Different ratios

Standard & modified running gear

Different ratios

Postby mickm » Mon Nov 21, 2016 11:27 am

Is their a list of diffs that were fitted to Minors. As a friends car seems to be raving too hard when cruising. So when I can I'll check what he has as a start.
Thanks Mick
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Re: Different ratios

Postby woodywoodchipper » Mon Nov 21, 2016 6:49 pm

they should be in the manuals downloaded from left of the home screen

top of my head I think 5/6 where used across the range

if your friend has uprated from 948 to 1098 plus g/box then yes he will over rev.

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Re: Different ratios

Postby mickm » Mon Nov 21, 2016 7:09 pm

Thanks sorted now Mick
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Re: Different ratios

Postby mickm » Thu Feb 23, 2017 1:59 pm

Ok I thought this problem had gone away. But can aomeone explain to me, 1 turn of the rear wheel results in 2.25 turns of the propshaft. Now I thought this was the ratio> :oops: Or is it that someone cant count!!!
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Re: Different ratios

Postby Custard » Thu Feb 23, 2017 2:17 pm

I think you need to multiply by 2 and that what you have is 4.5 to 1.

The pinion in the diff connected to the propshaft is the small one so it has gone round 2.25 times to produce one revolution of the wheel.

I imagine you have the other rear wheel stationary. So as the crownwheel in the diff moves at the average of the two rearwheels it has only gone round half a turn so to get the extra turn you need to either go twice round with your wheel, or have both wheels free and turn the two together as they would on the road.

If memory serves me right there is a 4.54 diff in the 948.

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Re: Different ratios

Postby Custard » Thu Feb 23, 2017 2:24 pm

Not got my list on work PC but found this one;

http://www.mg-cars.net/mg-midget-sprite ... 323546.htm

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Re: Different ratios

Postby mickm » Thu Feb 23, 2017 2:30 pm

Thanks Custard :D
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