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Is it safe to dyno with winter rubber on the car? I'm running Bridgestone Blizzak LM22s....

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Old 01-23-2006, 05:29 AM
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Default Is it safe to dyno with winter rubber on the car? I'm running Bridgestone Blizzak LM22s....
They are stock size (225/45/17).

The tires are H-rated (so up to 130mph)....I believe redline in 4th on a stock tranny is 130mph.

So, I should be OK because the car should only be rolling at 130mph for an instant.

Anyone have any thoughts on this? I'd rather not swap to summer tires (in Chicago) just to drive down to a shop for a dyno run.
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Old 01-23-2006, 05:41 AM
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As long as they are round, I don't see a problem. Might lose a couple HP though.
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Old 01-23-2006, 05:55 AM
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Sure. I've been dynoing on my M2s. Do the pull in 3rd gear if you're worried.
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Old 01-23-2006, 06:09 AM
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how would you lose a few HP?
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Old 01-23-2006, 06:16 AM
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Default thanks - I'll do the normal 4th - I've heard the max speed rating is sustained speed.....
I don't think the car will blow-up when it hits 130mph....even so, I'll stand back
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Old 01-23-2006, 06:17 AM
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Default ditto -just curious how the numbers would be different? I'm certainly not trying to turn the dyno..
day into a contest. I'm really just curious what the car puts out compared top similar cars dyno-ed the same day on the same dyno - - and...it's cheap - $75 for 3 pulls.
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Old 01-23-2006, 06:27 AM
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I wouldn't worry about it.
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Old 01-23-2006, 06:27 AM
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I said that assuming that his winter setup was heavier.
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Old 01-23-2006, 06:56 AM
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Vrated is 149 MPH. Hrated is 130. my lm25s are Vrated, aren't the lm22s?
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Old 01-23-2006, 06:58 AM
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LM22s are H-rated
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