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FCB tech ?'s

This is a discussion on FCB tech ?'s within the Technical forums, part of the Caferacer.net Forums category; yeah, its kind of its own early version of a stepped header! jc jc aaron, send my wheel....

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Thread: FCB tech ?'s

  1. #31
    Moderator joe c's Avatar
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    yeah, its kind of its own early version of a stepped header!

    jc

    jc


    aaron, send my wheel.




  2. #32
    Moderator jbranson's Avatar
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    Yeah, someone told me once that OEM pipes were double layered. I'd figure two layers of maybe 16ga? That's Down to around 1.25" ID.
    So yeah baby...that would work.

    I typically build .049 wall headers...been using .060 lately. That's a 1/8th off the OD. Typically when a tuner quotes you an OD, they are assuming .049 (18ga) to .060 (16ga).

    But yeah...by all means, stock head pipes if they are double thick.

    I will differ with you on the heat issue...takes more heat to heat more metal..that heat must come from the exhaust gases. So during off throttle time, the pipe cools, not as much because it's thicker, but also takes longer to heat up when you go WOT...so it's typically a wash. (although an air gap would help a lot) The super trick setup is very thin walled head pipes with wrap...heats up very fast because it's thin, stays very hot due to the wrap...best of both worlds....except for fact you'll trash a set of head pipes in one or two seasons due to acclerated corrosion. I guess that's what you are suggesting with cutting off the outer layer and wrapping....yeah, another good idea.

    Mike when it comes to the specifics of a 350 I'll have to defer to you, you have way more experience with them than I do.
    JohnnyB



    Edited by - jbranson on Apr 04 2007 10:52:23 PM

  3. #33
    Moderator ROSKO's Avatar
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    Thanks for all the input and info fruitcakes! As you may gather from the type of questions I'm wrapping things up for the track day. Once, twice, three times over, safety wired, yadda yadda. Just going over my punch list before I get some test runs in.

    It would be great to get some time on a Dyno... the owner of Celtic Racing said he'd run a CB on his dyno, dunno if I can afford it though. I should call.



    BORN TO LURK, FORCED TO WORK.
    www.NYCvinMoto.com
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  5. #34
    Moderator jbranson's Avatar
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    Might want to call Pete T. He runs a real casual shop in Mass. maybe 2 hours from you.
    Just be ready when you go to make basic changes like jets, timing, things like that. Typically about $100 for a couple of hours if he's not busy. Even if he doesn't find any more hp (which is rare) you will at least know you are in the ball park.
    JohnnyB


  6. #35
    Senior Member ttilghman's Avatar
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    thanks guys. i really appreciate all the ideas.

    rosko, let us hear how it goes...glad you'll be on grid this year.

    -tt


  7. #36
    Moderator ROSKO's Avatar
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    TT,
    Did you and soto do this test weekend yet? I'd like to get in on that.

    JB,
    Thanks for the info, once all the parts are where they should be I'll be ready to attempt 'tuning'... not quite ready yet. I'd like to meet Pete anyway.

    BORN TO LURK, FORCED TO WORK.
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  8. #37
    Senior Member ttilghman's Avatar
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    rosk0-

    pete's coming down friday evening to paint some eggs. alex will be around very early saturday to hide them. your welcome to come help me hunt for them anytime. i'll just have to leave sometime late morning on sunday to celebrate the grave robbers.

    call or email if you can make it or need directions.

    of course, you're welcome to come by anytime. just don't ignore what you've seen on this tread....there's not a lot of tuning the wanker group is capable of. but we'd be happy to strip some bolts and melt some aluminum. alex is great at making sure valves aren't tight, pete's become a real suspension guru and i have enough supertrapp disks to go skeet shooting. so there's all that, and i'm happy to tell you everything i've done to outbrake JnotD and Tex in T3.

    -tt


    -tt


  9. #38
    Moderator jbranson's Avatar
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    Are we talking about the same Pete....as in Talabach?

    JohnnyB


  10. #39
    Senior Member ttilghman's Avatar
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    jb-

    sorry, nope.... but you almost thought i was getting dead serious about a proper bike set-up. i'm flattered.

    i'm talking about pete casper. you know, the new racer from up by you. with ruffo's old 350...the now red, white, and eddie van bike. but i think rosko was wanting to meet pete t.


    -tt


  11. #40
    Moderator jbranson's Avatar
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    I love easter egg hunts.

    I like to hide in the grass with my nuts surrouned by fake green grass.

    JohnnyB


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