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Old 08-04-2011, 11:17 AM   #41
Bwinkelsas
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Yes ^^ i could never imagine trying to use the 24.5 on the motor even my 23's @ 15psi and no burnout were almost hard to spin. i think a 22 would be perfect for any na focus or escort.
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Old 08-04-2011, 11:48 AM   #42
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I like the avatar bryan :)
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Old 08-04-2011, 12:12 PM   #43
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Check my main profile picture too, both are from last friday still waiting on the video :/
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Old 08-04-2011, 12:31 PM   #44
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now you made me change my avatar
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Old 08-04-2011, 12:55 PM   #45
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haha nice!
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Old 08-04-2011, 03:51 PM   #46
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I'm talking street tires though.
Slicks I can completely understand, being the grip ratio is far far far superior to crappy streets.

But the point I was getting at is that even though the smaller tire lets you RPM up faster (which is what a lower gear ratio is designed to do), you are still falling to the same RPM during shifts.
If you look at how far, in feet, you traveled, even with RPMing up slower you're still going further.


So the only explanation I can fathom is that rotational weight plays a huge part. Being a taller tire weighs more it takes that much more power at speed to turn it, which effectively lowers your power output, a parasitic loss basically.
So if you could find a taller tire that is the same weight (or lighter) then my figures should be true.

And I know there's a ton of real world stuff missing from the math. I'm just trying to understand why the math isn't even close to your guy's real world experience.
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Old 08-04-2011, 05:00 PM   #47
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its the gear ratio that mostly makes the difference, rotational mass can play into effect but not nearly as much. gear ratio multiplies the torque output of a motor.
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