If you bought a new LSD what ratio would you choose for Autox |
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11-15-2018, 07:18 AM | #1 |
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If you bought a new LSD what ratio would you choose for Autox
I am thinking about a Wavetrac LSD and maybe a gearing change. What would be sensible gearing for a stock engine MT car that is mostly 99.9% street driven daily driver, but lightly autocrossed, 1 or 2 track events a year. I am keeping the car forever. Thx
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11-15-2018, 08:36 AM | #2 | |
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I got my Wavetrac from Dan Fitzgerald at diffsonline.com. While I was already pretty sure the 3.08 wouldn't need to be changed (I used the gearing calculator on Dan's site: http://diffsonline.com/images/GearingCalculator.xls), I asked him what he thought based upon my running three track days a year with the rest being street use. Dan recommended staying with the 3.08. Dan knows this stuff inside and out - it might be worth contacting him for more specific advice. Update: Here's another online gearing calculator, from Tunnell Racing. This one has an advantage over Dan's calculator in that you can edit it: http://www.tunnellracing.com/gearcalc.xls . I used this capability to add a graph to make it easier for me to see what the RPM drop would be when shifting at different RPMs.
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2017 M240i: 23.8K, 28.9 mpg, MT, Sunroof Delete, 3,432#, EB, Leather, Driving Assistance Package, Heated Front Seats | Sold: E12 530i, E24 M635CSi, E39 520i, E30 325is, E36 M3 (2)
TC Kline Coilovers; H&R Front Bar; Wavetrac; Al Subframe Bushings; 18X9/9½ ARC-8s; 255/35-18 PS4S (4); Dinan Elite V2 & CAI; MPerf Orange BBK; Schroth Quick Fit Pro; GTechniq Crystal Serum Ultra Ceramic; Suntek PPF Last edited by dradernh; 11-16-2018 at 03:22 PM.. |
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