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

[Paul Nimz]

I had steel winter wheels and they had to weigh at least 5 lbs more than the
slicers.  No way would I go that route again.  I have some old not so pretty
GEN 3 chromies if you want.

Paul Nimz
'97 TR
'93 EG mtx


----- Original Message ----- 
From: "James F. Ryan III" <av8r567@optonline.net>
To: "Paul L Fisher" <sho@paul-fisher.com>; <shotimes@autox.team.net>
Sent: Friday, May 07, 2004 6:42 PM
Subject: Re: [Shotimes] Questions about wheel diameter effect on fuel
economy and acceleration


> When the UPS guy brings my tires from TireRack, they usually shrink-wrap 2
> tires together.  I can throw those "bogeys" up the stairs, down the
stairs,
> into the the garage, and toss them into the trunk (so I can get them
> mounted) with no problems.  Once the tire is mounted on the slicer I
> wouldn't exactly say that I can "throw" them around anymore (I'm 6'1",
> 195lbs AND I play ice hockey).
>
> If your stock wheels were steel and the new, larger wheels were aluminum,
> the increase in the amount of metal is most likely offset by the fact that
> it's a lighter metal and it probably wouldn't affect mileage/performance.
> But if your stock wheels are alum (which I suspect they are on your TDI)
and
> your new, larger wheels are also aluminum - you're adding more metal.
And,
> metal will always weigh more than rubber - except on the moon.
>
>
>
> ----- Original Message ----- 
> From: "Paul L Fisher" <sho@paul-fisher.com>
> To: <v8sho@v8sho.com>; <shotimes@autox.team.net>
> Sent: Friday, May 07, 2004 5:15 PM
> Subject: [Shotimes] Questions about wheel diameter effect on fuel economy
> and acceleration
>
>
> > 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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