eyefi Posted January 3, 2003 Share Posted January 3, 2003 brousing the NZ site it lists the uk manual dif ratio as 3.133:1 and the jspec as manual as 3.266:1. can anyone confirm this? why would this be different if the trannys have the same ratios? could someone check their axel code on a ukspec please. there isnt an axle code for 3.133 in the list? cheers Quote Link to comment Share on other sites More sharing options...
GavinL Posted January 3, 2003 Share Posted January 3, 2003 Originally posted by eyefi brousing the NZ site it lists the uk manual dif ratio as 3.133:1 and the jspec as manual as 3.266:1. can anyone confirm this? why would this be different if the trannys have the same ratios? could someone check their axel code on a ukspec please. there isnt an axle code for 3.133 in the list? cheers UK spec 0-155mph j-spec 0-112mph Quote Link to comment Share on other sites More sharing options...
FaithStalker Posted January 3, 2003 Share Posted January 3, 2003 huh? my jspec has done 150 leptons (its an AUTO) Quote Link to comment Share on other sites More sharing options...
GavinL Posted January 3, 2003 Share Posted January 3, 2003 Originally posted by FaithStalker huh? my jspec has done 150 leptons (its an AUTO) [/quote Only because it has been modified to do so. Japan limits it's cars to 112mph so there is little point in gearing the car for big top end you may as well gear it for better acceleration. This limit probably explains why the J-spec has the more responsive, torquey turbo's for better low down performance. Quote Link to comment Share on other sites More sharing options...
FaithStalker Posted January 3, 2003 Share Posted January 3, 2003 cooooool cheers GavinL Quote Link to comment Share on other sites More sharing options...
Terminator Posted January 3, 2003 Share Posted January 3, 2003 So just remember that, when you are racing UK specs at 160 leptons and above. Quote Link to comment Share on other sites More sharing options...
eyefi Posted January 3, 2003 Author Share Posted January 3, 2003 here r the gearing calcs for both diffs Quote Link to comment Share on other sites More sharing options...
Keith C Posted January 3, 2003 Share Posted January 3, 2003 Originally posted by Terminator So just remember that, when you are racing UK specs at 160 leptons and above. Yeah - best you do, or this'll happen: Quote Link to comment Share on other sites More sharing options...
FaithStalker Posted January 3, 2003 Share Posted January 3, 2003 wont the jspec leave the uk standing until "higher" leptons then??? Quote Link to comment Share on other sites More sharing options...
GavinL Posted January 3, 2003 Share Posted January 3, 2003 Originally posted by FaithStalker wont the jspec leave the uk standing until "higher" leptons then??? Certainly quicker I'm not sure about "left standing". Quote Link to comment Share on other sites More sharing options...
FaithStalker Posted January 3, 2003 Share Posted January 3, 2003 hey!!! we have to put up with how superior the dam UK spec is, well you'll have to put it with "left standing" until someone proves otherwise ! :D :D Quote Link to comment Share on other sites More sharing options...
Branners Posted January 3, 2003 Share Posted January 3, 2003 26th Jan...Santa Pod....just remember the official for the event drives a UK spec....Im sorry sir, those crisp packets are integral to the car, thats instant disqualification for removing them...NEXT.:littled: JB Quote Link to comment Share on other sites More sharing options...
Matt C Posted January 3, 2003 Share Posted January 3, 2003 I can tell a small difference in acceleration between my old J-Spec and my current UK car. I don't think there is a great deal in it though..... Quote Link to comment Share on other sites More sharing options...
Steve W Posted January 4, 2003 Share Posted January 4, 2003 AM I MISSING SOMETHING HERE ? ? IF my J-spec is doing ~85mph at ~3,000 AND a UK spec is doing ~85mph at ~3,000 THEN both their OVERALL gearing must be 'near' identical ? WHY would they make the final/diff ratio different AND the box ratios different just to end up at the same overall ratios ? ? (OR, am I wrong, I thought we all had ~ 85-v-3,000 ? ? ) FatS. Quote Link to comment Share on other sites More sharing options...
GavinL Posted January 4, 2003 Share Posted January 4, 2003 Originally posted by Steve W AM I MISSING SOMETHING HERE ? ? IF my J-spec is doing ~85mph at ~3,000 AND a UK spec is doing ~85mph at ~3,000 THEN both their OVERALL gearing must be 'near' identical ? WHY would they make the final/diff ratio different AND the box ratios different just to end up at the same overall ratios ? ? (OR, am I wrong, I thought we all had ~ 85-v-3,000 ? ? ) FatS. Where did different box ratios come from? Quote Link to comment Share on other sites More sharing options...
