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Location:
Fraser Coast, QLD
Registered:
June 2005
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3sgte boost
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Mon, 19 September 2005 08:58
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hey
i was wondering how much boost a 3sgte (st165 engine) should hav at the compressor. is it 7 psi?
thanks ty
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Location:
Newcastle, NSW
Registered:
May 2004
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Re: 3sgte boost
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Mon, 19 September 2005 09:01
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at the compressor im not sure..but i know 5psi in 1st and second and 7 in 3rd and above at the tb..i guess it would be pretty similar at the compressor due to the lack of intake piping and such
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Location:
Perth W.A
Registered:
September 2004
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Re: 3sgte boost
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Mon, 19 September 2005 09:08
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i read 9psi is what they should have. CT20?
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Location:
Coffs Harbour
Registered:
October 2004
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Re: 3sgte boost
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Mon, 19 September 2005 09:57
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no ct26, and yeh wat DV said sounds bout right for stock motor
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Location:
Darwin
Registered:
March 2003
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Re: 3sgte boost
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Mon, 19 September 2005 22:41
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i got 6Psi in 1st and 2nd and then 8Psi in 3rd til i hit bout 4000rpm then it drops back to 5psi
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Location:
Newcastle
Registered:
June 2004
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Re: 3sgte boost
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Tue, 20 September 2005 00:16
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| crazedrt104 wrote on Tue, 20 September 2005 08:41 |
i got 6Psi in 1st and 2nd and then 8Psi in 3rd til i hit bout 4000rpm then it drops back to 5psi
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Back to 5! 
Time to get some mods dude! You running stock exhaust and air intake?
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Location:
Newcastle, NSW
Registered:
May 2004
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Re: 3sgte boost
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Tue, 20 September 2005 01:31
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| crazedrt104 wrote on Tue, 20 September 2005 08:41 |
i got 6Psi in 1st and 2nd and then 8Psi in 3rd til i hit bout 4000rpm then it drops back to 5psi
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mine used to do that sometimes when it was stock..i just put it down to the age of the car and components that the tvsv wasnt working completely like it should...disable the tvsv, slap a boost controller on that sucker and get her up to 12 psi  , problem solved...grin increased 
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Location:
Colac, Victoria
Registered:
May 2002
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Re: 3sgte boost
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Tue, 20 September 2005 08:14
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| -=DV=- wrote on Tue, 20 September 2005 11:31 |
| crazedrt104 wrote on Tue, 20 September 2005 08:41 |
i got 6Psi in 1st and 2nd and then 8Psi in 3rd til i hit bout 4000rpm then it drops back to 5psi
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mine used to do that sometimes when it was stock..i just put it down to the age of the car and components that the tvsv wasnt working completely like it should...disable the tvsv, slap a boost controller on that sucker and get her up to 12 psi , problem solved...grin increased
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Drive for a while - blow your headgasket , cause the HG wont stand up to higher boost for many miles , rebuild , or replace with st205 motor - win
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I supported Toymods
Location:
Sydney
Registered:
May 2002
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Re: 3sgte boost
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Tue, 20 September 2005 08:16
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for a gen 1 or 2?
i've running .50BAR - .70BAR on my gen 2 ST185 is that fine?
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Location:
Fraser Coast, QLD
Registered:
June 2005
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Re: 3sgte boost
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Tue, 20 September 2005 09:28
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its a gen 1 3sgte. It is around 6.5psi in every gear and holds right up to redline. I ran the piping to the wastegate actuator where i put in a T piece.
