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DRR Sportsman |
First attempt at using radials, and also have never run a small tire anything. What ballpark tire pressure would be a good starting point on these 28x10.5 PBR’s on a 3300+ lb ladder bar car. 6.30’s expected et. And for those running radials any pressure difference between footbrake and transbrake launches? The Pull-Out....for when you want to work smarter, not harder!!! | ||
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DRR Trophy |
I've tried 15-20 psi with no difference. My car is a little heavier and a lot slower though. Most end up in the same range. | |||
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DRR Trophy |
When I switched to radials a while back, I was told to run around 20 psi or so. make a pass and check tires wear pattern. Keep lowering pressure until you get a wear pattern across the entire width of tire, or as close to it as you can get. I believe I ended up around 15 or so. Been 5 years though so my memory isn't that great. I'll have to re-learn it once i'm back together this season. William Kilduff 1970 Barracuda 1968 Camaro X2 1968 Caprice 1964 F100 | |||
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DRR Trophy |
I ran Hoosier 30 10 15 radial 17psi on a 67 Camaro running low 6:70s slapper bars best tire I used on that car | |||
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DRR Sportsman |
Thanks guys, Guess we’ll give them a shot probably start around 18 and see what happens. The Pull-Out....for when you want to work smarter, not harder!!! | |||
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DRR Pro |
Never less than 16 here. "Despite the high cost of living, it remains popular." Dave Cook N375 | |||
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DRR Pro |
We run 20 with no problem. 6.50's at 3400 lbs Mark Whitener RFD Heads FTI Converter Fab Shop Headers Home built 2 circuit Dominator :-) www.racingfuelsystems.com ____________ Good work isn't cheap and cheap work can't be good. | |||
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DRR Sportsman |
28"x 9" PBR on 8" rim 18 to 19 lbs. Light to medium burnouts....got approx 400 runs out of them footbraking with very even wear. Most important, keep the shiny side up | |||
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DRR Sportsman |
Weather permitting we’ll give it a shot Friday night. Hopefully the weather will cooperate and all of the little issues i’ve found just checking over this car have been corrected.This message has been edited. Last edited by: Stephen Hughes, The Pull-Out....for when you want to work smarter, not harder!!! | |||
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DRR Trophy |
3700 pounds, ladder bars/coilovers, glide, 29.5/10.5 PBRs on 8” wheels. Run 18-19 psi most of the time. The harder I hit them, the better they seem to work. Good luck! | |||
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DRR Trophy |
More so than tire pressure is to watch your wheel speed at launch 65 Malibu 3150# 9" 4L65 LS3 Full steel car. | |||
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DRR Sportsman |
Finally got a chance to test the Malibu and initial test runs at 18 psi ran a 6.29 with a 1.338 60’ leaving at 2800 rpm off of the trans brake. It only ran 105 but it ran out of gear and was hitting the chip in the lights. Engine’s peak power was at 6200 and high side is set at 7100. Gonna make a step down in gear ratio, but all in all I was pretty impressed with these 28 x 10.5 Pro Bracket Radials.This message has been edited. Last edited by: Stephen Hughes, The Pull-Out....for when you want to work smarter, not harder!!! | |||
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