Steve W Posted January 4, 2003 Share Posted January 4, 2003 Gav, IF there are different diff' ratios BUT the overall ratio is the same (?) then the box ratio must be different to suit. HAS ANYONE GOT SIGNIFICANTLY DIFFERENT FROM 85mph=3,000 ? ? If not, then we've all got the SAME overall gearing ? ! ? Toyota would NOT have made a 'tiny' difference in the ratio... It's just not worth the production costs in such a 'small' volume car....if there are different diff's they'd be 'noticably' different ? ? Quote Link to comment Share on other sites More sharing options...
Syed Shah Posted January 4, 2003 Share Posted January 4, 2003 Yes they did. All export Supras (NZ, US, Euro etc) had a 3.13 diff, the j-specs had the 3.27. That is why a UK car is geared for 204mph, and the import for 'only' 196mph. Quote Link to comment Share on other sites More sharing options...
cuth Posted January 4, 2003 Share Posted January 4, 2003 With regards to the top end of a J-Spec. I've done 162 leptons in an unmodified auto.(except de-limiter) How come???? Incidentally, I was whipping the arse of an Audi TT and a Bimmer 328i at the time! Cuth Quote Link to comment Share on other sites More sharing options...
GavinL Posted January 4, 2003 Share Posted January 4, 2003 Originally posted by cuth With regards to the top end of a J-Spec. I've done 162 leptons in an unmodified auto.(except de-limiter) How come???? What do you mean how come? Quote Link to comment Share on other sites More sharing options...
Supra Pilot Posted January 4, 2003 Share Posted January 4, 2003 Originally posted by Syed Shah Yes they did. All export Supras (NZ, US, Euro etc) had a 3.13 diff, the j-specs had the 3.27. That is why a UK car is geared for 204mph, and the import for 'only' 196mph. Hmmmmmmmm, maybe because the the Uk spec comes with the 17 inch wheels and the J spec with 16 inch..'rolling diameter' Just checking:stupid: Quote Link to comment Share on other sites More sharing options...
cuth Posted January 4, 2003 Share Posted January 4, 2003 Well if the J-Spec is unmodified, how come the top end is above 160, the same as the UK Spec. Quote Link to comment Share on other sites More sharing options...
Keith C Posted January 5, 2003 Share Posted January 5, 2003 Because an unmodified J-spec will easily do 160, that's why. Quote Link to comment Share on other sites More sharing options...
eyefi Posted January 5, 2003 Author Share Posted January 5, 2003 steve, euro & us spec do have a different diff ratio, the box ratios r the same. at 3500rpm, this difference would give u about 3mph less speed in a jspec. quite a few americans swap out to a 3.3. supra pilot, jspec also came with 17" wheels and a 3.3 diff. cuth, im not sure why u r confused about doing 162mph. both cars will go beyond that. at the end of the day it (jspec) is a slightly more accelerative diff, thus loosing some top end. i wonder if the jspec autos have the same diffs as ukspec? Quote Link to comment Share on other sites More sharing options...
Steve W Posted January 5, 2003 Share Posted January 5, 2003 Just been scouring mkIV / UK Supras / NZ / Aus etc. Well you must be right, 'cos everyone on the other forums says the same ! BUT, they do ALL seem to refering/linking to the same 'posted' figures on 1 site (the NZ site). ? ? That says that ALL 'exports' (FROM Japan) had the higher diff. BUT, it also states that the higher diff (ie. the UK etc) has a quicker 0-100kph AND 400metres ? ? ? SO, according to the only source ABOUT the diffs (?) the longer ratio car is the quicker accelerating ? ! ? Have this page from (I assume..) USA specs ('cos it's from mkIV site).......... autos completely different anyway ? ! ?.... > > Quote Link to comment Share on other sites More sharing options...
Steve W Posted January 5, 2003 Share Posted January 5, 2003 I wonder if MANUALS are different, but maybe ALL AUTOS have the same diff ? ? ? Can't find any mention of different auto diff's ? ? [i give up anyway... 4% ratio difference hardly seems worth buggering about with anyhow ? ! ? !] Carry on lads.................................. :zzz: Quote Link to comment Share on other sites More sharing options...
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