 stock 3sgte boost psi ????? |
 Dec 30, 2006 - 3:30 PM
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Enthusiast  Joined Mar 4, '06 From Ohio Currently Offline Reputation: 10 (100%)  |
I just got my swap done and drove it today. Its only boosting to 6-7 max psi. I think the mechanical boost gauge is ok because its vacuum is reading 20 at idle. When I pinch off the vacuum hose on the side of the turbo the boost goes through the roof until fuel cut! Is this normal for a stock 1991 st185 with top mount intercooler to only get 6-7 psi? I thought it should be about 10-12 psi. Or is that psi only possible with modifications to the wastegate? Thanks for the help!
-toyotacrazy |
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Jan 2, 2007 - 6:16 AM
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Enthusiast Joined Mar 4, '06 From Ohio Currently Offline Reputation: 10 (100%) |
I understand how the tmic is not the best setup. I am working on a fmic now. But could it really be holding back that much boost? I mean...theres st185 celicas running around with tmic pushing 16 psi of boost. I know they have the factory hood scoop though. Ill try the fmic and see what happens. Thanks.
-toyotacrazy |
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Jan 2, 2007 - 8:44 AM
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 Enthusiast Joined Aug 28, '04 From FLA USA Currently Offline Reputation: 4 (100%) |
QUOTE(toyotacrazy @ Jan 2, 2007 - 6:16 AM) [snapback]514563[/snapback] I understand how the tmic is not the best setup. I am working on a fmic now. But could it really be holding back that much boost? I mean...theres st185 celicas running around with tmic pushing 16 psi of boost. I know they have the factory hood scoop though. Ill try the fmic and see what happens. Thanks. -toyotacrazy A/A TMIC will not function without hood scoop. You need airflow too cool down the IC. That is why they call it " ait-to-air intercooler" With out scoop to feed air to it, I would call it "interheater"  Because of this setup, you are pumping hot air into the engine. And that is the reason why the ECU won't let you boost more. The ECU does this via the T-VSV (Turbo Pressure Vacuum Switching Valve). Basically it is the factory boost controller. It is just an electronically controlled bleed valve. It regulates boost by bleeding air out of the wastegate actuator to allows more boost. The ECU switches it on and off base on feedbacks from many sensors. (temperature, knock, etc..) This post has been edited by Gary: Jan 2, 2007 - 8:53 AM -------------------- _Gary
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Posts in this topic
toyotacrazy stock 3sgte boost psi ????? Dec 30, 2006 - 3:30 PM
playr158 6-7 psi should be running off the wastegate only..... Dec 30, 2006 - 4:12 PM x_itchy_b_x your in safe mode. something that tells the ecu th... Dec 30, 2006 - 4:36 PM malecrod I had the same low boost mode when I got my swap d... Dec 31, 2006 - 8:27 PM lagos you cant use the top mount IC with our cars. insta... Dec 31, 2006 - 8:30 PM toyotacrazy Im running a completely stock except the flex pipe... Dec 31, 2006 - 10:11 PM jcbass7 im having the same issues with my swap, but once m... Jan 1, 2007 - 11:09 PM Gary Most likely, it is the IC heat soaking.
The charge... Jan 2, 2007 - 1:09 AM lagos QUOTE(Gary @ Jan 2, 2007 - 1:09 AM) ... Jan 2, 2007 - 2:23 AM
toyotacrazy QUOTE(Gary @ Jan 2, 2007 - 8:44 AM) ... Jan 2, 2007 - 12:30 PM
zCelicaDude QUOTE(Gary @ Jan 2, 2007 - 1:44 PM) ... Jan 2, 2007 - 2:48 PM toyotacrazy thank you! That is very helpful. Jan 2, 2007 - 9:19 AM lagos yes... st205 has tsvs. you can use it to monitor y... Jan 2, 2007 - 3:02 PM toyotacrazy QUOTE(lagos @ Jan 2, 2007 - 3:02 PM)... Jan 2, 2007 - 6:01 PM 2slow2nervous wat is the max psi u guys would reccomend pumping ... Jan 2, 2007 - 6:35 PM |
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