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Dynoing with slicks? HP loss?

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Old Mar 27, 2005 | 09:22 AM
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Default Dynoing with slicks? HP loss?

Just curious to what people have ACTUALLY OBSERVED in changing from say...17 inch SS rims and tires to some 28 inch ET drags.
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Old Mar 27, 2005 | 07:08 PM
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gained 25rwhp, yes that was changing ON the dyno. from 17X11" SS 5 spokes to 28" Drags.
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Old Mar 27, 2005 | 07:31 PM
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so you gained hp with the slicks over the SS rims?
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Old Mar 27, 2005 | 07:36 PM
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Originally Posted by 383ss
gained 25rwhp, yes that was changing ON the dyno. from 17X11" SS 5 spokes to 28" Drags.
damn thats unimaginable, what a great peice of info.
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Old Mar 27, 2005 | 07:53 PM
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I could be wrong but if the slicks weigh less it should allow more power to the ground, less rotating mass, should be more power.
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Old Mar 27, 2005 | 07:56 PM
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this is truely a tough question. weight is the issue, but what you have to look at is psi of the slick. if there is tons of resistence on teh dyno with a slick at 15 psi versus 30+ psi that will make a huge difference.

383ss is the only instance where i have seen someone gain that much from slicks. most loose.

ofcourse i could do a dyno the same day with stock wheels versus my slicks. just let me know.
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Old Mar 27, 2005 | 09:06 PM
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Originally Posted by 383LQ4SS
so you gained hp with the slicks over the SS rims?

yup. I could harldy believe it myself. 30psi in the slicks.
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