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Author Topic: Diff ratio  (Read 1049 times)

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mrjimbo

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Diff ratio
« on: 02 December 2010, 11:50:17 »
What diff ratio's were fitted to the Omega ?
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Kevin Wood

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Re: Diff ratio
« Reply #1 on: 02 December 2010, 12:19:10 »
Here you go...

http://www.omegaowners.com/forum/YaBB.pl?num=1163895469/0#0

3.7, 3.9 and 4.22 on the petrol models and 3.45 on the DTI.

Kevin
« Last Edit: 02 December 2010, 12:19:21 by Kevin_Wood »
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mrjimbo

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Re: Diff ratio
« Reply #2 on: 02 December 2010, 12:37:57 »
So would that be 3.90 on a 3.0V6 Auto Estate ?

It only has 2.5/2.6 and 3.2 listed  ;)
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Kevin Wood

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Re: Diff ratio
« Reply #3 on: 02 December 2010, 14:11:51 »
Quote
So would that be 3.90 on a 3.0V6 Auto Estate ?

It only has 2.5/2.6 and 3.2 listed  ;)

I believe so. On the 3.0 they were 3.90 on the autos and 3.70 on the manuals I believe.

A V6 Auto with a 3.9 is doing about 80MPH indicated at 3,000 RPM in top. :y

Kevin
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mrjimbo

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Re: Diff ratio
« Reply #4 on: 02 December 2010, 14:17:26 »
OK, i'll have a look see what the rev counter is saying at 80mph later, on the private road of course  ;)

75mph on the motorway yesterday it was doing about 2800rpm so it looks like it is a 3.90  :y

I will report back later
« Last Edit: 02 December 2010, 14:20:24 by mrjimbo »
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mrjimbo

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Re: Diff ratio
« Reply #5 on: 02 December 2010, 17:01:07 »
3000rpm is 80mph  :y

Thanks Kevin
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2woody

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Re: Diff ratio
« Reply #6 on: 03 December 2010, 21:06:53 »
....... work it out exactly.

mph per 1000 revs = 60,000 divided by ( diff ratio x top gear ratio x wheel revs per mile )

wheel revs per mile should be 817.
doing it it 4th gear removes the top gear figure from the equation as it's 1:1 ratio.

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