> my old green car may have been an ex-auto and had a 3.9 diff. im
also looking
> to reclaim some acceleration lost through fitment of the 15s and
use of the
> 3.7 in this car!
Zac,
With 15" wheels and the most commonly used tyres which is 195/50
series the overall gearing is lowered (better accel) by about the
same amount (4-5%) as using an extra tooth on the ring gear; I'll
explain with an example - say you have a 3.7 with 195/60x14 and
then you fit 195/50x15, the overall gearing is the same as going
from a 3.7 to a 3.9 and sticking with 14's. The size in the 15s
that's all but the same gearing as the 14s is 195/55x15 but these
are hardum obtanium so it seems, 205/50x15 are guard and
suspension rubbers. This is why i don't like 15s much and i know
you've read all the techobable on the 'other list' as to why 14s
are sweet on a 510 and why most of the racers use that size. In
Aus we prefer good brakes over a must have tyre size so i learn to
live with non-optimum gearing as long as the bugga stops good. (:-
anyhow i digressed a little
regards,
--
Terry
"You win some, you lose some, you wreck some."
Dale Earnhardt
> To: Terry & Heather <[EMAIL PROTECTED]>
> From: "Zac Campbell" <[EMAIL PROTECTED]>
> Subject: Re: 240k AUTO diff
> Date: Sun, 16 Apr 2000 20:43:59 +0950
> -----
> I'm not really looking for a diff, just wondering if there were
rarish ratios
> in the auto 180b and 240k seeing as I saw them both at the same
u-pull. I
think
> my old green car may have been an ex-auto and had a 3.9 diff. im
also looking
> to reclaim some acceleration lost through fitment of the 15s and
use of the
> 3.7 in this car! won't bother if it will cost me >$100 though.
>
> cya,
> zac
>
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