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post #1 of 4 (permalink) Old 05-09-05, 11:52 PM Thread Starter
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diff ratio

Afternoon all
Just a question about diff ratios.

Car is a stock 1969 XW 351windsor auto. Diff ratio at the moment is 3.25.

If you change the diff ratio to say a 3.5 or even 3.7 you obviously get better take off. My question is do you also get a better 1/4mile time or does the car rev out before the finish line and thus risk an even worse time???

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post #2 of 4 (permalink) Old 05-09-05, 11:58 PM
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Re: diff ratio

all depends what you want. do you want a faster take off? or a quicker e.t? myself i would start at the motor and box first then the diff.

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post #3 of 4 (permalink) Old 05-10-05, 05:20 AM
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Re: diff ratio

turbocharge it and you will love your 3.25's
post #4 of 4 (permalink) Old 05-10-05, 06:41 AM
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Re: diff ratio

No pretty sure you wont rev out the car b4 the finish line. A friend of mine put 3.9s on his XW and got heaps better 60ft time (but that was with a 3 grand stall!!)

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