Found a nissan 90 for really cheap running. Fast Fred, I was wondering if you anyone you know ever ported one of these big cube motors?? 77cu is alot!
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Found a nissan 90 for really cheap running. Fast Fred, I was wondering if you anyone you know ever ported one of these big cube motors?? 77cu is alot!
:), does it have the divider in the sided transfer ports? is there a exhaust re-leaf hole in the cyl wall? :cool:
I am assuming that is does. I will try double check tomorow.
No problem - I've exhaust and finger ported one Yam 90, one 70, and one 50. All run very stout once you port and run the compression back up. With high porting, a custom head must be built (best), or weld up the chamber on the existing head and re-shape: Problem is the aluminum doesn't weld very well and you end up with pocks. Looks bad, but the engine doesn't seem to care....Quote:
Originally Posted by cdixon4950
Tim