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Old 03-26-2014, 05:55 PM
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Join Date: Jan 2007
Location: Melbourne, VIC
Cobra Make, Engine: Harrison, 6.0L Chev
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Quote:
Originally Posted by Tonus72 View Post
With an LS3, TKO and 3.27 diff (from memory the highest HSV non-LSD diff) how would that work out?
Here's a handy tool.

MFactory® Competition Products - Gear Calculator

Just plug in your tyre size (eg, 275/45 R17), 3.27 final drive, redline for LS3 is 6600 and ratios for one of the LS boxes in the link below. Drag your mouse over the graph to find RPM for a given speed and gear.

Gear ratios - Magnum 6-Speed Transmission

When you click calculate it uses the "query string" in the URL to store your settings - which you can then bookmark for later. Here's one example showing 1500rpm in 6th gear for the "TUET11009" variant.

Gear calculator for LS3 with 3.27 diff and Magnum TUET11009 box

97km/h at the top of 1st gear and a top speed of 408km/h, nice!
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