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<div>15 rims, 60 profile tires, 4.55 dif, OD = 3.7+\-, 6200 @ middle straight, same on back straight</div>
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On Aug 28, 2016, at 8:05 PM, "Scott Janzen" <<a href="mailto:sjanzen@me.com">sjanzen@me.com</a>> wrote:<br>
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<div>I've only been there for the Kastner Cup, 3.89 diff in my GT6, 7,000 RPM redline, and Scott is right - the main straight and the one back down are a long time at redline. That said, I found gearing elsewhere to be good, though I do run a close ratio TR6
box, so 2nd gear is really tall.
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<div>On Aug 28, 2016, at 10:36 AM, Barr, Scott wrote:</div>
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<div>Which tires? Roughly 22" diameter? I generally used a 3.89 there, but it's an awful lot of revs for a long time if you have no overdrive. I tried a 3.27 once, but the Spit didin't have enough grunt to pull that gear, and I was drag-limited to about
88 mph. Not ideal either. Maybe the GT6's additional torque would make the 3.27 gear work just fine.<br>
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I will try to remember to send you a gear calculation spreadsheet which I have on my computer at work...<br>
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Scott (B.)<br>
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-------- Original message --------<br>
From: David Amys <<a href="mailto:damys@charter.net">damys@charter.net</a>><br>
Date: 8/27/16 10:26 PM (GMT-06:00)<br>
To: <a href="mailto:fot@autox.team.net">fot@autox.team.net</a><br>
Subject: [Fot] Diff ratio for Road America<br>
<br>
-------- Original message --------<br>
From: David Amys <<a href="mailto:damys@charter.net">damys@charter.net</a>><br>
Date: 8/27/16 10:26 PM (GMT-06:00)<br>
To: <a href="mailto:fot@autox.team.net">fot@autox.team.net</a><br>
Subject: [Fot] Diff ratio for Road America<br>
<br>
Need advice on which diff to run at Elkhart. Our first time out. GT6 with mild motor. We have two diffs. 3:89 welded and 3:26 stock rebuild. Rev limiter set at 6,000.<br>
Thanks<br>
Dave and Alex<br>
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