fuel press.

[CJ's6]

what do i set my fuel pressure on, i set it @ 42lbs and getting knock @ 15LBS of boost(i have no scan tool,can hear the knock) my mods are blue tops (36lb) inj, adj fuel press reg, walbro 307, chip for the blue tops from joe lubrant, adj wastegate, just put the 980 valve springs in a month ago at the same time as the inj. any help would be appreciated.
thank you.
ckcj

 

[Ormand]

You need a scan tool. Without knowing what the O2 readings are, and going by audible knock, you're on thin ice. Won't be too long before something breaks. You can try upping the fuel pressure to 44 or 45, to see if that helps.

 

[CJ's6]

thanks for the reply. i will be getting a scanmaster soon, b4 i do any more mods. thats really all i need for baseline general tuning isnt it.