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BMW 3-Series (E90 E92) Forum
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Boost??
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| 07-26-2015, 09:30 PM | #1 |
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Boost??
Hey everyone,
I'm curious what kind of boost pressure people see at max with Stock turbos and a stage 1+ car. As a point of reference, my boost peaks at 18 PSI in the middle 4000 RPM range. I have Cobb V3, PTF tune, FMIC, DPs, Charge Pipe, Diverter Valves, recent plugs, coils, walnut blast, vacuum lines and boost solenoids. Aso, BMW replaced my turbos about 10K miles ago.... I'm told I can run a couple more PSI at peak given that I just added the DPs, but 18 PSI seems pretty fast and stable.. Thoughts???
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JWebb335xi
MHD / Wedge / 93 Octane/ xHP / FMIC / Inlets / Catted DPs / CP / DVs |
| 07-26-2015, 09:34 PM | #2 |
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Brigadier General
 
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Drives: E90 6MT FBO; '18 F150 Platinum
Join Date: Jul 2013
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I've seen 21+ psi on stock turbos. I run 18psi on E30 and the race flash. Enough for daily driving but still not going to blow the turbos in 3k miles. Also, the "stages" are more or less relative, I'd just say FBO pump gas protune.
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 2008 335xi 6MT | VRSF Catless DP | VRSF 7" FMIC | VRSF CP | TIAL BOV | DCI | MHD 2+ BC Racing BR | Stoptech 600 | Firehawk Indy 500 255 Square | Atric Altimax 225 Sq. 2018 F-150 Platinum 701A | FX4 | 3.5 EcoBeast |
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| 07-27-2015, 01:52 PM | #3 |
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BimmerPost Supporting Vendor
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Depends on your cylinder timing. If your tuner lowered your timing , car can reach over 20 psi safely.
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