WTB: EVO 1-3 rear diff mechanical LSD centre

[EVO-00X]

Hi guys

Looking to get my hands on an EVO mechanical LSD centre from an EVO 1 RS, or either of the EVO 2 or EVO 3 RS/GSR range (not EVO 1 GSR as they had the crappy viscous LSD centres).

The mechanical LSD must be in good condition as I dont particularly want something flogged out to ********* thats gonna need more $$ spent on shimming (as thats when you begin to weigh up the cost of just going a new aftermarket unit).

cheers
Rob

 

[fatwgn]

i need one too lol

 

[EVO-00X]

Gabe, what gearbox are you going to be using? An EVO or a GSR? OR... an EVO box with a GSR rear diff ratio installed? This will determine whether you need to get a GSR rear diff centre, keep the GSR 3.545 crown and pinion you currently have to chuck into a EVO mech rear LSD, or whether you just get a 3.909 evo rear diff centre and not touch it. It comes down to what box you are planning to use and what diff ratio it\s going to be in it.

 

[fatwgn]

i'm going to be using a evo box with gsr ratio, cause i'm buying a evo 3 halfcut

 

[EVO-00X]

You do know that when you put a GSR (rear diff) ratio in your EVO box your EVO box loses its factory LSD dont you?

 

[fatwgn]

hmmm well that sucks, so you can't put the gsr ratio in the evo box without losing the lsd?

 

[EVO-00X]

Correct. The factory EVO viscous LSD goes bye bye. You will then need to pay some big $$ to get an aftermarket Ralliart, Quaife etc mech LSD put in your gearbox if you wanted LSD up front (but its not recommended for a street car)

Then you will also will require a GSR 3.545 rear diff at the back of the car, or an EVO mech LSD diff that has had the GSR 3.545 crown wheel and pinion installed with it.

Right now I assume you're getting an EVO frontcut with a factory EVO front LSD. You're doing an AWD conversion and you have a spare GSR rear diff housing but it hasnt got a diff centre. In this case you should try and get your hands on an EVO mech LSD rear diff (3.909) and dont touch it at all. What you want is everything to match up as per OEM which is factory front viscous LSD and a mechanical EVO rear LSD

The reason why people put GSR (rear diff) ratio in their EVO boxes is because they are quarter mile cars and want to cross the 400m mark in high rpm 4th gear, without losing a poofteenth of a second by having to change to 5th gear like you would have to if you were using the EVO 3.909 ratio. What you gain in a poofteenth of a second on the 400m track by using the 3.545 GSR ratio, has to be weighed up against what you would gain in handling and traction and acceleration around a track if you were to keep the EVO front LSD and EVO ratios all round.

 

[ENGINR]

Track wise it'd make a bee's dick of difference to the majority of us. I have an open front diff in my EVO gearbox and viscous LSD EVO rear diff and the car handles and accelerates fine around a track.

If anything, a mech rear LSD will make the car want to be too tail happy and prone to snap back on you if pushed and a front mech LSD will turn the gearbox into a shuddering pig that is noisy and clunky to drive on the road.

 

[EVO-00X]

Yep, best avoid front mech LSD's altogether IMO too Shayne - too much ******** to contend with for a majority driven street car. Viscous LSD up front is fine though.

The EVO rear mech LSD isnt as harsh as aftermarket mech LSD's are though Shayne. Having an open front and mech LSD rear the car will have a tendency to oversteer which is fine by me and suits my driving style. I've known people running aftermarket rear mech LSD's though and it takes a lot of practice and time to earn enough experience in using them as if you have an unexperienced driver behind the wheel it cause for disaster.

 

[EVOCPE]

I have the viscous front LSD in my box, but i'll be using the mech rear LSD

 

[EVO-00X]

Thats a normal EVO setup Mik so stick with it.