When i change gears the boost spikes up to 9 or 10 just for an instant. is this normal wit the gen 1?
thanks
ty
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Location:
Newcastle, NSW
Registered:
May 2004
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Re: 3sgte boost
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Tue, 20 September 2005 11:14
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| Classique71 wrote on Tue, 20 September 2005 18:14 |
| -=DV=- wrote on Tue, 20 September 2005 11:31 |
| crazedrt104 wrote on Tue, 20 September 2005 08:41 |
i got 6Psi in 1st and 2nd and then 8Psi in 3rd til i hit bout 4000rpm then it drops back to 5psi
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mine used to do that sometimes when it was stock..i just put it down to the age of the car and components that the tvsv wasnt working completely like it should...disable the tvsv, slap a boost controller on that sucker and get her up to 12 psi , problem solved...grin increased
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Drive for a while - blow your headgasket , cause the HG wont stand up to higher boost for many miles , rebuild , or replace with st205 motor - win
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20,000+ k's and its running better now than it was the day i got it, i think its very safe unless u go mental, grab an fcd and start boosting it past what toyota have decided as safe
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Location:
Darwin
Registered:
March 2003
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Re: 3sgte boost
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Tue, 20 September 2005 22:24
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the car is stock 140k
i thought the psi drop in third form 8 to 5 was caused by the down pipe being to restrictive?? thoughts??
i think it might be time for an aussie and a 3" system
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: 3sgte boost
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Tue, 20 September 2005 22:50
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| crazedrt104 wrote on Wed, 21 September 2005 06:24 |
i thought the psi drop in third form 8 to 5 was caused by the down pipe being to restrictive?? thoughts??
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Could be, if it's anything like the 1GGTE one I pulled off the other day, it's ugggly.
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Location:
Newcastle, NSW
Registered:
May 2004
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Re: 3sgte boost
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Wed, 21 September 2005 00:22
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| crazedrt104 wrote on Wed, 21 September 2005 08:24 |
the car is stock 140k
i thought the psi drop in third form 8 to 5 was caused by the down pipe being to restrictive?? thoughts??
i think it might be time for an aussie and a 3" system
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i dont think it would be due to restrictions man, uness ur exhaust has been crushed under there somewhere, these things were designed to operate around 7-8 psi in the higher gears so i doubt toyota would have made them too restrictive for that....can u feel a power drop when u notice the boost drops?
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Location:
brisbane
Registered:
December 2004
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Re: 3sgte boost
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Wed, 21 September 2005 05:31
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lol boost = power less boost = less power
silly question  .....
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Location:
Newcastle, NSW
Registered:
May 2004
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Re: 3sgte boost
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Wed, 21 September 2005 06:32
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| berad wrote on Wed, 21 September 2005 15:31 |
lol boost = power less boost = less power
silly question .....
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i was asking as it could be a problem with ur guage, or where u have run the boost line...ie billmchenry sounds like what he is reading is the wastegate closing and pressure quickly jumping just before it opens again? considering his guage is running from the wastegate actuator line...i dunno im no expert, ive got alot of learning to do...but im having a go 
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Location:
Fraser Coast, QLD
Registered:
June 2005
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Re: 3sgte boost
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Wed, 21 September 2005 09:39
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Does the gen 1 3sgte hav a plumb back bov?
I will put the low boost down 2 the stock st162 exhaust that is current on it. Dont worry it will soon b thrown away when my 3" dump is made and i put 2.5" system on.
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Location:
Newcastle, NSW
Registered:
May 2004
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Re: 3sgte boost
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Wed, 21 September 2005 10:29
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nah it doesnt have a bov of any description man  ...at the moment ive got an atmospheric BOV sitting in my passenger footwell i want to convert to plumback soon, but im having trouble finding the size hose id need to plumb it back..and as all things it frequently gets put on hold to repair gtfour stuff lol
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Location:
Darwin
Registered:
March 2003
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Re: 3sgte boost
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Wed, 21 September 2005 22:29
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[/quote]
i was asking as it could be a problem with ur guage, or where u have run the boost line...
[/quote]
The guage is roughly 2 months old, autometer, and its connected to the top left of the throttle body
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Location:
Newcastle, NSW
Registered:
May 2004
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Re: 3sgte boost
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Wed, 21 September 2005 23:49
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ahhh k...could just be the tvsv system failing then? disable it, grab a cheap boost controller and push 8 psi...if it still cant hold the boost..atleast then ya know its not ya tvsv...and ya didnt spend hundreds on an exhaust system to find out
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