Need4Speed Posted May 2, 2003 Share Posted May 2, 2003 CAN you spin both wheels if you have a 'normal' diff? Yes but it's unlikely as one wheel will break traction first and with a car like the Supra, it will light up pretty quick. Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted May 2, 2003 Share Posted May 2, 2003 Am I correct in thinking that these Thorsen units behave like ordinary diffs if you have the back wheels off the ground? As in turn one and the other turns in the opposite direction, like a conventional diff. Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted May 2, 2003 Share Posted May 2, 2003 Originally posted by Branners The LSD will give you much better acceleration out of corners and probably better straight line acceleration. But as it keeps power going to both wheels if possible then it will make the car much more prone to powerslides and tail flicks. My first run with an LSD at Pod I was used to just keeping my foot on the floor and letting the wheel find grip again, with an LSD the car started to powerslide and kept going, I jumped off the power and fishtailed at 80mph. Facing that concerete wall at that speed is scary. John, I was going to ask about that last time LSDs were being discussed. With a normal diff in a straight line one wheel lights up and that's about it, but with an LSD whe you lose traction the back end could go anywhere. Is this correct? There was a big discussion about LSDs around Xmas http://www.mkivsupra.net/vbb/showthread.php?s=&threadid=4959 Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted May 2, 2003 Share Posted May 2, 2003 Steve - yes but you have to break traction on both wheels. An LSD makes the car much more stable coming out of corners under power. With a conventional diff, once one wheel spins it loses all its lateral grip as well, leaving the other to put the power down and provide all the cornering forces at the rear. It can't do all this, so the car spins. You're always better off with an LSD. Quote Link to comment Share on other sites More sharing options...
Terminator Posted May 2, 2003 Share Posted May 2, 2003 Originally posted by Steve W PHIL, where's the vehicle plate ? the one on the edge under the bonnet with the Chassis No. etc ? [/b] Yep thats the one. Quote Link to comment Share on other sites More sharing options...
Branners Posted May 2, 2003 Share Posted May 2, 2003 Originally posted by Steve Cargill John, I was going to ask about that last time LSDs were being discussed. With a normal diff in a straight line one wheel lights up and that's about it, but with an LSD whe you lose traction the back end could go anywhere. Is this correct? There was a big discussion about LSDs around Xmas http://www.mkivsupra.net/vbb/showthread.php?s=&threadid=4959 As JP as said, yes both wheels will try and grip and it has the potential to throw the car sideways. Thats why the RLTC becomes much more important on a car with LSD and lots of boost. Non-lsd car will just spin one wheel and not kill you. Just for info, there was the usual pointless discussion with Mycroft over on the scoob board and he suggested using a 285x35x17 tyre on a stock 9.5" rim on the rear, stay with the 235x17 on the front and all the tail happiness will disappear. Make of that what you will (so many discussion points there that its untrue). I would suggest if you havent got an LSD fitted then get one, but also factor in that you will need RLTC at some point as well. JB Quote Link to comment Share on other sites More sharing options...
Suprash Posted May 3, 2003 Share Posted May 3, 2003 What would my 98 model have, this is confusing stuff !!!! Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted May 3, 2003 Share Posted May 3, 2003 the usual pointless discussion with Mycroft No comment Quote Link to comment Share on other sites More sharing options...
Terminator Posted May 3, 2003 Share Posted May 3, 2003 Originally posted by Ashley Willis What would my 98 model have, this is confusing stuff !!!! I would suggest that it has an LSD but the only way to check what was fitted to the car when it left the factory is to look at the plate on the OS wing just behind the front suspension turret. What happened after that is any ones guess;) JHM cars had so many option choices. John there is no difference in the action of the wheels when you jack up the rear and and spin one wheel on either diff. The difference is only apparent when there is significant torque applied to the LSD diff and there is resistance at both wheels AFAIK Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted May 3, 2003 Share Posted May 3, 2003 Terminator - jack up the rear and and spin one wheel on either diff I had noticed and at first it had me confused. I could do this yet it was instantly obvious to me that the car had an LSD when I first test drove it. Quote Link to comment Share on other sites More sharing options...
Branners Posted May 3, 2003 Share Posted May 3, 2003 Ashley, if your car does have it then its probably a slightly different type to the early supras. They changed it in the facelift models from one type to another. I will see if I can find the info on mkiv.com which explains how they changed it. JB Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted May 3, 2003 Share Posted May 3, 2003 go here a thread about diffs n lsd on supra forums diffs n lsd have you been on the new zealand supra site it has lots of info. if you look at your vin plate it will tell you what you have on your car. http://www.mkiv.co.nz/index.htm (go to specs) AXLE Example Description Ring Gear Size A A (138mm), B (145mm) Differential Ratio 01 01 (4.083:1), 02 (3.769:1), 03 (3.267:1) Differential Type A A (Std diff), B (Torsen LSD) my jap spec supra tt auto has no LSD (A02A) MODEL = E-JZA80-ALPVZ ENGINE = 2JZ-GTE 2997cc FRAME NO = JZA80-00***** COLOUR = 199 TRIM = FA20 TRANS./AXEL = A340E A02A PLANT/BUILT = A22 Quote Link to comment Share on other sites More sharing options...
Suprash Posted May 3, 2003 Share Posted May 3, 2003 Branners, Cheers mate. Mark, I have done the plate number thing before, just it didnt mean much back then, will do it again, cheers.... Quote Link to comment Share on other sites More sharing options...
Steve W Posted May 4, 2003 Share Posted May 4, 2003 Just went and checked mine........ SO, mine has (or, HAD?) a LSD ? ! That might add to the reason for my "Rainy-Day-Fence-Renovation" episode then ? When it let go, it REALLY let go ? ? Quote Link to comment Share on other sites More sharing options...
Steve W Posted May 4, 2003 Share Posted May 4, 2003 HOWEVER, that means I CAN'T blame 'single-wheel-spin' for the Near-Side tyre wear ! ! It may be just A) normal Rear/Inner edge wear due to the rear 'splayed-out' geometry:- Quote Link to comment Share on other sites More sharing options...
Steve W Posted May 4, 2003 Share Posted May 4, 2003 AND the Near-Side is worse because of Road Camber (most of my driving is small/town/B roads = more pronounced camber ! ?):- Quote Link to comment Share on other sites More sharing options...
Steve W Posted May 4, 2003 Share Posted May 4, 2003 Actual pic of REARS..... NOW !:- Quote Link to comment Share on other sites More sharing options...
Steve W Posted May 4, 2003 Share Posted May 4, 2003 [ the inner edge of 1 rear was worn when I got them 2nd-hand... so it 's not ALL me ! !- was probably THAT one AND.... don't take the P*SS out of my 'camber/splay' sketchs... I never took Techie Drawin' at school:D AND, YES it HAS got a Vin number.... but not on HERE ! ! ] Quote Link to comment Share on other sites More sharing options...
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