Lotus Elan and Lotus Elan Plus 2 Forums

Hi

Has someone experience with a Quaife LSD? Is it a good improvement for a fast road car?
I?m restoring my S3 and want to improve the engine to 140-150 hp with a good suspension. And I don?t know if it is a good improvement...

Regards

Diego

yes, it is in my opinion.

One point to keep in mind, which should not affect a fast road preparation, is that when one wheel is off the ground it does not operate anymore.

I have the ATB diff in mine with the 3.54 gear set. Cant fault it.

Quaife ATBs are unbreakable. I used one for years on my MGB...and they are undetectably progressive. Burton offer good deals on new ones (no affiliation).

pauljones wrote:I have the ATB diff in mine with the 3.54 gear set. Cant fault it.

Me too !

I have a Quaife ATB (LSD) in my S4 with a 3.77 diff and high power street motor (181 hp,143 torque). The ATB is very helpful in getting the power to the road. Seems like you would want to also have the CV conversion as well.

The ATB is seamless. No noise, no abrupt changes.

I would recommend it for your higher power motor.

Ditto re. the 3.77 Quaife ATB , ran it for years in my Plus2 ( now in the 2.0 Zetec Minor )

https://www.burtonpower.com/quaife-atb.html

John

I would echo the above positive comments and agree you need solid drive shafts. I have a quaife atb in my s4 and launching off the line is spectacular compared with a standard car. One thing no one else has mentioned is it does marginally increase the natural slight understeer of the car; I found using harder rear shocks counteracted this somewhat. If you like thrashing your Elan it's a very good mod, especially using the 3.7 cwp. If you just want to pootle around between classic car show concourse events, then not really necessary.

I would agree with the above (positive benefit for fast road use, not necessary for general road use). However for competition use it is inferior, in my experience, to a plate LSD. As mentioned above, with a Quaife atb, a partially unweighted inside wheel on hard cornering will still spin up like an open diff.
Malcolm

englishmaninwales wrote:I would agree with the above (positive benefit for fast road use, not necessary for general road use). However for competition use it is inferior, in my experience, to a plate LSD. As mentioned above, with a Quaife atb, a partially unweighted inside wheel on hard cornering will still spin up like an open diff.
Malcolm

I find that even with a partially unweighted inner wheel the Quaiffe LSD still gets power to the ground Ok. The inner wheel will slip a little but once that happens you get torque to the other wheel. This is much better than an open diff. Maybe not as good as a plate LSD diff in some circumstances but probably also better in others

cheers
Rohan