Steve's Nova Site is an automotive enthusiast website dedicated to the 1962 - 1979 Chevrolet Nova, Chevy II and Acadian automobiles. We work together to preserve, restore, drive, show, race and provide fellowship for these classic cars. This is one of the best places to find information about parts, rebuilding, restoration and racing. This website is not affiliated with GM, General Motors or Chevrolet in any capacity.
Ever since I got my auto meter tachometer I have notice that my car will not go past 4000 rpms. It sounds like the motor is at its limits at 4000 rpms and I cant figure it out. I have a Holley 670 street avenger, 454 lift/218 duration cam, offenhauser manifold, Longtube headers with single 2 inch exhaust(part of the problem), timing is at 38 total. It will rev to 5000 easy in neutral it just wont do it in gear floored manual shifting. Any Ideas?!?!?
Ill look into the HEI module thing, but it runs so good on up to 4000 than it just wont go past. I dont think my valve springs are week because they are brand new and are made for high revving motors with the dual spring with an inner dampener inside of those. How much are those modules for the HEI?
I'd check the distributor out more closely. Remove the cap and make sure the mechanical advance flyweights aren't binding-up or being restricted in any way. Another thing to try is to throw another distributor in it and see if it get's any better.
I hate to say it but it sounds like iginition to me. It might be something else though but the most-obvious and easiest thing to eliminate first is the ignition. A stock engine will rev higher then 4,000 RPM.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.