What stall would you use

Discussion in 'Race 400/430/455' started by alaskagn, Feb 7, 2023.

  1. alaskagn

    alaskagn Well-Known Member

    Hi. Just wondering what stall most of you racers would suggest on this motor? I understand a stall is different on every motor and it’s just a # bit about to order a new carb and builder is asking about it. thanks.
     
  2. alaskagn

    alaskagn Well-Known Member

  3. BQUICK

    BQUICK Gold Level Contributor

    I always like to lean toward lower stall so locks up better on top end and you can feel shifts. I run a 4200 ATI 8in. May not leave as hard as a 4500-5000 but easier on parts and less likely to spin if track goes away. But some people only race a couple times a year and want to show off....then run a 4800-5000....closer to your peak torque.:D

    Side note: wonder why oil pressure going down on top end?? I like to see 80 at 6500.
     
    Last edited: Feb 7, 2023
    alaskagn likes this.
  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    500 RPM below peak torque, so, about 4500. It's a Race only motor?
     
  5. alaskagn

    alaskagn Well-Known Member

    Thanks for the reply Larry...Yes, mostly a drag car only. Might drive it to the track about 15 min up the highway once on a Friday night to show some "Street Cars" what an old Buick will do on the no prep class they started doing. But it's mostly a bracket car for Sunday drags.

    Thanks for the reply. That is what I was thinking myself..around 4200-4500.
    We did get the oil pressure figured out. Needed to build a custom windage tray for the SRE Pan. Now running about 90 lbs at 6500..
     
  6. Bens99gtp

    Bens99gtp Well-Known Member

    If you flashed 4000-4500 i would think you would like the results. But I would want to stay with a 9.5 or 10" core.

    Is this a foot brake setip
     
    alaskagn and sean Buick 76 like this.
  7. BQUICK

    BQUICK Gold Level Contributor

    I like tight 8in due to being alot lighter than 9.5 or 10in. Less weight on crank....good thing for our motors.
     
  8. BrianTrick

    BrianTrick Brian Trick

    Rear gear?
     
  9. Tom Righter

    Tom Righter Well-Known Member

    What does the car weigh?
     
  10. Bens99gtp

    Bens99gtp Well-Known Member

    For a light car i would argue, but you can't the multiplication factor as well out of small diameter converters. Sometimes size matters no matter what she supposedly said
     
  11. BQUICK

    BQUICK Gold Level Contributor

    Why is that? Seems to work well in my 3700lb GS. Tightest 8in that ATI makes.
     
  12. Tom Righter

    Tom Righter Well-Known Member

    Whoever use just make sure it’s a company that is familiar with Buick. Torque characteristics fill out a spec sheet with as much information as possible. A good converter is not cheap!I prefer Coan,they steered me away from an 8 inch converter and recommended their 10 inch. A little extra weight will help with a heavy car giving more inertia.
     
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  13. BQUICK

    BQUICK Gold Level Contributor

    Gave ALL info on Jag to ATI and they said it would run low 11s when it was running 9.70s. So much for computers....
     
  14. 12lives

    12lives Control the controllable, let the rest go

    Must be the driver!!!
     
  15. hugger

    hugger Well-Known Member

    I tried Coan,..ATI,..and Ultimate with my orange car,...none of them would 60ft for ****,...used a local guy out of Asheville Gregg,.. he's no longer in bizz,..but his verter,...spot on 1.44 first time out,...so I wouldn't get too caught up in the who's who,...it's a crap shoot from my experience

    Guy from Coan I believe it was wanted to know if I had datalog info,...from a 10.80 car,...?? Nah bud I'm running a 25yrold Mallory box hahaha
     
  16. Tom Righter

    Tom Righter Well-Known Member

    I must’ve got one of the good ones. 1.27 footbrake.
     
  17. BQUICK

    BQUICK Gold Level Contributor

    Only 1.31 best for me with the 4200.
     
  18. Tom Righter

    Tom Righter Well-Known Member

    I know your car always runs well
     
  19. BQUICK

    BQUICK Gold Level Contributor

    THX....that was with 3.89 gear....now 3.50 and 1.36 60ft
     
  20. Tom Righter

    Tom Righter Well-Known Member

    you want to talk about a heavy converter 4l80e triple disc. The whole transmission I believe is 112 pounds heavier than a turbo 400 we’ll see. If I don’t like it it’ll be ripped out and sold!
     

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