I just installed my Walbro 255 HP and drilled the stock FPR using a 1/32" drill bit. Using the Greddy blue box I was getting detonation before above 7000 rpms, but this seems to have solved the problem. I ordered a B&M fuel pressure gauge to keep an eye on things. Should I get the B&M FPR as well, and if so, at what amount should the fuel pressure be set?

 

****! My car is still detonating! I don't know what to do about this thing. Performance is so damn inconsistent. What should I do?

 

I know u probably dont want to hear it but a standalone with good tuning would probably solve your problems

If you don't want to go that route, ditch the blue box and get some 450cc injectors, with a smc and go to the dyno.

 

the fpr won't help too much.. it will only raise the fuel pressure

 

Well, I guess I might as well spend some more money that I don't have on a standalone! I sure the hell don't want to spend money on a rebuild + hondata so what choice do I have? I should have just gotten a used M3 or something, this is really pissing me off!