Thread: how much psi!!

Oh, you're at 4 bar... You'll probably be okay maxing out the turbo on those injectors then. No way I'd do 18 psi on S4 cams though.

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Just curious why cant I run 18 psi on s4 cams.. should I stick wit the stock cams or maybe s3s...

did you read what these people were saying... you can run whatever psi you want for all we care just dont complain when your motor blows up. you cut corners your going to end up paying for it in the long run

QTMFT.

You can also upgrade the comp housing to the T04B cover.

dont think of boost as a good thing. boost is the restriction of air flow from the comperssor to the turbine.

think of it as a loop in and out of the engine.

if the engine can flow more air.. ie cams , head porting, higher flow manifolds ,and tons more varables then boost will go down with the turbo flowing the same amount of air

so with s4 cams you will over speed the turbo and shorten its life and over heat the intake charge

Oh ok I got you thanks guys for the info and. Let u guys kno how things go..

Good info I did not know that. So with s4's your boost should be lower then with stock cams.
I'm currently doing a t28 upgrade from a t25 and thought that 15 psi should be ok for daily driving.