kyoo

iTrader: (29)

correct. dont even know who makes a helical rear for the evo. clutch type is the way to go

Dallas J

iTrader: (1)

Most cars with helical rear diffs are somewhat unpredictable. But on an Evo it would be tragic.

kikiturbo

I used to have a Lancia delta integrale.. That one was 4x4 with open front, cetral with 40/60 tq split and viscous lock and rear torsen. It was not unpredictable, far from it, but that is heavily influenced by the central diff... I suspect that the torsen and ACD combo would not work well. Anyway, why change from plate rear...

ronaldo9

iTrader: (2)

I saw a company sells replacement plates for the rear. So I was contemplating the idea of how a helical diff would perform being there's less maintenance involved but seems that will be a downgrade for the evo.

Dallas J

iTrader: (1)

Im just jealous you had a Lancia Delta Integrale

The AWD in general helped predictability too. Its the RWD cars that we seem to have issues with stock torsen rear diffs. Like the RX7 and Mustangs.

But 100%, there's no reason to swap from stock diff restacked. They aren't heavy maintenance items for street cars. For track cars I would swap out to something inner coil springs rather than outer cone springs to keep more constant preload through its life but that's a different discussion.

Dallas J

iTrader: (1)

If its the Weir kit dont bother. They do not hold up.

ronaldo9

iTrader: (2)

Can you confirm if these are the same or superior to the weir plates? https://www.racingdiffs.com/collecti...34705477042338

Dallas J

iTrader: (1)

The stock plates have alternating groove patterns for oil and to create friction. From what I've seen on the Wier kit the smooth plates just polish themselves and then its full slippery (no more LSD action). These being smooth seem like they'd do the same thing but can only speak to the Weir kit not working well.

kaj

iTrader: (60)

Anything is better than Weir. Weir plates, as mentioned above, have no oiling grooves. Mine got hot, welded themselves together, broke the tabs off, and cracked the basket. Utter **** show. And if you contact Weir, they are like
I wasted a ton of money having to but a second diff in order to have TRE build me one good one. F**k Weir.

kikiturbo

this is almost a local company, well ,from a neighboring country anyway... They make good parts and they are the only source of ACD plates too..

kikiturbo

well, it is the car with the most flex in the body that I ever drove.. including convertibles.. I have never seen a car that develops stress cracks on tops and bottoms of A, B and C pillars.

WRC-LVR

iTrader: (1)

YIKES !!! So how do they handle so well at rallies ? Cages is guess. Damn and i thought they were great cars.

kikiturbo

I always said that they were made to be converted to grA rally... Weld in the cage, throw away the suspension and put in some proper arms and you get a great rally car. Bodies liked to rust like crazy.

Overall it is a great car, but torsional stiffness is really low and body just cant handle the power and grip. Superb steering feel.

A guy on integrale forums took his shell to a place that did shell prep for Prodrive, to seamweld and strengthen the original shell, but without the cage. Many $$$ later they ended with a shell that was stiff as stock impreza shell.

tolas

Can anyone answer definitively if a 1.5 way will offer more lift-off/trail-braking oversteer or less? (compared to a 1way)

Dallas J

iTrader: (1)

It depends on your setup. In most cases we'll have inside rear lifting before we get into any appreciable wheel speed differences on the rear axle. Its possible it could help in some braking stability if one wheel locks up? Maybe? Just guessing when it would come into play.

I run a 1way both front and rear.