Boostin240sx
05-23-2011, 05:48 AM
Here is the setup of the major items:
S2 RB25DET
Godspeed Exhaust Manifold
Freddy Intake Manifold
740cc Nismo Injectors
Aeromotive FPR set to 45 psi
Walbro Fuel Pump
Power FC w/ FC Datalogit
Z32 MAF
Plugs gapped at .028"
T70 turbo
My wastegate kept boost spiking to 14 psi so I decided to tune it at 14 psi. So the problem is at the end of a 3rd gear pull at 14 psi I get to 4.8V and 4.9V with the Z32 MAF. My AFRs are 10.9 to 11.5 until I hit the 4.8V and 4.9V section of the map and it almost hits 13 whick is pretty much at redline.
First question is at the end the MAF resolution, is it not going to be able read load is well almost hitting max load thus causing the spike in AFR?
Is my only option of a larger MAF a Cobra MAF?
Because I'm hitting almost max load on the Z32 MAF would an approximate guesstimate of crank HP be 500 to 550?
S2 RB25DET
Godspeed Exhaust Manifold
Freddy Intake Manifold
740cc Nismo Injectors
Aeromotive FPR set to 45 psi
Walbro Fuel Pump
Power FC w/ FC Datalogit
Z32 MAF
Plugs gapped at .028"
T70 turbo
My wastegate kept boost spiking to 14 psi so I decided to tune it at 14 psi. So the problem is at the end of a 3rd gear pull at 14 psi I get to 4.8V and 4.9V with the Z32 MAF. My AFRs are 10.9 to 11.5 until I hit the 4.8V and 4.9V section of the map and it almost hits 13 whick is pretty much at redline.
First question is at the end the MAF resolution, is it not going to be able read load is well almost hitting max load thus causing the spike in AFR?
Is my only option of a larger MAF a Cobra MAF?
Because I'm hitting almost max load on the Z32 MAF would an approximate guesstimate of crank HP be 500 to 550?