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So dyno's done. I got a staggering 143.6 hp @ 4600 RPM, and 179.2 lbs-ft @ 3800. That's extremely close to FFVulcanPowah's dyno pull on a significantly less-modified engine. My tuner had global timing set to 23 degrees, and refused to increase it because he didn't want to blow up my car, but he let me push it up to an extra 4 on the SCT X3, which I did the second I got home. It's not pinging, which is a good sign, and it's significantly better. Also, I'm concerned that my max power is at 4600 RPM, versus the usual ~5300. The valve-springs are new and stiff, so there's no issues with valve-float. This makes me think intake restriction somewhere. Or exhaust. I'm not stopping until I reach 190 at the wheels.
Think a tranny rebuild will reduce the power loss by a couple %?
Think a tranny rebuild will reduce the power loss by a couple %?