Ecosteve Posted July 17, 2018 Share Posted July 17, 2018 Hey lovely supra folk, Keep reading conflicting information regarding diff ratio's. I have a 1993 supra, originally a w58 with lsd from factory ( 4.08 i believe). My car is now fitted with a GTE and a Getrag 420G 6 speed( similar ratio to the toyota 6 speed i was told). The car is very short geared because of this, at 120 its on the redline in 6th. What options do i have to make the gearing taller? Ideally a diff that will fit directly as i have a custom prop shaft etc. Hope i got all the info in there sorry its long winded . Cheers Quote Link to comment Share on other sites More sharing options...
el_bandido Posted July 17, 2018 Share Posted July 17, 2018 (edited) Two options for the small case Supra diff ring and pinion will give you the following (your current set up on the left of both images): 1 2 ~3.7 for the 6 speed NA and ~3.2 for the small case (which apparently exists) 6 speed TT. Failing that, you'll have to get a big case TT diff with the same ratio. There are a few other options from the Lexus range, including the custom ones offered by Whifbitz (which I can give you screen shots of) but that would require a custom set up for the prop and diff. I've no idea why you're redlining at 120, even with that short diff you should be able to hit 160. Edited July 17, 2018 by el_bandido (see edit history) Quote Link to comment Share on other sites More sharing options...
Ecosteve Posted July 17, 2018 Author Share Posted July 17, 2018 At the time it had a lower redline aswell around 5000(that issue now fixed) but its way to short geared for me. Fantastic information there really appreciate it. Il get searching for a 3.2 idealy, wanting to go big single so think the taller gearing will help in boost times. I was wondering about the Lexus options. Gs400 etc. Thanks again for the help Quote Link to comment Share on other sites More sharing options...
el_bandido Posted July 17, 2018 Share Posted July 17, 2018 The Lexus options from that era are very similar; you'd be looking at the IS-F, IS350 (8 speed) and IS220D if you want to go lower than 3.2. Whifbitz offer a 2.9 and 2.6 using the IS-F diff housing, but this may not (probably won't) fit with your prop. For reference, these are the two options that Whifbitz provide (both of which would be a bit too tall I think): I think the 3.2 would be pretty much bang on, it's nigh on identical to a V160. Quote Link to comment Share on other sites More sharing options...
Ecosteve Posted July 17, 2018 Author Share Posted July 17, 2018 Perfect again thanks very much. 3.2 first choice 3.7, seccond. Having never played with diff ratio's do I need a full diff? Or just change the ring and pinion? Are special pulling tool's required etc?. Quote Link to comment Share on other sites More sharing options...
el_bandido Posted July 17, 2018 Share Posted July 17, 2018 As far as I understand, all the small case differentials can have the ring and pinion swapped between them. Not sure on tools, I did an entire diff swap for the sc300 NA auto (~4.3), as my original plan was a 3uz with a761e auto on paddles. Quote Link to comment Share on other sites More sharing options...
Ecosteve Posted July 17, 2018 Author Share Posted July 17, 2018 Awsome thanks il go diff hunting/ring and pinion hunting:) Quote Link to comment Share on other sites More sharing options...
el_bandido Posted July 17, 2018 Share Posted July 17, 2018 I would urge you to research this independently just in case anything I've said is wrong. While my data has been collected and carefully pieced together over some years, not all of it is first hand. Quote Link to comment Share on other sites More sharing options...
Ecosteve Posted July 18, 2018 Author Share Posted July 18, 2018 I will cheers man, gives me places to look . Perfect help i appreciate it Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 18, 2018 Share Posted July 18, 2018 Sped limit is 70 you know... Quote Link to comment Share on other sites More sharing options...
el_bandido Posted July 18, 2018 Share Posted July 18, 2018 Not on a track or large parts of Europe. Quote Link to comment Share on other sites More sharing options...
Ecosteve Posted July 18, 2018 Author Share Posted July 18, 2018 Got a long driveway Craigmuns Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 19, 2018 Share Posted July 19, 2018 You live in Blackpool, Im surprised you even have a house. Quote Link to comment Share on other sites More sharing options...
Ecosteve Posted July 20, 2018 Author Share Posted July 20, 2018 Troll go away (i dont) Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 21, 2018 Share Posted July 21, 2018 Troll go away �� (i dont) :d Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.