Date:         Fri, 3 Mar 2006 15:07:12 -0800
Reply-To:     mark drillock <drillock@EARTHLINK.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         mark drillock <drillock@EARTHLINK.NET>
Subject:      Re: Power loss with 15" wheels?
Comments: To: Doug F <vanagon@ASTOUND.NET>
In-Reply-To:  <004401c63f11$98289c30$6501a8c0@ibmt23laptopdef>
Content-Type: text/plain; charset=us-ascii; format=flowed

Again there is a subtle effect from the 7% increase in tire size. The
odometer now records 7 miles per hundred FEWER than it did before for
the same miles actually driven. If you are using the odometer reading to
figure fuel economy you will get a drop in calculated mileage just from
the new error in the odometer. In a Syncro this results in a 1-1.5 mpg
change in calculated fuel use but not true fuel use. There may be a drop
in true mpg as well but unless you made allowances for the new odometer
error you won't know how much.



Mark

Doug F wrote:

>Running the SA 15" wheels with 215/75/15s on my 87 syncro with a stock 2.1L
>wbx have shown me that it has definitely hurt gas mileage and power.
>
>
>