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2nd Generation Specific 1986-1992 Discussion

Turbo Isn't Boosting Properly

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Old 07-29-2003, 08:45 AM
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the stock turbo isn't efficient at anything above 11 psi i find.



even with top mount, the boost would spike to 11 psi and it would kinda hold at 11 till around 5000 rpm when it starts to trail off and i end up at around 9 to 9.5 psi at redline.
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Old 07-29-2003, 09:34 AM
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Originally Posted by Cheers!' date='Jul 29 2003, 09:45 AM
the stock turbo isn't efficient at anything above 11 psi i find.



even with top mount, the boost would spike to 11 psi and it would kinda hold at 11 till around 5000 rpm when it starts to trail off and i end up at around 9 to 9.5 psi at redline.
judge ito said if you crank it past 10 psi they crap out very quickly..... he used to go thru quite a few when his rx truck had stock turbo on it lol
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Old 07-29-2003, 09:40 AM
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I worked on an eclipse with a big greddy front moutn and stock turbo. Same problem, coun't hold boost, especially at high rpm.The turbo was too small to make up for the pressure drop.
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Old 07-29-2003, 10:48 AM
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my friend blew up 2 stock turbos, trying to run 15psi
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Old 07-29-2003, 11:32 AM
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Originally Posted by j9fd3s' date='Jul 28 2003, 01:05 PM
yah if it had a boost leak and the stock ecu it woudnt idle either, i like voskos answer



mike
not true, some leaks only open up above certain PSI, weirdness of turbo cars
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Old 07-29-2003, 11:38 AM
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Originally Posted by j9fd3s' date='Jul 29 2003, 11:48 AM
my friend blew up 2 stock turbos, trying to run 15psi
i blew one running 7psi. it sprayed my hood with oil whenever i got on boost. that was sweet. check the gas fill the oil
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Old 07-29-2003, 11:50 AM
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Originally Posted by vosko' date='Jul 29 2003, 08:38 AM
i blew one running 7psi. it sprayed my hood with oil whenever i got on boost. that was sweet. check the gas fill the oil
todd managed to get all 6 quarts from the pan out if the turbo in about 100yards
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Old 07-29-2003, 01:58 PM
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i only run 10+ psi when i need to show a FD guy what a S5 TII can do
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Old 07-29-2003, 02:07 PM
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Originally Posted by Cheers!' date='Jul 29 2003, 10:58 AM
i only run 10+ psi when i need to show a FD guy what a S5 TII can do
punish a scale?
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Old 07-29-2003, 09:10 PM
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Originally Posted by j9fd3s' date='Jul 29 2003, 11:07 AM
punish a scale?
heh....



I've been running .8bar on my turbo II for the last year or so. Put down 232 rwhp@11 pounds, and the turbo is still in pretty good condition.
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