THOR Racing Posted July 8, 2003 Share Posted July 8, 2003 What are the rear diff ratios of the Jap Spec TT manual Jap Spec NA manual Jap Spec TT auto Jap Spec NA auto UK Spec TT manual UK Spec NA manual UK Spec TT auto UK Spec NA auto ?? and the gear ratios for the auto and manual boxes? Plus if your competing at TOTBII this year can I have your diff ratios as well please. There is going to be TV coverage of competitor cars on THOR's dyno trailer rig. As a competitor you get a free dyno power run. I think they are Jap Spec TT manual (3.266:1) Jap Spec NA manual (3.768:1) Jap Spec TT auto (3.769:1) Jap Spec NA auto (4.083:1) UK Spec TT manual (3.133:1) UK Spec NA manual ?? UK Spec TT auto ?? UK Spec NA auto ?? With D on an auto being 1:1 ratio. Which gear on the manual is a 1:1 drive? Regards Pete ps. I haven't used the search Link to comment Share on other sites More sharing options...
THOR Racing Posted July 8, 2003 Author Share Posted July 8, 2003 So I did a search and found this.... 6 Speed (V160) / (V161) 1 3.827 / 3.724 2 2.360 / 2.246 3 1.685 / 1.541 4 1.312 / 1.205 5 1.000 / 1.000 6 0.793 / 0.818 rev 3.280 / 3.192 final drive 3.266(all TT) / 3.769(NA) So 5th gear is 1:1 drive and the diff ratios sort of match?? Pete Link to comment Share on other sites More sharing options...
mos Posted July 8, 2003 Share Posted July 8, 2003 Hi Pete i posted a question a while back about swapping my diff for greater acceleration with a top end drop, these are what i was told: U.K. 6 sp = 3.133 jap 6 sp = 3.27 auto (all) = 3.73 N.A =4.083 Just so you know there is no U.K. spec N/A in auto or manual Link to comment Share on other sites More sharing options...
mos Posted July 8, 2003 Share Posted July 8, 2003 Try http://www.mkiv.co.nz/specs.htm Link to comment Share on other sites More sharing options...
THOR Racing Posted July 8, 2003 Author Share Posted July 8, 2003 Thanks Mos, Regards Pete Link to comment Share on other sites More sharing options...
Ian C Posted July 8, 2003 Share Posted July 8, 2003 Originally posted by TRL Performance Plus if your competing at TOTBII this year can I have your diff ratios as well please. There is going to be TV coverage of competitor cars on THOR's dyno trailer rig. As a competitor you get a free dyno power run. Is that a free run to all competitors or to Supras only? Might need to clarify that before the queue gets to 100 cars long on the day I'm scared, a proper dyno will show my Supra up for the weed it is next to all the big boys! j-spec 6spd manual by the way. -Ian Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 8, 2003 Share Posted July 8, 2003 Ian I fully expect you to have the most powerful car there. Link to comment Share on other sites More sharing options...
MONKEYmark Posted July 8, 2003 Share Posted July 8, 2003 so whats the best diff to go for if you want off line speed and sacrifice a bit of top end? is the lower numbers best or high numbers on diffs. and with gearboxes can you alter them for better gearing. would you beable to tell easy if there is much difference so is a higher diff ratio better for top speed and a lower ratio diff for off line and not as high a top speed. just curious Link to comment Share on other sites More sharing options...
Ian C Posted July 8, 2003 Share Posted July 8, 2003 Originally posted by Terry S Ian I fully expect you to have the most powerful car there. Only if turn up a day early I'm going to damn well enjoy myself no matter what, whether I get thrashed or if I do OK. I know it's stupidly fast in real life, and that's good enough for me! -Ian Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 8, 2003 Share Posted July 8, 2003 Mate I think you will do just fine. You surprised a lot of people last year & one notable one. Link to comment Share on other sites More sharing options...
THOR Racing Posted July 9, 2003 Author Share Posted July 9, 2003 Is that a free run to all competitors or to Supras only? Might need to clarify that before the queue gets to 100 cars long on the day I said COMPETITORS We are about to announce that there will be a biggest spectator bhp event with a prize from the organiser. (Spectators would pay THOR £50 for a power run (We just want to cover the costs of hiring the 20KVA generator, travel etc etc)) Not sure how many spectators we would dyno considering there's quite a few competitors, but as a competitor you'd get free TV coverage, especially if you have something of special interest. No guarantee of course (like everything) but they plan on following each competitor through the stages of the various trials and I think especially people like Leon Green TT, Terry Saunders TT, Rocket Ronnie GTR and Bruce Spence GTiR will be top of the list. You should all be able to see the gear at JAE on 26th/27th. This is highly dependant on the trailer being ready (Fingers crossed) The Dyno is at Heathrow now and we are awaiting customs clearance oooooooo getting exciting now..... As Terry has read this, can you PM me or email me if you've changed your rear diff? Same as Leon (Terry might know) The equipment can work this out but would be nice to have a starting point to speed dyno's up regards Pete Link to comment Share on other sites More sharing options...
