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diff gears 

 

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 Post subject: diff gears
Posted: Thu May 10, 2007 9:31 pm 
Parts Gopher
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hey i just had my diff rebuilt to lsd and i went a bit savage on the gears i am traveling to the country and back every week and 4:11 gears are too much what gears would suit i still wana get of the line half decent cheers
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Posted: Thu May 10, 2007 9:35 pm 
Smokin em up
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What motor?. Maybe try 3.9s or 3.7s.
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Posted: Thu May 10, 2007 9:39 pm 
Getting Side Ways
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whats revs it doin at 100km/h? And whats not too much at 100km/h for you?
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Posted: Thu May 10, 2007 9:39 pm 
Parts Gopher
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just a six mate dont know why i went 411 so yeah i guess il have a set of 411's a sale soon only done bout 2500
ks with em
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Posted: Thu May 10, 2007 9:40 pm 
Parts Gopher
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its revin at rnd 2600 wouldnt mind 2200 max
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Posted: Thu May 10, 2007 9:44 pm 
Getting Side Ways
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Auto or manual? I know stupid question.......

Final drive ratio?
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Posted: Thu May 10, 2007 9:48 pm 
Parts Gopher
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manual it just revs so hard now im chewn petrol flatout
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Posted: Thu May 10, 2007 10:16 pm 
Getting Side Ways
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Ok dude, based on your car revving at 2600 rpm @ 100km/h i did some calculations.....

3.23 ratio = 2050 rpm @ 100km/h
3.45 ratio = 2200 rpm @ 100km/h
3.7 ratio = 2300 rpm @ 100km/h
3.9 ratio = 2450 rpm @ 100km/h
4.11 ratio = 2600 rpm @ 100km/h

So i reckon go with 3.45 ratio diff with a bit of engine modding to help it get off the line quicker :wink:

Last edited by FordFairmont on Thu May 10, 2007 10:21 pm, edited 1 time in total.

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Posted: Thu May 10, 2007 10:21 pm 
Tyre Shredder
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4.11 gears are more for autos with the maniual all youll need is 3.45 which you can drop the clutch and do a good take off and itll be revin low on the freeway
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Posted: Thu May 10, 2007 10:40 pm 
Parts Gopher
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thanks for those calculations yeah 3:45 sound like what im after
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Posted: Thu May 10, 2007 11:17 pm 
Tyre Shredder
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yeah 3:45 or 3:7 is the go! 3:7 is savage in first gear as were 3:45 u get plenty more in the up end department with good acceleration as well
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