whats max psi of stock turbo?

diddlkiss · 01-27-2013, 07:40 AM

If I have DP(catless) DCI BV FMIC and meth,
whats the max psi of stock turbo with meth?

Eric335 · 01-27-2013, 07:50 AM

Max PSI in the mid-range would be around 19psi. I would lower it for a DD setup. It tapers to redline at around 14-15 PSI i believe, as long as you are FBO.

There isnt a end-all-be-all specific PSI. It changes throughout the rev-band. You also have to consider the transmission and power/torque levels. An AT might run less boost in the mid-range to spare its transmission, while a 6MT goes balls to the wall.

Gugs · 01-27-2013, 10:44 AM

Turbos dont have max psi. They have a psi where they loose effiecency in making power. That is the ceiling.

Eric335 · 01-27-2013, 10:51 AM

Quote:

Originally Posted by Gugs

Turbos dont have max psi. They have a psi where they loose effiecency in making power. That is the ceiling.

Very true, I was more of stating the safe-ish operating PSIs that i would recommend. Im sure our turbos could make mid-20s PSI, but it wouldnt be for a long time nor safe.

135Pats · 01-27-2013, 11:04 AM

www.e90post.com/forums/showthread.php?t=796291

01-27-2013, 07:40 AM	#1
diddlkiss Second Lieutenant 17 Rep 283 Posts Drives: 2010 335i E90 Lci N54 Join Date: May 2012 Location: San Jose iTrader: (0) Garage List 2015 F33 435i [0.00] 2015 F82 M4 [0.00] 2011 F10 535i [0.00] 2010 BMW E90 LCI 335i [7.50]	whats max psi of stock turbo? If I have DP(catless) DCI BV FMIC and meth, whats the max psi of stock turbo with meth?
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01-27-2013, 07:50 AM	#2
Eric335 Colonel 130 Rep 2,489 Posts Drives: 2007 E92 SG 335i 6MT Join Date: Apr 2011 Location: SW Florida iTrader: (0) Garage List 2007 BMW 335i [7.66]	Max PSI in the mid-range would be around 19psi. I would lower it for a DD setup. It tapers to redline at around 14-15 PSI i believe, as long as you are FBO. There isnt a end-all-be-all specific PSI. It changes throughout the rev-band. You also have to consider the transmission and power/torque levels. An AT might run less boost in the mid-range to spare its transmission, while a 6MT goes balls to the wall. __________________ Last edited by Eric335; 01-27-2013 at 09:33 AM..
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01-27-2013, 10:44 AM	#3
Gugs Banned 28 Rep 457 Posts Drives: E92 JetBlack Join Date: Jul 2012 Location: Long island iTrader: (1)	Turbos dont have max psi. They have a psi where they loose effiecency in making power. That is the ceiling.
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01-27-2013, 11:04 AM	#5
135Pats Major General 456 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	www.e90post.com/forums/showthread.php?t=796291 __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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