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<p class="MsoNormal">Dave: By my calculation, with a rear end ratio of 4.1, and a final drive ratio of .87, using 205/60/15 tires at 6000 rpm my car is capable of 123.65 mph in overdrive and 99 mph in 4<sup>th</sup>. My other gear ratios are no where near
those you spec. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> Fot <fot-bounces@autox.team.net> <b>On Behalf Of
</b>Dave Riddle via Fot<br>
<b>Sent:</b> Thursday, July 28, 2022 1:51 PM<br>
<b>To:</b> Dave Riddle via Fot <fot@autox.team.net><br>
<b>Subject:</b> Re: [Fot] What gear ratios are the TR3/TR4 folks running?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">This Gear Calculator confirms what we saw with the box that was installed and says he will have a higher speeds in all gears with the box that is going in<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><a href="https://racingdiffs.com/pages/gear-ratio-calculator">https://racingdiffs.com/pages/gear-ratio-calculator</a><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal">Plugging in the numbers from the gearbox used at PittRace it shows<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Tire width 205<o:p></o:p></p>
<p class="MsoNormal">Tire Profile 60<o:p></o:p></p>
<p class="MsoNormal">Rim Size 15<o:p></o:p></p>
<p class="MsoNormal">RPM 5000<o:p></o:p></p>
<p class="MsoNormal">Final Drive 4.63<o:p></o:p></p>
<p class="MsoNormal">1<sup>st</sup> Gear 3.95 20.07 mph<o:p></o:p></p>
<p class="MsoNormal">2<sup>nd</sup> Gear 2.14 37.04 mph<o:p></o:p></p>
<p class="MsoNormal">3<sup>rd</sup> Gear 1.38 57.44 mph<o:p></o:p></p>
<p class="MsoNormal">4<sup>th</sup> Gear 1.00 79.27 mph<o:p></o:p></p>
<p class="MsoNormal">5<sup>th</sup> Gear 0.81 97.86 mph<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Using the numbers from the box to be installed. Looks like a good direction<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Final Drive 4.11<o:p></o:p></p>
<p class="MsoNormal">1<sup>st</sup> Gear 3.83 23.31 mph<o:p></o:p></p>
<p class="MsoNormal">2<sup>nd</sup> Gear 2.06 43.35 mph<o:p></o:p></p>
<p class="MsoNormal">3<sup>rd</sup> Gear 1.43 62.44 mph<o:p></o:p></p>
<p class="MsoNormal">4<sup>th</sup> Gear 1.00 89.30 mph<o:p></o:p></p>
<p class="MsoNormal">5<sup>th</sup> Gear 0.84 106.3 mph<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif"> Fot [</span><a href="mailto:fot-bounces@autox.team.net"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">mailto:fot-bounces@autox.team.net</span></a><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">]
<b>On Behalf Of </b>Larry Young via Fot<br>
<b>Sent:</b> Thursday, July 28, 2022 7:43 AM<br>
<b>To:</b> </span><a href="mailto:fot@autox.team.net"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">fot@autox.team.net</span></a><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif"><br>
<b>Subject:</b> Re: [Fot] What gear ratios are the TR3/TR4 folks running?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Your original box gives you a high gear of 3.75, which is close to the standard high in a TR rear. I don't know how long the straights are at that track, but if<br>
you can't get over 95mph with that ratio, something else is wrong. I think your change will make things worse. - Larry Youmg<o:p></o:p></p>
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<p class="MsoNormal">On 7/27/2022 12:09 PM, Dave Riddle via Fot wrote:<o:p></o:p></p>
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<p class="MsoNormal">We struggled up the hills in the Baja TR3 at PittRace and topped out at 95 mph coming into T17, 87 mph into T1 and 82 into T3<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Lyman pulled the box that had been in the car from when it ran Offroad Events<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Toyota W59 <o:p></o:p></p>
<p class="MsoNormal">Rear axle is 4.63, with a Detroit Locker<o:p></o:p></p>
<p class="MsoNormal">Toyota W59 trans in car bad <o:p></o:p></p>
<p class="MsoNormal">1) 3.95<o:p></o:p></p>
<p class="MsoNormal">2) 2.14<o:p></o:p></p>
<p class="MsoNormal">3) 1.38<o:p></o:p></p>
<p class="MsoNormal">4) 1.00<o:p></o:p></p>
<p class="MsoNormal">5) 0.81<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">He is installing a Toyota W55 with the following ratios but obviously they can be changed<o:p></o:p></p>
<p class="MsoNormal">have a 4.11, also with a Detroit Locker<o:p></o:p></p>
<p class="MsoNormal">1) 3.83<o:p></o:p></p>
<p class="MsoNormal">2) 2.06<o:p></o:p></p>
<p class="MsoNormal">3) 1.43<o:p></o:p></p>
<p class="MsoNormal">4) 1.00<o:p></o:p></p>
<p class="MsoNormal">5) 0.84<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">We were running the Hoosier 205/60-15 24.5<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><a href="http://www.microworks.net/"><span style="text-decoration:none"><img border="0" width="191" height="80" style="width:1.9895in;height:.8333in" id="Picture_x0020_1" src="cid:image001.jpg@01D8A358.599B9E50" alt="MWLOGO-Signature"></span></a><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt">Dave Riddle</span></b><o:p></o:p></p>
<p class="MsoNormal">Business IT Consulting<o:p></o:p></p>
<p class="MsoNormal">Office: 480-610-8234<o:p></o:p></p>
<p class="MsoNormal">eMail: <a href="mailto:dave@microworks.net">dave@microworks.net</a><o:p></o:p></p>
<p class="MsoNormal">Website: <a href="http://www.microworks.net/">http://www.microworks.net</a><o:p></o:p></p>
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