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2.3 vs 2.5 LSD Differences?
Topic Started: Tue Jul 26, 2011 7:22 pm (1,643 Views)
boXXer
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Hi chaps! My first post on this particular forum so dont gun me down :lol: Although i did see your web address advertised on some of the cossies at the retro show @ santa pod (i was running a drift taxi in the drift arena).

Anyway, My dad is building a 190e based trackcar, and he has asked me to have a look on the web to see the differences between the 2.3 and 2.5 Hydro diffs, but i cant seem to find much info about them.....

now the question i ask is, i have seen the 2.5 "asd" version is 25-30% locked when the ecu/lines are disconnected. Does anyone know the percentage lock of the 2.3's at all? and would it be better just buying a 2.3 diff rather than the 2.5 diff if it has more mechanical lock? i have a 3dr cosworth and the LSD (viscous type) is pretty poor. if you launch it at anything over 20 degrees steering lock it will just spin up one wheel and is very annoying, although its fine once you have wound up some speed.

Also, do you guys use B373 in your diffs or something else?

Cheers and sorry for all the Q's!
Edited by boXXer, Tue Jul 26, 2011 7:24 pm.
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85matt190
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the ASD is identical to the standard LSD when not getting readings from the ECU. but if you install the rest of the ASD electrical components, it will give up to 100% locking on takeoff and when slower than ~25mph or somewhere in that range.

Others have converted ASD using hydraulic pumps like a master cylinder to "pump up" the amount of locking while driving, using a small lever mounted near the handbrake lever. I think this is a very clever idea....


others have increased the locking of standard LSDs by installing springblocks to give up to 50+% locking. its a very simple design as well, but it may be a good iead to install a diff cooler so your springs keep their strength
Edited by 85matt190, Tue Jul 26, 2011 8:50 pm.
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boXXer
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thanks for your reply mate. Will let him know as he has chance of buying a good 2.5 thats complete!
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85matt190
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i'll try to find a link to where I saw that manual hydraulic conversion. It was in a car used occasionally for drifting or perhaps rallying iirc. If I can find it, I'll post it up for you here
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85matt190
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http://190rev.net/forums/showthread.php?t=26930
check out bobf's post (should have known he would come up with something so simple yet ingenious) where he describes manually activating an ASD diff. leaves out the need for installing the hydraulic pump and wheel speed sensors..



http://190rev.net/forums/showthread.php?t=34114
this thread describes how the spring blocks work in a standard LSD. though I havent seen that member in a while, so you'll need to make them yourself with some thick aluminum and some valve springs, or have them made for you...
Edited by 85matt190, Wed Jul 27, 2011 1:52 am.
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boXXer
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ahhh thanks very much for your help with this, much appreciated :)
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85matt190
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sure thing. I saw you said it is for a track car, but you mentioned drifting, so I was wondering if drifting was the primary purpose of this car. If that would be the case, your best bet would be to simply find an open diff from any standard 190 and weld the splines. Others here in the US have done this to dedicated drift cars with alot of success.
The open diff is readily available, and practically a throw away item, so it saves you money there, plus there are no expensive clutch disks to replace (needs to be done ALOT if locking up the LSDs frequently) and its essentially bulletproof 100% lock.
Not good for driving around town, but switching them out isn't terribly difficult...
just a suggestion
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