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Location:
perth
Registered:
January 2003
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loss of boost after installation of intercooler
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Tue, 12 October 2004 10:52
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hi guys
my 3t finally got a front mount cooler installed...
just that it feels like my car has dropped boost....was at 13psi and now it stuggling to get to 10 psi... dont see any leaks????????
nik
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I supported Toymods
Location:
Perth, WA
Registered:
May 2003
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Re: loss of boost after installation of intercooler
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Tue, 12 October 2004 11:00
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intercooler pressure drop
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I supported Toymods
Location:
Sydney, NSW
Registered:
February 2004
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Re: loss of boost after installation of intercooler
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Tue, 12 October 2004 11:07
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i agree, pressure drop
m8 of mine suffered the same.. but didnt realise till 6 months later when we commented on it 
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I supported Toymods
Location:
melbourne
Registered:
June 2002
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Re: loss of boost after installation of intercooler
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Tue, 12 October 2004 11:16
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where is your boost gauge reading from, before intercooler or after? not that it should make much difference.
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Registered:
August 2002
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Re: loss of boost after installation of intercooler
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Tue, 12 October 2004 11:58
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your car will be making more power on less boost.....
PSI is not the be all and end all
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Location:
south east - melbourne
Registered:
March 2004
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Re: loss of boost after installation of intercooler
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Tue, 12 October 2004 22:52
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would the pressure drop be more if the intercooler was too big ., maybe u friend got a too big an intercooler
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Location:
South Australia
Registered:
July 2002
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 03:34
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I think if you take a look at the ideal gas formulae (which are actually kinda stupid because no gas follows those formulae word for word) you'll realise that you are still getting the same amount of air into the engine, and it's running cooler as well, which means you can get better overall performance.
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Location:
Campbelltown
Registered:
November 2003
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 04:19
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yes because the air is no colder it takes up less space thus exrting less pressure
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Location:
Perth
Registered:
October 2003
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 04:26
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If the waste gate actuator is getting it's pressure signal from the turbo side of the intercooler, shouldnt you be able to get a bit more boost be simply plumbing the actuator line into the manifold?
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Location:
NSW Engadine
Registered:
June 2003
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 05:11
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In any application... you want the most power from the lowest pressure possible...
EG making 250hp off 10psi is far better than 250hp off 16psi... it's much more reliable to run lower boost...
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 05:20
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| Skip wrote on Wed, 13 October 2004 14:26 |
If the waste gate actuator is getting it's pressure signal from the turbo side of the intercooler, shouldnt you be able to get a bit more boost be simply plumbing the actuator line into the manifold?
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bloody good idea  . not being a turbo owner, hadn't 'thunk' this..
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Location:
Adelaide, SA
Registered:
May 2002
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 05:23
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Skip, it's a good idea, i've seen it done before It also keeps the wastegate(s) closed for longer, thus bringing boost on quicker 
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Location:
south east - melbourne
Registered:
March 2004
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 05:51
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wouldnt that idea result in massive boost spikes tough , cause of the long hose needed to be run from the manifold to the turbo wastegates
how much in boost increase are we expecting
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Location:
Adelaide, SA
Registered:
May 2002
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 06:00
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Not much of an increase, the increase will depend mostly on the pressure loss from the intercooler... it all evens out in the end.
Just get a boost gauge and keep an eye on the pressure  I don't see it spiking much/at all.
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Location:
south east - melbourne
Registered:
March 2004
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 06:07
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what hapens to the turbo ends then( where the pressure hose starts from) will runnin a hose from one opening to the other seal them
might try it when i get some time the 1g-gte also has a spare nipple to connect a vaccum source , lolllllll that helps
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Location:
Adelaide, SA
Registered:
May 2002
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 06:14
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Just get a small length of hose, even the standard bit of hose coming from the turbos, and plug it up with something. Easy.
You'll want to get the new source of pressure from that L shaped pipe that bolts up to the throttle body. On the bend, there is a small hose which has a plug in it. You could find a suitable brass connector, knock out the plug, tap a thread and then attach a hose to this. Use a Y splitter and run one hose to each wastegate.
Of course, you could also adapt this idea to run higher boost pressure, as well as controlling how fast the boost comes on.
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Registered:
May 2002
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Location:
Perth
Registered:
October 2003
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 08:23
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| indian wrote on Wed, 13 October 2004 14:07 |
what hapens to the turbo ends then( where the pressure hose starts from) will runnin a hose from one opening to the other seal them
might try it when i get some time the 1g-gte also has a spare nipple to connect a vaccum source , lolllllll that helps
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Why would you bother? just buy some bungs to put over the spigots from your local autoparts store!
ke382TG: Did you mean you ran the actuator line from the outlet of your intercooler?
