TR tuning???
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TR tuning???

  1. #1
    Senior Member sandeggo's Avatar
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    Default SBC TR tuning???

    Ok so at the beginning of the season the boat ran good, its great off the line, but when I wanted to go full throttle it bogged a little and would clean up. When it would clean up, it had a lot of power and picked up rpm quickly.
    Now that its hotter I cant give it full throttle. On the top end I try to give it full pedal and it lays over and bogs. I know its rich. Everything else besides wot is great. Fires easy, idles great.
    Last Saturday we had some cool weather and it went back up to frosting the manifold a little, still couldn’t get it to full throttle but it was better.
    I've tried to change the pump cams to the 2nd hole but didn't see a difference. Also I'm all the way down to 87 octane.
    My plan is to bring a vac gauge with me on Thursday and get the vac at idle and WOT.
    Should I tackle power valves or jetting first?
    6.5 PV I want to say 65 jets all around (not sure).
    Give it more timing? Currently at 34*idle is set at 1200rpm max rpm seen was 5300.
    Vac advance dizzy, plugged. Pertronix msd blaster 2
    355 10:1 hump heads with 2.02's
    Weiand TR with 450 Holley’s
    Anyone ever had a similar setup and remember the jet, squirter and PV sizes you had success with?
    Last edited by sandeggo; 07-27-2010 at 12:20 PM.

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    Have you checked your' fuel pressure at wot?

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    Senior Member sandeggo's Avatar
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    Quote Originally Posted by Burnt Sticks View Post
    Have you checked your' fuel pressure at wot?
    no i havent. i will this weekend and i also plan on putting a vacuum guage to it.

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  6. #4
    SLOW MEMBER slowboy's Avatar
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    A bogging when you hit WOT is sometimes caused by not getting enough fuel. I would probably try installing a larger "squirter" and see if it helps. Pretty easy to try.
    WORK HARDER, MILLIONS ON WELFARE DEPEND ON YOU.

  7. #5
    Senior Member sandeggo's Avatar
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    Quote Originally Posted by slowboy View Post
    A bogging when you hit WOT is sometimes caused by not getting enough fuel. I would probably try installing a larger "squirter" and see if it helps. Pretty easy to try.
    I can flat foot it out of the hole and not have any issues, it's only when trying to go full speed. Could that still be lean? I know I have alot of missing info here and I'm gonna try to get more info this weekend

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