Reply With QuoteThe engine and how hard it revs are the thing you left out.
Is it a V8 that revs to 5000rpm? or a turbo F20C that revs to 9000?
Ae86 300hp diff ratio questions
Hi i have a ae86 and has made 300hp atw im wanting to take it to the track so want the best out of it was thinking a 3.9 ratio diff head lsd, or 4.1 can i have peoples thoughts and any help would be great thanks im running a w55 gbox and hilux diff.
The engine and how hard it revs are the thing you left out.
Is it a V8 that revs to 5000rpm? or a turbo F20C that revs to 9000?
RT142 Estate.
AJPS.
Sorry its a 4age turbo revs to 7500rpm max limiter
Given the torque that the engine should have I would be sticking with the 3.9 mine has around 240hp atw with a w57 and BW with 3.9 and KAAZ 2 Way and it matches pretty well on the track.
Hilux diffs are heavy, but handle the power well.
Ae86 Drivingclub - Toyota AE86 Car Club where AE86 | KE70 | Toyota 86 / GT86 | Subaru BRZ | Scion FRS owners
and tons of different ratios for cheap
OK yea i was leaning towards the 3.9 ill just have a standard hilux lsd in there but should do the job might get it shimmed up to be abit more tight, What diff are you running to have the KAAZ lsd? Cheers for the feed back
Yea im not worried about the weight just dont wanna be breaking diffs all the time, and yes diffs are fairly cheap and easy to get, well the 3.9 ratio isnt easy to find but other ratios are.
Nathan, it is a cut down Commodore Borg Warner diff. Very similar to the R31 Skyline diff. It is a reasonably easy conversion if you can get the diff shortened cheaply. If not some of the Toyota stuff makes more sense as they are not nearly as wide.
There is not that much difference between a 3.9 and 4.1 really at the end of the day. What sort of turbo are you running? How quickly you come on boost and the size of your power band may mean that the 4.1 works better with your engine. Mine boosts early and hard so I am happy with the 3.9 as it will easily pull it along when coming out of corners and actually helps load the engine up a bit.
Cheers
Paul
Im running a td05 evo 2 turbo with a 20g compressor wheel 3" cover 7cm exhaust housing. Comes full boost around 3000rpm all way threw with the cams. Yea im tempted to just run the 4.1 but the 4.1 i do is noisy may need bearings and the crown wheel had rust on it. Can get a 3.9 ut expensive around 500 all up with lsd. Cheers for the help
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