Boost Increase

[M3cadet]

What is a safe boost level to increase to so that you won't damage your engine?

 

[90tsi]

get a fuel pump and do the rewire and you can run 15psi safely, maybe higher, but I wouldn't go higher w/o a logger to show how your motor is doing.

 

[Tsigoon]

What kind of pump is best? I've heard walbro ALOT, but have also heard that edelbrock makes a good high flow pump. I'm looking at doing this soon along with (possibly) 495cc injectors (I don't know if I'll need a fuel computer or not with those...)

Oh well, any help would be great- BTW i'm not building this car for 1/4 mile, but for autocross, if that makes a difference...

 

[Formz]

you can run 15psi on the STOCK fuel system with NO PROBLEM. If you want, putting a walbro 190lph or 255lph will let you turn it 16 or so. If you have upgraded injectors you're going to need some sort of fuel control.

Some people have had good luck putting a 2g maf along with 550's in at the same time and have everything be alright. But I'd put an AFC in or something similar.

 

[ProjectGSX]

Originally posted by Tsigoon
Oh well, any help would be great- BTW i'm not building this car for 1/4 mile, but for autocross, if that makes a difference...

Make sure you know what the rules for your class are. If you perform the wrong mod, you might get kicked into a more competitive class.