Lengthening my gears queries....
#1
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Lengthening my gears queries....
Right this might sound stupid but getting there.
I have a Hewland S2 Gearset with very close ratios at the moment.
Havent got a clue what my rear diff is (R180 being a coupe) if it is a 4.1 or what.
Cruising in 5th gear @ 80mph is 4500rpm.
If I do have a 4.1 diff (How can you tell by looking?) then can I put a 3.9 rear diff in or 3.54 diff in to lengthen the gears if you see what I mean.
I wouldnt mind sacrificing a bit to cruise at lower revs and have longer to change between the gears.
Am I making sense? LOL!
I have a Hewland S2 Gearset with very close ratios at the moment.
Havent got a clue what my rear diff is (R180 being a coupe) if it is a 4.1 or what.
Cruising in 5th gear @ 80mph is 4500rpm.
If I do have a 4.1 diff (How can you tell by looking?) then can I put a 3.9 rear diff in or 3.54 diff in to lengthen the gears if you see what I mean.
I wouldnt mind sacrificing a bit to cruise at lower revs and have longer to change between the gears.
Am I making sense? LOL!
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Originally Posted by CustomScoobyIOM
Right this might sound stupid but getting there.
Havent got a clue what my rear diff is (R180 being a coupe)
Havent got a clue what my rear diff is (R180 being a coupe)
if it is a 4.1 or what.
If I do have a 4.1 diff (How can you tell by looking?) then can I put a 3.9 rear diff in or 3.54 diff in to lengthen the gears if you see what I mean.
Am I making sense? LOL!
Last edited by greasemonkey; 10 March 2004 at 02:33 PM.
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Yes I have the DCCD at the moment, wanted to keep so went for the stronger gearset.
I have an STI3 Coupe at the moment 1997 model.
So if I change the front diff and rear diff to 3.9 then I will have lengthened just the final drive or all the gears?
Appreciate the help, got some cash to spend on it so might as well do it properly!
I have an STI3 Coupe at the moment 1997 model.
So if I change the front diff and rear diff to 3.9 then I will have lengthened just the final drive or all the gears?
Appreciate the help, got some cash to spend on it so might as well do it properly!
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Final Drive
Jon, the correct diff that should be in your car (STi Type R coupe ] is 4.4:1 teeth count 9 - 40 you can prove it through the drain plug hole by tippex -ing a tooth for the start point and rotating the crown wheel.
In a JDM car - as you almost ceratinly know the diffs are the same front to rear.
By fitting a 4.1 pair or a 3.9 pair you will use less revs for the same road speed.
David API
Just had second thoughts if your car is a version 3 STi then I think I'm right in saying that you will have a 160 size diff. I am sure they changed to 180 with the V4 and the body facelift.
In a JDM car - as you almost ceratinly know the diffs are the same front to rear.
By fitting a 4.1 pair or a 3.9 pair you will use less revs for the same road speed.
David API
Just had second thoughts if your car is a version 3 STi then I think I'm right in saying that you will have a 160 size diff. I am sure they changed to 180 with the V4 and the body facelift.
Last edited by APIDavid; 10 March 2004 at 04:39 PM.
#6
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you will "lenghten" (increased speed in each gear) the gears by doing the mods suggested, however the "closeness" of the gears will stay the same (i.e. the "drop-off" in revs when changing gear)................
cheers
cheers
Last edited by stockcar; 10 March 2004 at 10:12 PM.
#7
I think stockcar is right, the gearshifts will still come thick and fast!
Just what is the difference between a 160 and 180 diff? The rear diff on my Stiv3 and an early RA diff (4.44 and 4.11 respec) are the same casing/drive shafts.
911
Just what is the difference between a 160 and 180 diff? The rear diff on my Stiv3 and an early RA diff (4.44 and 4.11 respec) are the same casing/drive shafts.
911
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Stockcar is right 911, but the shifts won't come quite as thick and fast as they otherwise would do. If you lengthen the final drive by 10%, the time between shifts will also increase by 10% if you're accelerating flat out.
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Stockcar is right 911, but the shifts won't come quite as thick and fast as they otherwise would do. If you lengthen the final drive by 10%, the time between shifts will also increase by 10% if you're accelerating flat out.
buy a different 5th gear from hewland if its a crusing issue?
Anyone got a contact for Hewland at all?
Thanks for all the help
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