Branners Posted December 31, 2011 Share Posted December 31, 2011 I currently have an open (non LSD) diff on my car. My first import had an LSD retro fitted, and my UK spec had one as standard so I want to fit an LSD at some point. I will never top speed my car so for me I want gearing aimed at acceleration over top speed. What is the best option with the diffs to get that, ie auto vs manual, UK vs import? Or is the gearing on a stock open diff the best for acceleration? Quote Link to comment Share on other sites More sharing options...
JamieP Posted December 31, 2011 Share Posted December 31, 2011 (edited) Id try and pick up a oem auto tt lsd, failing that trd/kazz etc lsd for your diff, but they work out big money once fitted, if you fit a manual lsd diff the gears will be far to long. Na gearing might be a bit better for acceleration but im not sure if the gearing is down to the box or diff. Edited December 31, 2011 by JamieP (see edit history) Quote Link to comment Share on other sites More sharing options...
Branners Posted December 31, 2011 Author Share Posted December 31, 2011 that makes things simple. I will keep an eye out for a stock TT diff once I have RLTC paid for and fitted. Not risking the rear end coming round without RLTC being there. First drag run I did on my first import with the LSD I was used to just keeping my foot on the floor and letting the open diff just spin, the LSD put me sideways at 80mph at Pod leaving me facing the white concrete wall, survived that near miss. Quote Link to comment Share on other sites More sharing options...
David P Posted December 31, 2011 Share Posted December 31, 2011 (edited) If you want acceleration at the expense of top speed, you could swap a T.T. prop flange onto an N/A 4.083 Torsen for a plug&play fit, they are just as strong with a lower ratio. Edited December 31, 2011 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
Parry_10 Posted December 31, 2011 Share Posted December 31, 2011 I have been wondering the same thing as well I always thought fitting an auto diff to a manual gearbox would give longer gearing for some reason, I have a w58 gearbox and an oem auto tt diff... is this the best diff for me for acceleration over top speed? Quote Link to comment Share on other sites More sharing options...
antno Posted December 31, 2011 Share Posted December 31, 2011 I currently have an open (non LSD) diff on my car. My first import had an LSD retro fitted, and my UK spec had one as standard so I want to fit an LSD at some point. I will never top speed my car so for me I want gearing aimed at acceleration over top speed. What is the best option with the diffs to get that, ie auto vs manual, UK vs import? Or is the gearing on a stock open diff the best for acceleration? you know its the crown wheel and pinion that gives the final drive ratio. the actual diff itself controls the way the axle puts the power to the road. one or both wheels. Quote Link to comment Share on other sites More sharing options...
Branners Posted December 31, 2011 Author Share Posted December 31, 2011 Yep, but I'm not planning on tiddling about with crown wheel and pinion sets to get the best solution, I like out of the box options so I just get it bolted in place and carry on. Quote Link to comment Share on other sites More sharing options...
antno Posted December 31, 2011 Share Posted December 31, 2011 Yep, but I'm not planning on tiddling about with crown wheel and pinion sets to get the best solution, I like out of the box options so I just get it bolted in place and carry on. ok pal fair enough Quote Link to comment Share on other sites More sharing options...
David P Posted December 31, 2011 Share Posted December 31, 2011 (edited) Here are some plug&play Torsen options and source. N/A 4AT 4.083 A01B N/A 5MT 4.083 A01B N/A 6MT 3.769 A02B T.T. 4AT 3.769 A02B T.T. 6MT 3.266 A03B U.K. 6MT 3.133 B03D Edited January 3, 2012 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
mellonman Posted January 1, 2012 Share Posted January 1, 2012 can always put smaller wheels or tyres on, even a 275/40 18 and a 275/35 18 are 20mph different at top speed have a look at the tyre size calculator if thats your goal Quote Link to comment Share on other sites More sharing options...
