Fuel pressure with big turbo
02-17-2002, 04:42 PM
#1
Drifting
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Fuel pressure with big turbo
For those out there with big HP, What fuel pressure should i set my FPR to with the following mods...
Kokeln stage V turbo
MAF
Big Injectors
Ported head
Chips
Dual Wastegate.
thanks,
Kokeln stage V turbo
MAF
Big Injectors
Ported head
Chips
Dual Wastegate.
thanks,
02-17-2002, 08:17 PM
#2
Race Director
Well, we would need quantitative values to really determine how much air is flowing through your engine.<ol type="1">[*]Turbo, how much boost are you rnning?[*]MAF, what is the size/diameter of the sensor?[*]Injectors, what is the flow-rate of the injectors?[*]Head, how agressive of porting? What size valves? 3/5/contoured valve job?[*]Chips, what kind?[/list=a]With the exact same parts list, we can have two cars with one flowing twice the amount of air as the other, so tuning them will be completely different.
02-18-2002, 04:32 AM
#4
Race Director
Start high to be safe. Like 50psi with the vacuum disconnected. If it's too rich across the board, lower fuel-pressure. Don't let any part of the air-fuel curve fall leaner than 12.5:1. If you get high-RPM leanness that can't be dialed out, then perhaps the injectors are too small and you need to reduce boost. That's the general procedure.