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Thread: Porting

  1. #1
    fastkaz's Avatar
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    Porting

    how is porting done? i always wanted to know what you do and how it is done and what tools are used?


  2. #2

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    Cool

    Ya and Iíd like to know how to change lead to gold, let just say even after all the mathematical number crunching many time itís still R&D -port a cylinder, try again
    BUT if you know your math- you end up dealing with stuff like time mean area, bmep (brake means horse power
    And after you start to finger that out, now how do I machine windows on cylinder to my #

    Anyways company called tsr has software that can crunch numbers for port timing and more

    Thereís some old time books out there two-stroke tuners handbook, by Gordon Jennings (old stuff but still good)
    And if nothing else just hang around here, lots of info goes by everyday

    Later cd

  3. #3
    fastkaz's Avatar
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    it sounds very difficult

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    dhoad's Avatar
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    try 2-stroke-porting.com
    look thru Lowell's info he has pics of port work

  5. #5
    Moderator OsideBill's Avatar
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    If you like to read this ite has some good info http://www.macdizzy.com/
    Also there is a great book called Two Stroke performance by A.Graham Bell on the net search and you will find it I do not have the link at the moment it was posted here a long time ago. I have the hardback and it is a great read.

  6. #6
    fastkaz's Avatar
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    thanks for the posts...helped alot

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    RUNWME's Avatar
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    on screamandfly.com for awhile there was a guy who had a sleeve ported out he would ship you. You slide it into your bore... line it up mark your cylinder with a sharpie and go to work. I think he charged 100.00 for sleeve rental fee....You could take your 200 2.5 to 300 hp porting specs for cheap Just dont let grinding tool slip and gouge your cylinder...... yes, i speak from experience DOH!!

    I wonder if any of the GPR porting gurus would consider doing this for those of us who like to tinker?
    Last edited by RUNWME; 10-22-2007 at 08:20 PM.

  8. #8
    Moderator OsideBill's Avatar
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    Here is the link to the online Two Stroke performance book a bit tough to read. http://www.scribd.com/doc/3258/A-Gra...ormance-Tuning

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    Moderator OsideBill's Avatar
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    TTT

  10. #10
    Pistonwash's Avatar
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    Quote Originally Posted by RUNWME View Post
    on screamandfly.com for awhile there was a guy who had a sleeve ported out he would ship you. You slide it into your bore... line it up mark your cylinder with a sharpie and go to work. I think he charged 100.00 for sleeve rental fee....You could take your 200 2.5 to 300 hp porting specs for cheap Just dont let grinding tool slip and gouge your cylinder...... yes, i speak from experience DOH!!

    I wonder if any of the GPR porting gurus would consider doing this for those of us who like to tinker?
    Not with the nikasil, I am scared to death at chipping those walls and making a monumental mistake. I'll let the Montana miracle worker do the dirty work. I have ported some wicked twins for power before..I have burnt up more pistons than anyone on this board too!

    I had a famous portsmith in the jetski industry tell me that my porting looked like a 5 year old using a drill to port.

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