The porting is over - ZR-1 Net Registry Forums

Jim Nolan · 07-10-2009

I picked up my '92 today from South Georgia Corvette today and I am satisified with the results. The before and after dynos show a definate improvement. The one thing that I was most pleased with was the dyno results. With the full porting, headers and the dyno tuning it pulled 394.5 hp and 354.9 torque, at peak. The most impressive part was the fact the peak occured at 5,500 rpm and never fell off up to 7,000. The horsepower on the other hand kept climbing up through 6,500 rpm before it leveled off. The big plus was once they peaked they never dropped off.

My pre-mod dyno numbers showed a peak about 5,300 and dropped off torque from 349.4 at 5,300 to 286.7 at 6,500 and horsepower from 357.8 at 5,300 to 319.1 at 6,500 rpm.

The temp that was 91.

07-10-2009	#1
Jim Nolan Join Date: Jan 2007 Location: Florida Posts: 241	The porting is over I picked up my '92 today from South Georgia Corvette today and I am satisified with the results. The before and after dynos show a definate improvement. The one thing that I was most pleased with was the dyno results. With the full porting, headers and the dyno tuning it pulled 394.5 hp and 354.9 torque, at peak. The most impressive part was the fact the peak occured at 5,500 rpm and never fell off up to 7,000. The horsepower on the other hand kept climbing up through 6,500 rpm before it leveled off. The big plus was once they peaked they never dropped off. My pre-mod dyno numbers showed a peak about 5,300 and dropped off torque from 349.4 at 5,300 to 286.7 at 6,500 and horsepower from 357.8 at 5,300 to 319.1 at 6,500 rpm. The temp that was 91.