How much psi
 

whats up guys. i was planning on throwing a blower on my stock s52 and i was wondering how much psi can i run stock without blowing it ?

I am going to guess 7psi with the right fuel tuning. (its all in the tuning)

ive heard anything over 6psi, and your asking for trouble. yes tuning makes a huge difference but even then your reducing te engines reliability by quite a bit.

And before some guys on here with charged s52's come blasting about how theyve had their blown for years. Yes it also depends on how you drive it, if your a conservative driver that likes to play around once in a while, your ok. But if you are constantly beating on it, youll do some damage. Id recommend at least getting a commetic head gasket and arp head studs!

just my 2cents

Jay

I'm running 11.5 psi.

hey thanks for the info

what's done to your motor

nothing...hasn't been opened at all

How about M52?

Wow ! Lol what are you running to the wheels and what kinda blower you running ? If you don't mind me asking

~375whp on a vortech V1. Lots of guys do it btw...see bimmerforums! Obviously good tuning and aftercooling is key.

BlownM3 on here has been blown for a while, runs higher PSI than the setup was designed, has it tuned for each change he makes and drives the living piss out of it. In fact, he twisted a driveshaft last weekend..

Im running 18psi with a Gt35r apr headstuds and an mls .140

Wtf? Out of nowhere? Sweet! You gotta be @ 450+ RWHP. Pics? Stock tune?

I only ran it for a few days, its way too much for the streets. I turned it back down to 12psi for daily. I mean wheel spin in 3rd ftw!

At 18psi i would say i was very close to 500rwhp.

Im on a custom tune, no pics of yet.

Its an
m52
apr2000
head studs
mls head gasket
spa manifold
gt35r
550cc injectors
custom charge piping/downpipe exhaust

i did all the work my self.

And I thought our FI scene in Canada was pretty terrible...