mos Posted July 9, 2003 Share Posted July 9, 2003 Monkey the N/A diff is better for off the line but has less top end. The only snag would be speedo re-calibration. Yes you can alter them but with expense. Have a look at http://www.mkivsupra.net/vbb/showthread.php?s=&threadid=10071 Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 9, 2003 Share Posted July 9, 2003 Originally posted by TRL Performance As Terry has read this, can you PM me or email me if you've changed your rear diff? Same as Leon (Terry might know) The equipment can work this out but would be nice to have a starting point to speed dyno's up regards Pete PM sent Pete. Link to comment Share on other sites More sharing options...
THOR Racing Posted July 9, 2003 Author Share Posted July 9, 2003 Monkey the N/A diff is better for off the line but has less top end. The only snag would be speedo re-calibration. Yes you can alter them but with expense. Have a look at http://www.mkivsupra.net/vbb/showth...&threadid=10071 I can supply UK or Jap spec speedo converters to allow re-calibration for diffs (Something you can do youself, just by turning a dial inside). Done this a lot lately. One for Fensport's Corolla GT4 and 2000ZX's with Skyline engines etc and other Supras with changed diffs. Regards Pete Link to comment Share on other sites More sharing options...
GavinL Posted July 9, 2003 Share Posted July 9, 2003 Originally posted by TRL Performance I can supply UK or Jap spec speedo converters to allow re-calibration for diffs (Something you can do youself, just by turning a dial inside). Done this a lot lately. One for Fensport's Corolla GT4 and 2000ZX's with Skyline engines etc and other Supras with changed diffs. Regards Pete Pete is it possible to design a box to alter the sensitivity of the power steering? Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 9, 2003 Share Posted July 9, 2003 Originally posted by GavinL Pete is it possible to design a box to alter the sensitivity of the power steering? The ratio is fixed, but it is possible to alter the assisatnce effort given, both hydraulically or mechanically. I would favour the mechanical method, but it is then fixed, you would need to make a different diameter quill shaft. Tricky, but quite feasible. Hydraulically you would alter the line pressure to the rack, the stock method is via a valve, whether it is a simple 2 orifice size device or linear or semi linear I don't know. Moog valves would allow you do some remarkable stuff. All the current F1 cars use Moog valves for their PAS, or derivaties thereof. I have articles that go into serious depth on this, but no means of scanning them, and SAE papers are pretty sensitive things to bandy about the `Net. I also have some stuff in Racecar Enginnering on current F1 PAS technology, and where it appears to be heading. Unbelievably light, compact and energy efficient already! Also seriously costly! Link to comment Share on other sites More sharing options...
THOR Racing Posted July 10, 2003 Author Share Posted July 10, 2003 Pete is it possible to design a box to alter the sensitivity of the power steering? Gavin, I've done this before for another owner. You get a limited increase in stiffness at lower speed. All I can do is increase the frequency of the speed signal the PAS gets to fool it into thinking you are going faster than you are and thus stiffen up the PAS. It did work. Chris, I'm a member of the SAE, which papers do you refer to? I haven't tried altering the valve control. It's not really an area I'm happy to modify normally. Steering and braking are very sensitive areas legally. So I would have to indemnify myself from any problems that would arise. Regards Pete Link to comment Share on other sites More sharing options...
mos Posted July 10, 2003 Share Posted July 10, 2003 I changed the stifness of mine by using a resistor in the power feed to the solenoid but it needed quite a heavy resistor and in the end i have reverted back to the normal operation Link to comment Share on other sites More sharing options...
Guest burny Posted March 24, 2005 Share Posted March 24, 2005 I have recently bought a 90,000 mile 1996 Jap import Auto Supra. I am afraid the Diff is a little noisy. Is this pretty normal at this milage? If it's fixable whats the best way to go about it? Believe it or not many years ago I remember getting a Mk1 supra diff refurbed, but it did not fix the noise. So would appreciate any ideas, inc just leave it alone. it is not leaking any oil or anything like that. Thanks burny Link to comment Share on other sites More sharing options...
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