Shooter63
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| posted on 18/9/16 at 09:19 PM |
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What diff Ratio?
At the moment my car is running a 3.9 diff with 185/60-14 wheels/tyres, with the type 9 5th gear ratio this allows me to cruise quite nicely at
around 80-85mph without the engine revving it's nuts off.
My new tyres/wheels will be 195/50-13, obviously the revs are going to be quite a lot higher for the same speed, do you guys think it will be worth
changing to a 3.54 diff ratio or will this kill the acceleration
Shooter
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snapper
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| posted on 18/9/16 at 09:40 PM |
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If your running a 3.9 I assume from this its a Sierra diff therefore your next higher option is a 3.6 (3.54 is a live axle ratio).
There are some great gear ratio calculators that let you try different wheel/tyre/gear ratios
Much better than guessing
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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richard munnis
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| posted on 18/9/16 at 09:53 PM |
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Look up the Westfield speed calculator and just put in diff ratio tyre size gear ratios and it works it all out for you
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Shooter63
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| posted on 19/9/16 at 06:35 AM |
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quote:
Originally posted by richard munnis
Look up the Westfield speed calculator and just put in diff ratio tyre size gear ratios and it works it all out for you
Thanks for that, it seems the 3.54 diff will work perfectly.
Shooter
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