could someone tell me the maximum boost i can run on standard pistons/compression/fuelling? the car is a 1990 S2 with K&N 57i, bailey dump valve, magnex exhaust system.

look forward to hearing from you

DaveRS

 

I looked into this mate there are a few that are running over 20 psi but you will need to have bigger intercooler.dont just turn it up as it will blow get it checked over by a tuner..
also is car chiped if not u wont run no more than 10psi or it will cut out...

aint seen you around i only live in gorleston


jon

 

guys when they say 10psi max boost...is that the peak figure or the held boost? as mine peaks at about 8-9psi and holds about 6psi...maybe 5 lol but i dont trust my gauge as it rests on about 1psi any way lol

thanx

bassboy

 

On a standard intercooler, no more than 13-14psi mate, i ran 14 psi on a standard intercooler, still quick, but not efficent, get a pace and u can run a bit more providing its chipped!

 

get it set up right with a uprated intercooler or charge cooler and you see 190-200bhp on 18psi max for standard compression anymore and should see a blown engine not long after

 

by the way when they 10psi on standard ecu thats peak figure should hold 8psi though

 

Mine goes up to 18psi, might be a tad more. It holds aswell. Dont like holding it on that though. 15 psi is fine for me.

 

Mines standard, samcos, boost gauge, and a -31... mine boosts at 11psi and holds at 10-9psi... mainly 10.

 

mines is set up to similar figures of rs jay. Im running 2 stage boost 18psi on high boost and 15psi on low boost for town driving

 

I'm running 16 psi with standard IC. 22 PSI is no problem with standard compression if the timing is spot on, the fueling is good and a good IC is fitted.

 

16psi with a standard intercooler is probably okay in winter but once it gets a hot in the summer (if we do see summer this year) it'll run very hot. I dont think 22psi would last on standard compression and even if you were running that kind of power you will need a 5th injector or efi management for anything over around 210bhp