Originally Posted by
91Notch
Ok let me go back and rephrase my first post....
File fit rings will always out preform pregapped rings if done properly!
While there is some hp to be had with the ring gaps I find 100 hp a little hard to chew. You serioulsy have to ask yourself though: How correct was the ring gap with the pre gapped rings? EXACTLY
For a modified engine IIRC the rule of thumb to determine the ring gap is:
The top ring should be .0045 to .005 inches times the bore size
And for the second ring is should be .0055 inches times the bore size.
Whats the differance if you find a pre gapped ring at those specs or you file them yourself?
if i can find rings with a top end gap of .018-.020 and 2nd ring of .022 then i would buy them and then check to make sure. im going to look for the book, like i said im not sure it was exactly 100 but it was a big difference