Madmx
Well-known member
Yup and sound. There is a really big difference of opinion on what a cast iron flywheel can spin. Usually the magnet flies off destroying the coil and part of the block. But if the heavy cast iron flywheel fails at 6k rpm... not good. Best to just spend some money on a pvl or billet aluminum. The flywheel needs to be lapped to match the crank taper perfectly. Then remove the governor and higher rate valve springs. The next weak link is the rod. The stock rod will handle alot but not continuous 7k rpm runs. The billet rods come in different lengths to customize the compression ratio.I’ve never heard of valve float as a limiter. Does it just start missing when they float?
Many tuners just go for the valve springs. Which is not safe. There are some newer coils with a built in rev limit. Harbor freight racing ghost engine has this coil. And every engine builder is puzzled that the engine has a cast iron flywheel on a racing engine.