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<div dir="ltr" data-setdir="false">As a point of reference, I checked some of my old results sheets, and I was turning laps in the 2:41s with an SCCA legal TR-4 with slick tires. This was 1989 - 1991, and I don't think the track has changed since then.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Jack<br></div><div><br></div>
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On Thursday, March 2, 2023 at 03:49:35 PM EST, Robert Lang via Fot <fot@autox.team.net> wrote:
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<div dir="ltr">Addendum: 4.10 and o/d and you might be okay. Just checked my calcs on this. But 4.10 and no o/d and you'll redline in a lot of places at RA<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Note: my assumptions are with 24 in tall tires on a TR6.</div><div dir="ltr"><br clear="none"></div><div dir="ltr">Also, I'm more concerned about chucking a rod or breaking the crank than how well I can pull out of any corner. So under 6k RPM is my rule of thumb.</div><div dir="ltr"><br clear="none"></div><div dir="ltr">Regards,</div><div dir="ltr">rml<br clear="none"></div><div><br clear="none"></div>
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On Thursday, March 2, 2023 at 11:39:15 AM EST, Robert Lang via Fot <fot@autox.team.net> wrote:
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<div dir="ltr">Road America is a high-speed track. You won't get under 3:00 with a 4.10. You'll be out of revs half-way down most of the straights. a 3.70 or 3.45 would be better choices. Gear for 115+ on the front straight, the back straight and the Kink to Canada.</div><div dir="ltr"><br clear="none"></div><div dir="ltr">Regards,</div><div dir="ltr">Bob Lang<br clear="none"></div><div><br clear="none"></div>
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On Thursday, March 2, 2023 at 03:39:29 AM EST, Michael Deweerd via Fot <fot@autox.team.net> wrote:
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<div><div id="ydp20bfead2yiv6775035405ydp7c2547dcyiv3402212990ydped3157aayiv2522124888"><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 clear="none"><div dir="ltr" class="ydp20bfead2yiv6775035405ydp7c2547dcyiv3402212990ydped3157aayiv2522124888gmail_signature"><div dir="ltr"><i><font face="comic sans ms, sans-serif">Mike Deweerd</font></i></div></div></div></div>
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