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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > MAX BOOST



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      11-17-2010, 11:22 PM   #1
dirtmaster666
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MAX BOOST

just curious what is the max psi you could probobly run with catback exhaust charge pipe with synapse bov and dci..(basically i looking to get the procede and just wondering what the highest safest psi i could run).i am new to this and i prob stick to the autotune but just curious.
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      11-17-2010, 11:29 PM   #2
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In terms of 'safety', high octane fuel is very important when running higher psi. So, for short bursts of accleration or 1/4 mile drag races, some people go to 16-17psi with your level of mods. You should really get downpipes and an intercooler if you want to go higher. Again, octane will help keep you safe.
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      11-17-2010, 11:37 PM   #3
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Downpipes, intercooler, and meth: shoot for the stars (I recommend staying below 18)

Make sure you run meth and racegas for max boost
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      11-18-2010, 12:10 AM   #4
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below 16 psi would be considered safe.
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      11-18-2010, 12:17 AM   #5
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if you get a procede AUTotune will set your psi to the most efficient PSI.
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      11-18-2010, 12:18 AM   #6
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Quote:
Originally Posted by Jon335iFL View Post
if you get a procede AUTotune will set your psi to the most efficient PSI.
One time I got autotuned to 19 psi.
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      11-18-2010, 12:40 AM   #7
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Quote:
Originally Posted by Bimmer This View Post
One time I got autotuned to 19 psi.
lol. How'd you do that?
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      11-18-2010, 01:27 PM   #8
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must have messed with the max boost limit
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      11-18-2010, 01:49 PM   #9
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Or been running race gas in ideal conditions. I have been autotuned in upwards of 18psi with race gas and ideal conditions
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      11-18-2010, 01:51 PM   #10
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Well im saying even if ur car can theoretically target 20 psi, the procede has a threshold max boost level that he must have messed with..i think its set at 17 or something.
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      11-18-2010, 01:53 PM   #11
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Quote:
Originally Posted by infinitekid2002 View Post
Well im saying even if ur car can theoretically target 20 psi, the procede has a threshold max boost level that he must have messed with..i think its set at 17 or something.
Yeah, it does have a max boost setting, but if you are running racegas and want to up the boost that can be done.
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      11-18-2010, 11:55 PM   #12
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i am running 94 octane so with the mods done so far if i set max psi to 16 and use auto tune i should be safe?
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