<VV> more PG vs 4spd thoughts

[James Davis]

Tire wear of 9/32" on a 25" diameter tire is about 2.2% of the 
circumference or 60 rpm at 3,000 rpm engine speed.  The torque converter 
slip (the inverse of efficiency) is listed at 8%.  I find the slip of 
the torque converter pushing an UltraVan is 400 rpm @ 60 mph (3,450 rpm).
Jim Davis

Ron wrote:
> Yes, and that amount of slip is less than the variation from different 
> amounts of tire wear.  In other words, it's nil.
> RonH
>
> ----- Original Message ----- 
> From: "Matt Nall" <patiomatt at aol.com>
> To: <virtualvairs at corvair.org>
> Sent: Sunday, June 06, 2010 8:50 PM
> Subject: Re: <VV> more PG vs 4spd thoughts
>
>   
>