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Old 09-01-2016, 07:39 AM
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Lee Lee is offline
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Join Date: Dec 1999
Location: Crosby, TX (East of Houston)/Texas/USA
Posts: 2,108
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Quote:
Originally Posted by Will View Post
You're definitely going fast enough. From what I've seen you'll actually MPH a little higher with wheel spin than when you hook up. I think it's because the spinning wheels act like a loose torque converter and allow the engine to stay in a higher RPM band until the car really gets moving.

I bet some simple changes will allow you to hook better. I was getting high 1.6x to low 1.7x 60' times on street tires and running high 12.60s to low 12.70s @ 106-107 MPH with all poly bushed stock suspension and Koni shocks.

For a burnout I smoked them as hard as I could. More heat helped. Dunno if it would be the same with DRs.
I've ran several sets of 275/60-15 drag radials (BFG, M/T, and Goodyear) on two different cars, and have a stack of 1.5x 60' times. Tire pressure is typically at 24-25psi.

For the burnout I have one of the sideview mirrors set to where I can see the smoke coming off the tire. When the smoke density turns from "light" to "dense" I ease off the throttle and end the burnout. Goigg any longer is just throwing away tire life. Get them too hot too often and seem like they turn hard and offer less traction. Usually stage somewhere around 2000rpm, then flash the converter a little.

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'73 T/A (sold). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 317rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'.

'67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust