[Shotimes] Questions about wheel diameter effect on fuel economy and acceleration

[Carl Prochilo]

Nope, gas mileage is the same.  Not that my gas mileage is so great
these days.  Only getting between 250 and 300 miles per tankful. 
I'm 90% sure something's up with the gas tank.  Just need time to
pull it and check things out.

I take it the bigger wheel package is rare?  I would think that you
should be able to get some empirical data from that list.  But
anyway, I know gas prices are high, but if you wanted the bigger
wheels there is only two reasons I can think of to do this.
1)  You want the car to look better.
2)  You want the car to handle better.

Everything else is incidental.  ; )
-- 
Cheers,
Carl Prochilo
1992 Ultra Red Crimson

Paul L Fisher said:
> The people on the TDI list can't show any proof. All the proof is
> "I've
> heard" or "My cousin's nephew's sister thinks".
>
> Did you notice any change in mileage?
>
>
> Paul L Fisher
>
> '99 Ford Taurus SHO Toreador Red Clearcoat Metallic 65K - Kirk'ed
> 2/29/04
>
> SHO Club member http://www.shoclub.com/
> Check out my web site http://www.paul-fisher.com/
> Amsoil dealer http://www.paul-fisher.com/oil.htm
>
> -----Original Message-----
> From: Carl Prochilo [mailto:gr8sho@prochilo.myserver.org]
> Sent: Friday, May 07, 2004 4:56 PM
> To: Paul L Fisher
> Cc: shotimes@autox.team.net
> Subject: Re: [Shotimes] Questions about wheel diameter effect on
> fuel
> economy andacceleration
>
> 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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