Stupid car refuses to let me off with just 1 dyno per season. This time it's just too damn hot. I started with a 5 minute cruise on the dyno, then made 3 unrestricted pulls just for funsies. It ripped off 292whp and 329wtq with a properly flat torque curve. I was pumped, holy hot damn this motor rips and I inadvertently kick ass at building motors too! :lol: I then proceed to install last year's plate (38mm) and ripped off 270whp, then 272 just to make sure it wasn't a fluke. Whoops. So I toss in my smallest plate, a 36mm, and made 262whp. Sweet, I can deal with that amount of ballast. Oh by the way, what was the torque on that pull (I've always been short on torque)? 322 you say? FML. As I investigated further, I see I dropped all of 7 ft/lb via restrictor plate (because it peaks at 2000 RPM) so clearly plating down will not quell the torque and hp is already where I want it. I have a dual 2.5"-3" single aftermarket y-pipe installed. What impact will a factory y-pipe have? I need to lose 12 ft/lb and, preferrably, enough hp to not necessitate a CMC 1 restrictor plate. How many of you LT1 guys are running bigger y-pipes and not busting the torque? My car has always pulled happily to the rev limit, but I know Ryan Rahjes' Camaro nosed off hard after peak and I've always suspected the factory y-pipe to be the cause. On the other hand, I can't race period the way it sits now. I rebuilt it last year in the garage with a 3 stone hone, factory never-been-blowed-up pistons, rods, and crank (which I had polished). I used name brand rings, main and rod bearings and a Felpro gasket kit which, as I recall, includes a .038" head gasket with the factory being close to .030" so nowhere in that process should I have gained an unreasonable amount of torque. It's as if the motor broke in a second time, I figured it'd pooch out gradually but apparently I don't suck as bad as I thought at rebuilding motors. In light of this, I'm going to press again this season for the RCR for dyno pulls to start at 3000 RPM. My torque had dropped to 315 by then and would be raceable in the RPM range we actually operate in. Here's the sheet from today, the 3 pulls represent unrestricted, 38mm plate, and 36mm plate.