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No, I'm running the "stock" '98 Firebird PCM. I think you're misunderstanding my MAF issue. My PCM can only handle up to 11500hz, no getting around that without going to a different engine management system. Right now at 10lbs of boost I'm in the 11000hz range. I realize the MAF sensor itself goes beyond 11500hz, but without a MAF translator to scale that back it's pointless because the PCM won't be able to do anything with >11500hz.
I have HP tuners so I have it "calibrated" to my current setup. It will have to be adjusted once I start scaling back the MAF frequency.
And lastly as a point of reference my mechanic's '98 3.8L Firebird put down 600+whp with one step up in heads and cam, so yeah they flow a lot of air.
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'98 T-Top Firebird: L67 shortblock, Intense Racing: Stage 3 heads + Stage 3 Turbo Cam + lightweight pushrods, Yella Terra 1.7 RRs,PT GT 6152E , RK Sport Headers, Spearco 28x17x3 FMIC, Bosch 42.5lbs, Walbro 255, Motive 3.73 gears, Huges 3200 stall, Koni/Spohn suspension, and an extra ~400lbs of the "boom-boom-thud" stuff.
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