Longer 6th gear?
Longer 6th gear?
I'm wondering if anyone knows of any Toyota's that have longer 6th gears that can be fitted to an IS200 gearbox.
I'd like to make 6th into a "proper" cruising gear, currently at 70 it revs around 3k and I'd like to lower that.
Any info would be great.
Thanks
Stix.
Hi,
I'm wondering if anyone knows of any Toyota's that have longer 6th gears that can be fitted to an IS200 gearbox.
I'd like to make 6th into a "proper" cruising gear, currently at 70 it revs around 3k and I'd like to lower that.
Any info would be great.
Thanks
Stix.
jae 2010 best lexus category show and shine winner
jae 2010 ice outlaw award 2nd place
jae 2011 ice outlaw award 1st place
is300_dino
13-03-2020, 05:01 AM #2is this the kind of thing your after? http://www.ebay.co.uk/itm/JDM-Toyota-fin...1245wt_932
jae 2010 best lexus category show and shine winner
jae 2010 ice outlaw award 2nd place
jae 2011 ice outlaw award 1st place
He extends the 5th Gear on the MR2 and also does 6th Gear work on the Celica box so may be worth a call.
Other wise contact Dave Ashcroft at Ash Croft Transmissions he maybe able to put something together for you.
Contact Tony Wood at Woodsport he does this short of thing for MR2's.
He extends the 5th Gear on the MR2 and also does 6th Gear work on the Celica box so may be worth a call.
Other wise contact Dave Ashcroft at Ash Croft Transmissions he maybe able to put something together for you.
is300_dino is this the kind of thing your after? http://www.ebay.co.uk/itm/JDM-Toyota-fin...1245wt_932
I've already got that saved in my eBay and it would work but it would make all the gears longer, I'm very happy with all the other gears just not 6th! Thanks though.
is300_dino is this the kind of thing your after? http://www.ebay.co.uk/itm/JDM-Toyota-fin...1245wt_932
I've already got that saved in my eBay and it would work but it would make all the gears longer, I'm very happy with all the other gears just not 6th! Thanks though.
Rolex Contact Tony Wood at Woodsport he does this short of thing for MR2's.
He extends the 5th Gear on the MR2 and also does 6th Gear work on the Celica box so may be worth a call.
Other wise contact Dave Ashcroft at Ash Croft Transmissions he maybe able to put something together for you.
Sweet, thanks mate.
Rolex Contact Tony Wood at Woodsport he does this short of thing for MR2's.
He extends the 5th Gear on the MR2 and also does 6th Gear work on the Celica box so may be worth a call.
Other wise contact Dave Ashcroft at Ash Croft Transmissions he maybe able to put something together for you.
Sweet, thanks mate.
Assuming you've got 23" total wheel height (so 18" +2.5" thick tyre) with the 4.1 diff doing a true speed of 70mph you're revving at about 3700 rpm in 6th with the standard 0.89 gearing, if you can get that dropped to a 0.7 or even a 0.65 gear you'd be doing 2900rpm or 2700rpm respectively. Correct me if I'm wrong, but this is below the 1g-fe's peak torque efficiency isn't it? Even with the extra grunt from the supercharger I think it would start asking to be dropped back into 5th or actually have the potential to be worse on fuel. It would be better for cruising at 80-85 though
el_bandido
13-03-2020, 08:20 AM #6a 4.1 diff will make it worse, or identical as that's the ratio of an IS200 anyway isn't it? You want the 3.7 diff from an IS300 if you were going that route surely? Even if you got 6th dropped to a 0.7 gear rather than a 0.89 it's still sitting at about 2800-3000rpm at 70 depending on wheel size.
Assuming you've got 23" total wheel height (so 18" +2.5" thick tyre) with the 4.1 diff doing a true speed of 70mph you're revving at about 3700 rpm in 6th with the standard 0.89 gearing, if you can get that dropped to a 0.7 or even a 0.65 gear you'd be doing 2900rpm or 2700rpm respectively. Correct me if I'm wrong, but this is below the 1g-fe's peak torque efficiency isn't it? Even with the extra grunt from the supercharger I think it would start asking to be dropped back into 5th or actually have the potential to be worse on fuel. It would be better for cruising at 80-85 though
edit: repeating the above maths with the S15 6th gear gives you an RPM of 3200 at a true speed of 70mph using the 4.1 IS200 diff, which is 500rpm lower than the standard 6th gear.
el_bandido
13-03-2020, 08:25 AM #7Also: The S15 J160 gearbox (which is internally "the same" as the IS200 J160) has a 6th gear ratio of 0.767:1 so this may be a cheap option if you want to drop it a little bit.
edit: repeating the above maths with the S15 6th gear gives you an RPM of 3200 at a true speed of 70mph using the 4.1 IS200 diff, which is 500rpm lower than the standard 6th gear.
el_bandido Also: The S15 J160 gearbox (which is internally "the same" as the IS200 J160) has a 6th gear ratio of 0.767:1 so this may be a cheap option if you want to drop it a little bit.
edit: repeating the above maths with the S15 6th gear gives you an RPM of 3200 at a true speed of 70mph using the 4.1 IS200 diff, which is 500rpm lower than the standard 6th gear.
I was just reading that earlier, 500rpm would do me - I know it sounds silly but what I want to stop doing is looking at the rev counter and thinking "****** hell I must still be in 5th!" And then realising nope the car just revs its tits off in 6th.
Quick question for the maths wizz
would the s15 gear increae or decrease top speed? The other thing I was reading was that the S2000 gearbox has carbon fibre syncros rather than brass and apparently they give a "nicer engagement" - not that I have a problem with it in the first place!
el_bandido Also: The S15 J160 gearbox (which is internally "the same" as the IS200 J160) has a 6th gear ratio of 0.767:1 so this may be a cheap option if you want to drop it a little bit.
edit: repeating the above maths with the S15 6th gear gives you an RPM of 3200 at a true speed of 70mph using the 4.1 IS200 diff, which is 500rpm lower than the standard 6th gear.
I was just reading that earlier, 500rpm would do me - I know it sounds silly but what I want to stop doing is looking at the rev counter and thinking "****** hell I must still be in 5th!" And then realising nope the car just revs its tits off in 6th.
Quick question for the maths wizz
would the s15 gear increae or decrease top speed? The other thing I was reading was that the S2000 gearbox has carbon fibre syncros rather than brass and apparently they give a "nicer engagement" - not that I have a problem with it in the first place!
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