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Good tires to use on the dyno for high HP cars

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Old 07-14-2009, 03:10 PM
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Default Good tires to use on the dyno for high HP cars

I'm tired of chewing up good soft race rubber on the chassis dyno. Anyone have experience with a tire that holds up well to dyno abuse at power levels above 800 or 900 RWHP? I was thinking sometning like an old Pro-Trac. They were pretty hard compound and had some heft associated with them.
Old 07-16-2009, 09:27 PM
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For safety sake I'd leave a stickyish tire on there.
Old 07-24-2009, 09:11 AM
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im with trust on this one
Old 07-24-2009, 02:13 PM
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Have the shop add more straps to the car to hold it down little better. But for over 900 leave the sticky tires on there. I had 800 with cheap hard *** street tires
Old 07-24-2009, 02:50 PM
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Originally Posted by BigRich954RR
Have the shop add more straps to the car to hold it down little better. But for over 900 leave the sticky tires on there. I had 800 with cheap hard *** street tires
We'll add some vertical straps to the dyno before I turn up the boost I was fine at 800 RWHP peak with 8 psig of boost. You can see with 12 psig where the tires start slipping at around the 800 mark and don't catch up till the end of the pull and even then you can't be sure. I'll keep with drag radials until I find something that works better.
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Old 07-29-2009, 03:14 AM
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Im a fan of the stickies
Old 07-29-2009, 02:12 PM
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We have had the best luck with used up drag radials. Also bias the car toward the front of the rollers so that when you are strapping it down, you are pulling it into the rollers. We also use straps to preload the suspension and use the springs to help drive the tires into the rollers, hence the use of radials...

We had wheelspin problems with the 402 F1 Procharged CTS-V we did a couple of years back and these tricks seemed to work well.

Shane
Old 07-30-2009, 09:45 AM
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Thanks Shane
Old 07-30-2009, 10:48 PM
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Find a shop with a dynapack dyno.. No need for tires.. everything bolts up to the hubs to remove both the tire slippage and stretch variables.
Old 07-31-2009, 06:43 AM
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A Properly strapped down car will eliminate alot of wheel spin. The dyno we use here in Marietta straps with 4 on the rear and 2 of them go directly over the axle for the added down pull. I have seen as much as 1500rwhp (maxed out dyno) in a viper with no wheel spin and using drag radials.




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