Jay k
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| posted on 8/6/07 at 09:42 AM |
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What Diff shall I fit?
Hi All, I am new to the kit car world so bear with me on this one.
I am building an MK indy with a 929 blade engine for summer road use.
I have the choice of 2 diffs to fit. Both are open 7" sierra diffs - ratio's 3.38 and 3.92.
I have been trying to find a gear calc that gives me accurate figures but with no great success. Can you tell me which would be the best diff to use
and also if anyone has a link for a decent gear calc.
Thanks in advance
Jay K
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graememk
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| posted on 8/6/07 at 09:50 AM |
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3.38 imho
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mookaloid
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| posted on 8/6/07 at 09:50 AM |
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I think most of the BEC boys would fit the 3.38 for more relaxed cruising. The 3.92 would give you something like 70 mph at max revs in top - but
would get there very quickly
Cheers
Mark
"That thing you're thinking - it wont be that."
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nitram38
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| posted on 8/6/07 at 09:53 AM |
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Doesn't that also depend on what wheels/tyres you are using?
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Jay k
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| posted on 8/6/07 at 09:55 AM |
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Going to fit 17"s
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nitram38
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| posted on 8/6/07 at 09:58 AM |
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quote:
Originally posted by Jay k
Going to fit 17"s
And tyre profile?
It all affects the circumference and hence your speed.
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goodall
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| posted on 8/6/07 at 10:03 AM |
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gearcalc
thats a good one as far as i can see, takes into a count the wheels as well and gives compound gearratios
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Jay k
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| posted on 8/6/07 at 10:55 AM |
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3.38 it is then
goodall thanks for the gear calc - spot on!!
Cheers chaps
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