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Thread: BB or Porting

  1. #1
    fastkaz's Avatar
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    BB or Porting

    whats the diference between big bore and porting cylinders.. and which is the best to get?


  2. #2
    Moderator OsideBill's Avatar
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    Quote Originally Posted by fastkaz View Post
    whats the diference between big bore and porting cylinders.. and which is the best to get?
    Boring a cylinder changes it's displacement. Porting a cylinder changes how fuel and exhaust flow also affects timing. Best to get is both, if you are going to do the work do it all.

  3. #3
    Mik72e's Avatar
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    Talk to Lowell Horning for all you needs my opinion BB1390 ported.

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    Hydrotherapy's Avatar
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    Quote Originally Posted by Mik72e View Post
    Talk to Lowell Horning for all you needs my opinion BB1390 ported.
    +1, lowell will set your mind to rest if you have any questions and he keeps on answering them after he has returned your cylinders for fitting up..

  5. #5
    dhoad's Avatar
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    If you already have good 1300 cyls on your ski just get the porting done and raise your compression by cutting head. The cost of boring and replating plus new pistons adds up. Oh yeah, if you have not done it get the vf3 reeds.

  6. #6
    philip_gpr's Avatar
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    Guys, if I can respectively suggest, questions like this can easily be addressed on the forum. I don't think we should be referring simple questions like this to Lowell.

    Lowell is swamped with work and his health has been a bit of a problem lately.

    Yes if you have work that needs to be done please call Lowell.

    If it is questions like this the forum can provide a wealth of expertise to draw on.

  7. #7

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    fastkas, just depends on how much money and/or time you want to throw at it all at once. My first jump was to port the 1300. HUGE wakeup! ski will run 79+ in the heat. Funny thing about adrenaline, it soon takes more to do the job. I'm now ready to big bore, but still a little unsure as of HOW BIG to go.

  8. #8
    Grand Cayman Tanny's Avatar
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    When porting is it just the cylinders are getting worked on? what else is it need to be done?

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