Originally Posted by B-Eazy
I just got my 91 integra, I was planning on putting a vtec head on it. I heard that it can cause problems in the bottom end, how likely is it? How much would it cost? How long would it take if I had an experienced mechanic do it for me? Thank you
B Eazy
the most common problem is over reving the block.
if you're not planning to upgrade the block, then keep the revs safe (at the sacrifice of performance).
I personally wouldn't go more than 7800rpm on a good condition LS block.