<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">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.<div><br><div><div>On Aug 28, 2016, at 10:36 AM, Barr, Scott wrote:</div><br class="Apple-interchange-newline"><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><br>I will try to remember to send you a gear calculation spreadsheet which I have on my computer at work...<br><br>Scott (B.)<br><br><br><br>Sent from my Verizon, Samsung Galaxy smartphone<br><br><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>-------- 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><br><br>Sent from my iPhone<br>_______________________________________________<br><a href="mailto:fot@autox.team.net">fot@autox.team.net</a><br><br>http://www.fot-racing.com<br><br>Donate: http://www.team.net/donate.html<br>Archive: http://www.team.net/archive<br>Forums: http://www.team.net/forums<br>Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/sbarr@mccarty-law.com<br><br><br>_______________________________________________<br>fot@autox.team.net<br><br>http://www.fot-racing.com<br><br>Donate: http://www.team.net/donate.html<br>Archive: http://www.team.net/archive<br>Forums: http://www.team.net/forums<br>Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/sjanzen@me.com<br><br><br></div></div><br></div></body></html>