Boost on stock turbo ?'s
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From: San Marcos CA
Car Info: 03 WRX "Bling Bling" Silver
I got an mbc and i was jsut cruious if it is safe to run 15 psi...I have no tuning done... I jsut got helix down pipe 2 a hks carbon ti
and a gruppe-s up-pipe...Any help would help
thanks
mike
and a gruppe-s up-pipe...Any help would help

thanks
mike
Originally posted by mexicanpizza
Just crank it up to 18psi...it will be fine.
Just crank it up to 18psi...it will be fine.
Don't listen to him.
15psi is just perfect for now. Make sure that you set is in 3rd gear (or higher). setting boost in 1st or 2nd gear is a no no
Here's why: boost in 1/2 is less than 3/4/5. I think for a 5spd, it's something like 9psi or 10psi in 1/2, and then roughly 14 psi 3/4/5.
So happens is when you set boost in 1st or 2nd, it's over boosts in 3rd, and at times, way too much, like, oh, i dunno, 18psi... Ka Boom.
Happy Self Tuning.
-Gagan
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From: BAIC
Car Info: 03WRX=sold 08STI=newhotness
Originally posted by joltdudeuc
boost in 1/2 is less than 3/4/5. I think for a 5spd, it's something like 9psi or 10psi in 1/2, and then roughly 14 psi 3/4/5.
[/B]
boost in 1/2 is less than 3/4/5. I think for a 5spd, it's something like 9psi or 10psi in 1/2, and then roughly 14 psi 3/4/5.
[/B]
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Actually you can set it in 1st and 2nd with no over boosting problems. It all depends on what boost controller/solenoid you're using. Usually you use 2nd because 1st rolls by too fast and you won't get enough resolution to see the boost. Top of 3rd, you're going a bit too fast on the street.
Stock turbo will boost 20~25psi, but anything past 16psi it's just a big hair dryer, blows nothing but hot air. 16psi is about the edge the limit on the stock turbo.
15psi is safe, but if you have a good boost controller that bleeds and maintain boost accurately, you can run it near 16 and not worry about over boosting problems.
Also if you have a gain setting, make sure it's set fairly low, as that will contribute to over boosting, you might get awesome spool up, but you'll be spiking everywhere.
Tommy
www.mpjperformance.com
Stock turbo will boost 20~25psi, but anything past 16psi it's just a big hair dryer, blows nothing but hot air. 16psi is about the edge the limit on the stock turbo.
15psi is safe, but if you have a good boost controller that bleeds and maintain boost accurately, you can run it near 16 and not worry about over boosting problems.
Also if you have a gain setting, make sure it's set fairly low, as that will contribute to over boosting, you might get awesome spool up, but you'll be spiking everywhere.
Tommy
www.mpjperformance.com
Originally posted by joltdudeuc
Don't listen to him.
15psi is just perfect for now. Make sure that you set is in 3rd gear (or higher). setting boost in 1st or 2nd gear is a no no
Here's why: boost in 1/2 is less than 3/4/5. I think for a 5spd, it's something like 9psi or 10psi in 1/2, and then roughly 14 psi 3/4/5.
So happens is when you set boost in 1st or 2nd, it's over boosts in 3rd, and at times, way too much, like, oh, i dunno, 18psi... Ka Boom.
Happy Self Tuning.
-Gagan
Don't listen to him.
15psi is just perfect for now. Make sure that you set is in 3rd gear (or higher). setting boost in 1st or 2nd gear is a no no
Here's why: boost in 1/2 is less than 3/4/5. I think for a 5spd, it's something like 9psi or 10psi in 1/2, and then roughly 14 psi 3/4/5.
So happens is when you set boost in 1st or 2nd, it's over boosts in 3rd, and at times, way too much, like, oh, i dunno, 18psi... Ka Boom.
Happy Self Tuning.
-Gagan
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Originally posted by mexicanpizza
Stupid question = stupid answer.
Stupid question = stupid answer.
it was a Question..and he deserves an answer...help out or don't post at all.
-Zoeb


