510 Pontiac engine with EFI Tripower conversion warm up on the dyno 

Dave Harrington's 510 Pontiac Pump gas engine makes 571.7 hp at 4800 rpm and an impressive 666.6 ft lbs of torque at 4200! This engine is based of a MR-1 aftermarket block and 290 cfm 85cc KRE D port heads. Engine uses one of our custom ground hyd roller cams topped off with a stock Pontiac Tripower intake with our custom 1" EFI to Pontiac Tripower spacers and a Fitech EFI Tripower! With our custom air cleaner bases and a K&N style filter the combo made 658.9 ft lbs of torque at 4200 rpm and 570.9 hp. That's right.... we lost 7.7 ft lbs of torque and .8 hp! Not too shabby....
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