Thanks Thanks:  0
Likes Likes:  0
Results 1 to 4 of 4

Thread: FF Nissan 90

  1. #1
    Team Member
    Join Date
    Feb 2012
    Posts
    17
    Post Thanks / Like

    Default FF Nissan 90

    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!

  2. #2
    FFX-61
    Join Date
    Aug 2005
    Location
    Stellwagan Ledges
    Posts
    1,389
    Post Thanks / Like

    Default

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

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

  3. #3
    Team Member
    Join Date
    Feb 2012
    Posts
    17
    Post Thanks / Like

    Default

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

  4. #4
    Team Member
    Join Date
    Nov 2008
    Location
    Horseshoe Bend, ID
    Posts
    657
    Post Thanks / Like

    Default Porting bit Yam

    Quote Originally Posted by cdixon4950 View Post
    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

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 40 nissan
    By cdixon4950 in forum Technical Discussion
    Replies: 4
    Last Post: 02-15-2012, 07:03 PM
  2. "Thunder Cat" Cleaver prop pitch for Nissan D 50hp Short Shaft
    By sandkicker in forum Mini Boats and Mini Boats History
    Replies: 11
    Last Post: 02-04-2008, 04:14 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •