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

[Paul L Fisher]

The big wheels on a TDI is rare. Most of them are trying to squeeze the last
MPG and the last mile out of every tank. There are SOME performance people
but not many.


Paul L Fisher

'99 Ford Taurus SHO Toreador Red Clearcoat Metallic 65K - Kirk'ed 2/29/04
 
 - Amsoil Two-Stage Air Filter - TS-124
 
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 7:35 PM
To: Paul L Fisher
Cc: shotimes@autox.team.net
Subject: RE: [Shotimes] Questions about wheel diameter effect on fuel
economy and acceleration

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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