CJ Posted January 1, 2012 Share Posted January 1, 2012 can always put smaller wheels or tyres on, even a 275/40 18 and a 275/35 18 are 20mph different at top speed have a look at the tyre size calculator if thats your goal I'm assuming you missed the part where he said: I will never top speed my car so for me I want gearing aimed at acceleration over top speed. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted January 1, 2012 Share Posted January 1, 2012 An n/a diff will be the best for acceleration. Quote Link to comment Share on other sites More sharing options...
mellonman Posted January 1, 2012 Share Posted January 1, 2012 I'm assuming you missed the part where he said: i think you miss my point if there is a 20mph top speed differance then the gearing is changed making it get to a smaller top speed quicker "acceleration" Quote Link to comment Share on other sites More sharing options...
dude Posted January 1, 2012 Share Posted January 1, 2012 Just ask why the yanks all use a UK tt6 diff, turbo cars work diff to NA's the gearing loads the turbo, otherwise that would all be running 4.11:1 or taller. Quote Link to comment Share on other sites More sharing options...
r0cknr0lla Posted February 21, 2015 Share Posted February 21, 2015 Here are some plug&play Torsen options and source. N/A 4AT 4.083 A01B N/A 5MT 4.083 A01B N/A 6MT 3.769 A02B T.T. 4AT 3.769 A02B T.T. 6MT 3.266 A03B U.K. 6MT 3.133 B03D Thread revival... on this topic its said that the NA diff is best for acceleration.. which is quicker A01 or A02?? Quote Link to comment Share on other sites More sharing options...
dude Posted February 21, 2015 Share Posted February 21, 2015 Thread revival... on this topic its said that the NA diff is best for acceleration.. which is quicker A01 or A02?? See above post !!! Quote Link to comment Share on other sites More sharing options...
bignum Posted February 21, 2015 Share Posted February 21, 2015 Thread revival... on this topic its said that the NA diff is best for acceleration.. which is quicker A01 or A02?? You`ll get through the gears quicker with the A01 Quote Link to comment Share on other sites More sharing options...
JamieP Posted February 21, 2015 Share Posted February 21, 2015 Thread revival... on this topic its said that the NA diff is best for acceleration.. which is quicker A01 or A02?? JB was talking about a LSD for an auto box, on a manual car I'd stick with a manual diff, no way are they faster with a auto diff. Quote Link to comment Share on other sites More sharing options...
r0cknr0lla Posted February 21, 2015 Share Posted February 21, 2015 Cheers for that.. exactly what i wanted to know Quote Link to comment Share on other sites More sharing options...
r0cknr0lla Posted February 21, 2015 Share Posted February 21, 2015 JB was talking about a LSD for an auto box, on a manual car I'd stick with a manual diff, no way are they faster with a auto diff. Yeah im defo not using an auto diff although wanted to comfirm weather 5MT or 6MT NA diffs was quicker for acceleration. Will be lsd too. Quote Link to comment Share on other sites More sharing options...
JamieP Posted February 21, 2015 Share Posted February 21, 2015 If you have a 5 speed box I'd stick with A01, if you turbo it you might be able to go a bit longer gearing, not sure if it will be any quicker though. Quote Link to comment Share on other sites More sharing options...
r0cknr0lla Posted February 21, 2015 Share Posted February 21, 2015 If you have a 5 speed box I'd stick with A01 Cheers Jamie.. much appreciated Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted February 22, 2015 Share Posted February 22, 2015 Shortest ratio you can get as a straight fit option is 4.273:1. USDM NA Supra & NA SC300 had/have them. And so do I. Think my theoretical top speed with the R154 is about 150-155mph Quote Link to comment Share on other sites More sharing options...
r0cknr0lla Posted February 22, 2015 Share Posted February 22, 2015 Shortest ratio you can get as a straight fit option is 4.273:1. USDM NA Supra & NA SC300 had/have them. And so do I. Think my theoretical top speed with the R154 is about 150-155mph Cheers for that pedro.. what is the code for that diff mate? Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted February 22, 2015 Share Posted February 22, 2015 As far as I can tell the full diff code for the 4.273 ratio is A05A for the open or A05B for the torsen. I don't think A05B diffs were too common though, I sourced the correct crownwheel & pinion set from a breaker's yard in Chicago, had it shipped to New York city where a mate was over visiting family and he carried it back in his luggage for me! Then I fitted it to my own torsen unit & casing. A lot of hassle to become probably the slowest unique Supra in Europe! Quote Link to comment Share on other sites More sharing options...
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