Now these are TIRES !!!
Originally Posted by Mondo1
. . . Its the aspect ratio that is what Tim(and myself) is talking about. . . .
Originally Posted by Rick Zurzolo
Cliff
Do you make any computer adjustments for the overall diameter differential between the stock 295/45/18 versus your new Proxes with a height of 26.5 inch diameter? Does this difference affect rpm shift points or is the change negligible?Great video from Sebring, by the way!!!
Do you make any computer adjustments for the overall diameter differential between the stock 295/45/18 versus your new Proxes with a height of 26.5 inch diameter? Does this difference affect rpm shift points or is the change negligible?Great video from Sebring, by the way!!!
Originally Posted by Tim Skelton
Don't sweat it, Mondo. It will be clear to any reader of above-room-temperature IQ that Odin's Wrath is just trying to cover the fact that he posted before he engaged his brain.
If Mondo had written what he did the second time, instead of what he did the first, there would have been no room for interpretation. As it is, what you assumed was what he was trying to say. However, the diameter of the wheel, or the revolutions per mile, is what is needed for tuning shift points, not ride height or aspect ratio.
I know you're not stupid; but, neither am I. I can give you a run for your money in hard headedness, too. That's probably not a good thing.
Boy Cliff those tires are the nuts! Have FUN down at WV this comming weekend. Wish I could have gone this year but due to work I cant make it. But there are about 18 or 20 guys going from up here in New England and I think there are 2 Lightnings going down. I would have made 3. You were my instructor last year and we had a ball. Really wish I could have gone.
Chuck
Chuck
Originally Posted by Odin's Wrath
. . . I know you're not stupid; but, neither am I. I can give you a run for your money in hard headedness, too. That's probably not a good thing. 

Originally Posted by Odin's Wrath
That would be revs per mile.
Peace out.

So...that being said how much if any would that lower your final gear ratio. I have 3.70. So if any for the rest of us, does this have a noticable change? Smaller tires are like changing your 3rd member so to speak.
Yes, it would be a noticeable change.
But on most tracks, a good one. If you can't hit the top speed on a track in 4th, a shorter final drive (or shorter tire) will probably give you more torque/hp down where you can use it.
But on most tracks, a good one. If you can't hit the top speed on a track in 4th, a shorter final drive (or shorter tire) will probably give you more torque/hp down where you can use it.
Originally Posted by Mondo1
Wow!! Revolutions per minute or mile. Makes no difference.Its going to be more. I'm done here. Asdalavista!!

There is a difference. The revolutions per minute would be the same for any tire, at the same engine rpm, that you substitute. Revolutions per mile would increase with smaller tire diameters.
Hasta la Vista!
Originally Posted by twb02lightning
So...that being said how much if any would that lower your final gear ratio. I have 3.70. So if any for the rest of us, does this have a noticable change? Smaller tires are like changing your 3rd member so to speak.
With 3.73's the new ratio, with the shorter tires, would be the equivelent of installing 4.0:1 gears.
With my 3.55 rear end, I calculated the the ratio changes to 3.82 with the RA-1's which works well for a small track but for a larger track the 3.55 ratio works best and pulls hardest.(that's without RA-1's) That does not apply to drag racing of course. I compared this against a comparable truck with the 3.73 rear end. He couldn't believe how I could just walk away from him with the 3.55 and stock size tires.
But all around, I like the 3.55 with RA-1's. Its a pretty good compromise.
I believe that Stan is running 3.27 which is probably optimal for the power band on larger courses.
TB
But all around, I like the 3.55 with RA-1's. Its a pretty good compromise.
I believe that Stan is running 3.27 which is probably optimal for the power band on larger courses.
TB
Originally Posted by Odin's Wrath
There is a difference. The revolutions per minute would be the same for any tire, at the same engine rpm, that you substitute. Revolutions per mile would increase with smaller tire diameters.
Hasta la Vista!
Hasta la Vista!



