[Shotimes] Questions about wheel diameter effect on fuel economy andacceleration

[Carl Prochilo]

Paul,  If people with your car say that, then maybe it's true.  I
would guess that the issue might be overall weight of tire/wheel
package you have versus the wider setup.  You might want to ask
about that specifically.

I recently did this very upgrade if you recall.  The weight of the
16x6" wheel and 215/60 tires on the stock slicers is about the same
as the new package I bought that had 17x7.5" wheel with 235/45
tires. The car is probably quicker at least at launch because the
wheels hookup better due to the wider contact patch.
-- 
Cheers,
Carl Prochilo
1992 Ultra Red Crimson

Paul L Fisher said:
> I did not mark this OT since this discussion is applicable to SHO's
> as well.
>
> Let's say my came stock with 195/65-15 wheels. Let's also say that a
> different trim level comes from the factory with 225/45-17, which
> have the
> same circumference (revs per mile).
>
> What would be your expectation as to affect on MPG and 0-60 times?
> Numerous
> people on the TDI list are saying that my dog slow TDI will become
> doggier
> and my MPG will drop 10%. I understand the whole rotating mass thing
> but
> wouldn't the increase in rim diameter (and mass) be offset by the
> decrease
> of mass of the tire?
>
> Paul L Fisher
>
> 1999 Ford Taurus SHO TR 65K - Stock. Kirk'ed.
>
> Visit my website: http://www.paul-fisher.com
> SHOClub Member: http://www.shoclub.com
> Amsoil dealer: http://www.paul-fisher.com/oil
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