ZR-1 Net Registry Forums - View Single Post

efnfast · 04-28-2014

The timing chains on these tend to rattle on start up, this is normal. It sounds like a rod knock, it will quite in a couple seconds.

To check for secondary operation, floor it. Under load, not sitting still. If the motor falls on it's face at 5000 rpm, secondaries are not opening. The engine should fly to 7K, rev limiter is at 7250. In third, this will put you around 100, so you may want to do it in second, if everything is working properly, hang on.

Good luck.

04-28-2014	#9
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,272	Re: Questions/Help on buying a ZR1 The timing chains on these tend to rattle on start up, this is normal. It sounds like a rod knock, it will quite in a couple seconds. To check for secondary operation, floor it. Under load, not sitting still. If the motor falls on it's face at 5000 rpm, secondaries are not opening. The engine should fly to 7K, rev limiter is at 7250. In third, this will put you around 100, so you may want to do it in second, if everything is working properly, hang on. Good luck.