Originally Posted by Hotrod Lincoln
Why does an HEI system need a wide gap?
Jerry

HEI puts out a higher voltage spark. Able to jump a larger gap. Longer spark has to be part of the reason why HEI helps the fuel to ignite easier and burn better in the cylinder.

When car companies went to HEI they greatly increased the spark plug gap. Jeffrey

Last edited by 32vld; 07/20/2015 4:23 AM.