Revision Corvette ZR-1 model year 1990 #125

[Ccmano]

Originally Posted by Thomas ZR-1

After the test drive it was time for the official technical check at the German T?V. The ZR-1 passed the required tests including the special check for getting registered as a classic vehicle in Germany.

Based on the porting of the injector housings and the plenum the engine seemed to be really powerful. So I checked the engine power on a car dyno in Cologne with 406.5 PS (401 HP) as result. This was over 25 PS (24.7 HP) more than stock. It?s justified on the better air flow into the engine by the ported intake.

All I can say is WOW! 🤩 Your level of detail work is amazing. I'm curious, did you upgrade your "tune" on the EPROM chip or are your running stock? If you did upgrade the chip, who did the tune? If your running a stock chip there are a few more hp (~10-15) available given your top end porting.
H