Beadlock air pressure verse liners

Discussion in 'Manton Push Rods Top Alcohol Tech Questions' started by aafa760, Jan 15, 2018.

  1. aafa760

    aafa760 Member

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    Ok everyone with old liner 34x17 hoosier we would run lower pressure to increase hook. in85 or before.

    so my question is with new tires hoosier) beadlocks I get told more air will hook harder.
    so does less to increase wheel speed and lower the hook?

    I know a lot of other things factor in Engine pedal clutch verse crower glide engines rpm static on pedal clutch.

    but strictly tires more air harder hook with new generation tires? and beadlocks sure seem to squat more with out liners.
     
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  2. Mike Canter

    Mike Canter Top Dragster

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    Not sure what you are saying. Lower pressure does not increase hook. With lower pressure the tire contact cups so less contact in the middle so the tire spins more so you get higher wheel speed. How much pressure are you now running with what weight car?
     
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  3. aafa760

    aafa760 Member

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    Hey Mike thanks for responding.
    6.5 low and as high as 7.3 was thinking to try 7.8 or 8.0
    1971# FEd bbc blown 4:30 gear 1.92 low three speed two disk pedal 10”
    running 7.0 heritage series
     
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  4. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    I think you would be real happy with the newer style 17/34.5 Hoosier or even the 15/34.5. These are the narrower 'slipper' tires many Pro Mods use to get wheelspeed easier. I would say 6.5 needs to be your max air pressure on a 34.5 Hoosier and as low as 4.75-5 if you really want to spin the tire. Generally speaking you run more tire pressure with a beadlock to stiffen the sidewall. Many of the newer generation tires have stiffer sidewalls.
     
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  5. Mike Canter

    Mike Canter Top Dragster

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    I agree with Will. Exactly what I was going to tell you
     
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  6. nitrowannabe

    nitrowannabe Member

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    Are you getting ready to run the March Meet ? Very competitive class. Could you run a NTF tire ?
     
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  7. aafa760

    aafa760 Member

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    Will, Mike I totally blew tire size that is for our AA/FA, dragster has on it 33x15x15 Hoosier d05 tire
    So would that change your advice?
     
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  8. Mike Canter

    Mike Canter Top Dragster

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    I have never run those and can’t answer that question. I would be afraid to give you wrong info
     
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  9. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    As Mike said I haven't ran that tire but I wouldn't think you would need to bump the upper pressures more than .5 more than what we mentioned for the 34.5
     
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