Engines will produce +/- 2% of advertised power at the flywheel. Advertised power levels are achieved using an electric water pump and specific induction and exhaust systems. Power will vary after pulley systems are installed or if changes are made to the induction or...
torque @ 3500 rpm. Requires premium fuel. The new plastic composite ZZ4 timing chain cover will not fit with a "short" water pump. 12561723 - ZZ4 short block partial assembly, comes with Gen.I block with 4-bolt main caps, forged crank for one-piece rear main seal, hypereutectic pistons...
The bell housing bolt patter on LS series engines is identical to the previous generations of small block chevrolet. The crank shaft on the LS series engines is internally balanced and does not need external weights on the flywheel or flexplate. ...
Pass #1: The car ran cleanly all the way to 7200RPM (redline) in each gear, putting about 500hp to the rear wheels (about 660hp to the flywheel). The plugs were checked and they looked lean so we bumped the carb jetting from 83/90 to 86/93 for the next pass. Pass #2: The ca...