FF Nissan 90

[cdixon4950]

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!

[Fast Fred]

:), does it have the divider in the sided transfer ports? is there a exhaust re-leaf hole in the cyl wall? :cool:

[cdixon4950]

I am assuming that is does. I will try double check tomorow.

[Tim Kurcz]

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!

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....

Tim