away from vent to air ones.
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Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Thu, 06 January 2005 11:50
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If you're running a decent amount of boost and a big FMIC (like I am), a BOV is a good way to ensure your inlet hoses stay attached. Without a BOV the pressure spikes can be quite large on full-power gear changes, and this can be enough to pop the hoses off or even split them in extreme circumstances. IMO this is a large part of the reason manufacturers install BOV's in the first place.
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Location:
adelaide
Registered:
April 2003
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Re: BOV's
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Thu, 06 January 2005 22:05
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bzzzzzzzzzzzzzzt
wrong answer, the factory installs them to quieten down compressor surge
remove a factory bov and see how things sound different on gear changes
your average mum and dad new car buyer would certainly be put off by the noise
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Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Fri, 07 January 2005 01:10
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Well you seem very sure of yourself! Is this confirmed fact or merely your assumption?
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Location:
adelaide
Registered:
April 2003
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I supported Toymods
Location:
fairfield NSW
Registered:
January 2003
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Re: BOV's
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Fri, 07 January 2005 03:43
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interesting.
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Location:
Sydney
Registered:
November 2003
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Re: BOV's
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Fri, 07 January 2005 03:46
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| pro_ke |
nobody can produce this evidence from a reliable source (ie not your mates brothers cousin who works for sikD1workshop) because THERE IS NO EVIDENCE!
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It's all a government conspiracy...
I'd say it would be hard to provide examples of this as a lot of it may be interpreted and normal wear and tear on the turbo.
How about instead of insisting that everyone prove not running a BOV can damage the turbo, you prove that damage caused to turbo's isn't related to not running a BOV.
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Location:
adelaide
Registered:
April 2003
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Re: BOV's
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Fri, 07 January 2005 03:56
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look, i am not going to sit here and diagnose broken turbos
here are some FACTS i will leave you with
did the turbo f1 cars of the late 80s use a BOV - no
did the le mans 24hr endurance cars of the same era use BOVs - no
did the 700hp + rally cars from this era use BOVs - no
the people behind the above were at the pinnacle of these motorsport engineering fields for about 10 years and did not once bother with BOVs.
one other fact i will leave you with. in 1991 the caltex sierra of colin bond raced bathurst, it DID have a BOV. it did not finish the race due to a broken turbo shaft.
it is up to each individual to decide if they think these 'noise makers' are necessary but wouldnt it be great if they could determine their own requirements by FACT and not by 'add on sales' and 'marketing'?
the ball is in your court
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Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Fri, 07 January 2005 05:16
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| pro_ke wrote on Fri, 07 January 2005 13:37 |
it is a confirmed fact
here is one example from the rx7 turbo (ie series 5) factory service manual
(snip)
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That's nice, but it has nothing to do with what I was talking about.
| Quote: |
...this (pressure spike) can be enough to pop the hoses off or even split them in extreme circumstances. IMO this is a large part of the reason manufacturers install BOV's in the first place.
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Your response was "wrong answer", but you have yet to provide any reason why it might be wrong?
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Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Fri, 07 January 2005 05:21
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| pro_ke wrote on Fri, 07 January 2005 13:56 |
here are some FACTS i will leave you with
did the turbo f1 cars of the late 80s use a BOV - no
did the le mans 24hr endurance cars of the same era use BOVs - no
did the 700hp + rally cars from this era use BOVs - no
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Were any of these turbos required to last more than a race or two before being rebuilt or replaced - no.
So did you have any FACTS relevant to this discussion? 
PS settle down, it sounds like you're about to burst a blood vessel there. We're talking about blowoff valves FFS!
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Location:
adelaide
Registered:
April 2003
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Re: BOV's
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Fri, 07 January 2005 06:36
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| Norbie wrote on Thu, 06 January 2005 22:50 |
IMO this is a large part of the reason manufacturers install BOV's in the first place.
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- the point is its got nothing to do with hose pressure, it is to do with noise reduction
- are you saying a car that has to run flat out for 24 hours under race conditions is not durable? i dare say a turbo that is put onto a car for a 24 hour endurance race (and to some extent even the f1 cars, can you say 3 bar boost?) will have to do a lot more work than any person on this forum's personal turbo. and the race car does not need a BOV.
- i would like to see a world where people are not getting ripped off and brainwashed into thinking they need to spend $300 on something which does nothing
just like peter brock's fuel polariser
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Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Fri, 07 January 2005 06:41
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| pro_ke wrote on Fri, 07 January 2005 16:36 |
- the point is its got nothing to do with hose pressure, it is to do with noise reduction
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And MY point is it's more likely to do with both (and probably other factors also). I was asking for proof that it's definitely noise reduction and nothing else, but clearly you have none - as I suspected.
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Location:
adelaide
Registered:
April 2003
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Re: BOV's
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Fri, 07 January 2005 06:57
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but there are no other reasons, and i have never seen or heard of a hose blowing off on closed throttle (blow off hose? )
sounds to me like you are a bov owner searching for justification of your ownership.
its ok there are groups that can help
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Fri, 07 January 2005 07:03
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This thread is starting to become gay.
I want to know what happens when your running 20+ psi and then the throttle body closes when you dont have a bov?? The pressure has to go somewhere, and theres no way in hell its all going to escape back through the turbo thats spinning like mad without causing damage
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Fri, 07 January 2005 07:06
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I also want to know about these F1 cars that you need to completely come off the throttle to change gears?
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Location:
adelaide
Registered:
April 2003
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Re: BOV's
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Fri, 07 January 2005 07:06
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ask every F1 head engineer from 1987!
ps the turbo units used on these cars are very similar to the units you see in road cars today, f1 technology does actually filter into road cars from time to time
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Toymods Vice President
Location:
Sydney
Registered:
May 2002
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Re: BOV's
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Fri, 07 January 2005 07:09
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| pro_ke wrote on Fri, 07 January 2005 17:57 |
but there are no other reasons, and i have never seen or heard of a hose blowing off on closed throttle (blow off hose? )
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Do you have any actual hands on experience with turbo cars?
It's not exactly uncommon for hoses to pop off under closed throttle for a gear change.
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: BOV's
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Fri, 07 January 2005 07:11
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| pro_ke wrote on Fri, 07 January 2005 17:06 |
ask every F1 head engineer from 1987!
ps the turbo units used on these cars are very similar to the units you see in road cars today, f1 technology does actually filter into road cars from time to time
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I think you lost a few to many brain cells back in 1987  If the throttle body comes to a complete close in an F1 car during a shift, something has broken.
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