SR with KA Fuelpump... Boost question

[gorgasm]

I have an S13 SR swap, and im still using the fuelpump from my KA... Im running stock boost now.. I was wondering if its safe to raise the boost to 12-13psi without it being dangerous... is anyone doing this?

[Flybert]

It is dangerous. Don't do it. Throw down $90 and get yourself a walboro.

[speeddreamz]

It is dangerous. Don't do it. Throw down $90 and get yourself a walboro.

Agreed, its very dangerous without a fuel pump. When I had a stock sr, with 370s, I was running lean with a fmic and all the bolt ons. Thats because the stock fuel pump really cannot sustain even the 370s. If you be too cheap you'll blow your motor.

[drift freaq]

stock fuel pump on USDM cars is for 270 injectors, SR injectors are 370. Putting in a Walbro is cheap inusurance. Plus if your running a basically stock setup your little T25 is going to start pushing hot air around 12lb's of boost so I would recommend not even trying to boost that high. Keep your boost levels to 10-11lb's max unless you drop a T28 or larger on.