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Location:
Perth
Registered:
October 2003
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 08:25
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BTW nik3t, what intercooler are you running, 3psi drop at only around 13psi sounds excessive?
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Location:
Brisbane
Registered:
May 2002
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 10:42
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Sounds like a Mk3 Supra intercooler to me!
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Location:
Carlingford, Sydney
Registered:
May 2002
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 11:01
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remove the rag from the intercooler?
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Registered:
May 2002
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Location:
Sydney
Registered:
May 2002
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Re: loss of boost after installation of intercooler
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Wed, 13 October 2004 23:32
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Umm.. dont plumb it into the manifold. plub it as close to the throttle body as possible but not after it.
other wise. you snap the throttle closed. manifold goes to vacum and closes wastegates. if you have been on boost your turbos are already spinning very quickly. then with the sudne closure of the wastegate you will result in a spike in boost pressure in the inlet piping, not the manifold as it's closed off and in a vacum.
ofcourse coupled with a blow off valve this may result in more PSSSCCHH for your $.
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Registered:
May 2002
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Location:
Syndey
Registered:
December 2002
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Re: loss of boost after installation of intercooler
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Thu, 14 October 2004 01:00
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| Bugman wrote on Thu, 14 October 2004 09:32 |
Umm.. dont plumb it into the manifold. plub it as close to the throttle body as possible but not after it.
other wise. you snap the throttle closed. manifold goes to vacum and closes wastegates. if you have been on boost your turbos are already spinning very quickly. then with the sudne closure of the wastegate you will result in a spike in boost pressure in the inlet piping, not the manifold as it's closed off and in a vacum.
ofcourse coupled with a blow off valve this may result in more PSSSCCHH for your $.
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do you realise what you just said makes no sence at all???
when you close the throttle exhasut gas stops, when the exhuast gas stops the turbo isnt being driven any more weather the wastegate is open or the wastegate is closed.
hook up the waste gate where you can have the shortest lines possible,
im guessing the cooler is either a supra style one or one of these cheap shitty hybrids ebay jobs, if it is a hybrid check for air leaks as it is quite common for them to leak...
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Location:
south east - melbourne
Registered:
March 2004
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Re: loss of boost after installation of intercooler
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Thu, 14 October 2004 01:29
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god damn so the 1g-gte stock intercooler is no go zone u guys reckon
and yes the longer the pressure line the bigger the spike as i mentioned before so best bet is to leave it factory cause its a small piece of hose in most cases and doesnt spike at all
im thibking of getting an intercooler soon
what do u guys reckon of this cooler for a gz20 soarer
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&a mp;category=32624&item=2494104827&rd=1
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Registered:
May 2002
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Re: loss of boost after installation of intercooler
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Thu, 14 October 2004 01:39
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| Quote: |
do you realise what you just said makes no sence at all???
when you close the throttle exhasut gas stops, when the exhuast gas stops the turbo isnt being driven any more weather the wastegate is open or the wastegate is closed.
hook up the waste gate where you can have the shortest lines possible,
im guessing the cooler is either a supra style one or one of these cheap shitty hybrids ebay jobs, if it is a hybrid check for air leaks as it is quite common for them to leak...
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Someones got there thinking cap on!! Hehehe I am too tired to think about things in such a logical process at the moment  (yes i know it is the middle of the day but I get up early).
The reason that I tried running the line pre and post throttle body back in the day was because I thought that the vacuum acting on the actuator may have been contributing to the delay thus causing the spike (it was only a thought though that going from vac to boost versus atmospheric pressure to boost was causing an ever so slight delay that contributed to boost spikes, but as i pointed out above fitting just pre or post throttle made SFA difference). In the end as said above it all came down the the length of the line, short is best.
I am going to shut my trap now I need a sleep.
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Location:
Syndey
Registered:
December 2002
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Re: loss of boost after installation of intercooler
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Thu, 14 October 2004 01:50
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short and hard lines, like good quality vacuum hose (not expansive silicon hose as it swells), braided hoses or even solid pipe!, this will increase the accuracy of a bleed valve as well and ensuring the same boost each time,
on external gates you often have to run larger lines as well,
Sleep is a good thing
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Location:
perth
Registered:
January 2003
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Re: loss of boost after installation of intercooler
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Thu, 14 October 2004 11:57
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Thanks for feedback
im running a ford cosworth bar and plate cooler... not big at all...
ive noticed last night my temps were around 28 on full boost...a drop of 50 degrees b4 cooler...
running better but im sure its dropped boost... mates tellin me to put a boost controller and wind it up...sounds good but i mite take it to the dyno guy and see wtf is happenin...
it never ends!!!!!
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