331 dyno still very dissapointing, experts help needed
Ok, recently swapped in a 331 stroker motor. Have a C&L Maf calibrated for my 30lb injectors, AFR 185s with FTI upgraded spring package, Performer RPM intake, and an FTI custom cam (Gross Valve Lift: .5728 / .5632; Duration 224*/ 228*) with a powerband from 2800-6100. TPS voltage is at .97.
I've included both my dyno sheets and have some questions on what to do.
Original dyno run showed that the car was running pig rich with fuel pressure at stock levels. Dropping that fuel pressure to 35psi netted some decent gains.
On next trip, fuel pressure was dropped to 28psi and the A/F ratio got a little better but netted only 4hp more.
And the questions:
1) Given my parts, shouldn't I be expecting more out of my engine than I'm getting? I was expecting more in the 360hp range.
2) I am going to swap a Pro-M MAF in and see if that improves my A/F ratio. If my MAF is somehow off, could it be the reason that the car is not performing as well as it should? My friend said something about how even though you can compensate with the AFPR, if the MAF is off, it'll still throw the timing advance and whatnot way off. Is that true? Do I need a base fuel pressure of 40psi for everything to work optimally and then work with maf adjustments, or does it not matter as long as you get a good A/F ratio at the end
3) Do I have some sort of bottleneck or mismatch that is causing such an early and massive dropoff in power? Do I need a bigger intake?
4) I was planning on running nitrous and have a SCT chip. Will this chip and some good dyno tuning cure any problems I might be having?
Thanks!
Ok, recently swapped in a 331 stroker motor. Have a C&L Maf calibrated for my 30lb injectors, AFR 185s with FTI upgraded spring package, Performer RPM intake, and an FTI custom cam (Gross Valve Lift: .5728 / .5632; Duration 224*/ 228*) with a powerband from 2800-6100. TPS voltage is at .97.
I've included both my dyno sheets and have some questions on what to do.
Original dyno run showed that the car was running pig rich with fuel pressure at stock levels. Dropping that fuel pressure to 35psi netted some decent gains.
On next trip, fuel pressure was dropped to 28psi and the A/F ratio got a little better but netted only 4hp more.
And the questions:
1) Given my parts, shouldn't I be expecting more out of my engine than I'm getting? I was expecting more in the 360hp range.
2) I am going to swap a Pro-M MAF in and see if that improves my A/F ratio. If my MAF is somehow off, could it be the reason that the car is not performing as well as it should? My friend said something about how even though you can compensate with the AFPR, if the MAF is off, it'll still throw the timing advance and whatnot way off. Is that true? Do I need a base fuel pressure of 40psi for everything to work optimally and then work with maf adjustments, or does it not matter as long as you get a good A/F ratio at the end
3) Do I have some sort of bottleneck or mismatch that is causing such an early and massive dropoff in power? Do I need a bigger intake?
4) I was planning on running nitrous and have a SCT chip. Will this chip and some good dyno tuning cure any problems I might be having?
Thanks!