Diff Gearing
10-31-2018, 11:11 AM
#1
Instructor
Thread Starter
Diff Gearing
Have an 06 M6 using the car mostly for street with some Drag Strip use. I have recently done headers and cam etc. and is now at 448 whp. I'm scared of rear diff problems so I'm considering RPM Transmissions kit to change out the rear. I plan to use drag radials in stock size 305/35/19 because I have a set of spare wheels for that. My question is what gear ratio should I put in it 342 373. 390. Or. 410
10-31-2018, 11:39 AM
#2
AMP Racing
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Location: Washington TWP NJ
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4.10 don’t fear the gear! I had them in my 6 speed car and loved them. Good for the strip and crazy fun on the street.
That said, unless you’re using the stock clutch, I would highly recommend using a bias ply tire.
That said, unless you’re using the stock clutch, I would highly recommend using a bias ply tire.
10-31-2018, 12:10 PM
#3
Instructor
Thread Starter
I'm just getting back into this from old school drag racing days. Not sure about the choice of bias vs radial deal. Also was planning to put in a new stock style clutch since I don't have any crazy power and low budget. Your thoughts?
10-31-2018, 12:23 PM
#4
AMP Racing
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Location: Washington TWP NJ
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2023 C5 of the Year Finalist - Modified
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St. Jude Donor '09-'10-'11-'12
The issue with aftermarket clutches, is that they typically grab harder. That induces wheel hop which breaks rear ends, axles, and transmissions.
The bias ply tire is a lot more forgiving in those instances. The downside of running a bias rear, is that you really need to run a bias front tire as well. Just added expense.
Best of success with your goals!
The bias ply tire is a lot more forgiving in those instances. The downside of running a bias rear, is that you really need to run a bias front tire as well. Just added expense.
Best of success with your goals!
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Fly N Low (10-31-2018)
