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Mike, when I ran an overdrive, I was running a 4.11 rear end. Without
it, I run a 3.8 (Ford diff), and have seen 6300 or 6400 at the end of
the straights, but that's a really hot lap. I normally peak at 6100 or
6200. 3.7 would be somewhat better, 3.5 I've not tried but should keep
you under 6K.
Regards, Tony Drews
On 3/1/2023 9:24 PM, Michael Deweerd via Fot wrote:
> Amici, For the kastner cup Race at Road America what would be the
> ideal rear end ratio for a TR4? Last time (2013) it seemed I could
> have used a lower ratio?
> Would a 3.50 be the better choice over the 4.10 I have in the car now?
> I Redline at 6000 RPM.
> --
> /Mike Deweerd/
>
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<p>Mike, when I ran an overdrive, I was running a 4.11 rear end.Â
Without it, I run a 3.8 (Ford diff), and have seen 6300 or 6400 at
the end of the straights, but that's a really hot lap. I normally
peak at 6100 or 6200. 3.7 would be somewhat better, 3.5 I've not
tried but should keep you under 6K.</p>
<p>Regards, Tony Drews<br>
</p>
<div class="moz-cite-prefix">On 3/1/2023 9:24 PM, Michael Deweerd
via Fot wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAHAH3R7uPiei8GwtPUQc-iPcMr6qb0ibdgjHmU+ce8jdYHX8nw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Amici, For the kastner cup Race at Road America
what would be the ideal rear end ratio for a TR4? Last time
(2013) it seemed I could have used a lower ratio?
<div>Would a 3.50 be the better choice over the 4.10 I have in
the car now?<br clear="all">
<div>I Redline at 6000 RPM.  </div>
-- <br>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">
<div dir="ltr"><i><font face="comic sans ms, sans-serif">Mike
Deweerd</font></i></div>
</div>
</div>
</div>
<br>
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