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How much PSI's are you running?

41K views 57 replies 17 participants last post by  lidbloomsteven  
#1 · (Edited)
Hi there,

I was wondering how much psi's are people running on there car's?
Let me start!!!

Model/engine: Bmw e46 323ci M52tu
Power output: 320hp at the crank
FI: ASA Turbomex tm12 supercharger
Internals: Stock
Boost: 10psi's at 6500rpm's

Thanks ;)
 
#4 ·
complete stock engine.
it's been 4 years now.
i know that in forced induction forums instead of telling you 'welcome' they tell you 'ARP studs, cut ring, rods, pistons' but if you don't care about mainstream mods, 15psi are just fine with stock internals as long as you have a proper tune.
 
#39 ·
323i with b30 intake and intake cam, ms43 ecu and etc...
Runing 10 to 15 psi, with 10psi its safe and makes around 360hp at crank, with 15psi and more agressive ignition probably was 400+ but broke gearbox in a day, next upgrade is gearbox probably will try e46 m3 gearbox, but maybe will try from 320d 6speed manual its more cheaper..
Now have boost leak, but still with leak i do 100-200km\h in 12.2s, m3 does in 12.4s
 
#46 ·
10 psi on generic .63 a/r turbine turbo, tuned on MS43. Minor exhaust leak so full boost at around 3600 rpm.

Going OT here but, do any of you MS43/42 guys wanna start a thread where we can compare our tune files? Obviously there is going to be some risk so we would need to set up some sort of disclaimer. I'd gladly share my tune file and injector specs once I get my MAF sensor working again. If so we would need to give some basic info like what engine load (mg/stk) is your boost level, and if you run a modified maf sensor or not
 
#56 ·
There is no problem to drive turbo everyday, u want boost u make boost if u dont then no boost :) its diferent things, mine is turbo, but i also get to drive my friends chraged 325ti, it makes around 300hp at crank, its realy fast from low rpms to end, but that moment then you getting full boost.... :)