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914World.com _ 914World Garage _ Limited Slip Diff Question

Posted by: Dominic Aug 1 2004, 08:19 PM

How much HP do you need before you will get your moneys worth out of a LSD ?

Which is the best bang for your buck: QUAIFE or GT ?

Posted by: nine14cats Aug 1 2004, 08:45 PM

I've driven both 2.0 liter car and 914-6 and I'd have to say you can feel the lack of the limited slip on both. It may not always be horsepower that makes a limited slip nice. Also at high speeds on the brakes they seem to make the car handle better.

I have an 80% LSD in my 901. I really like it. It takes a few runs on the auto-x course (if you like that kind of thing), to get used to it, but after you adjust you really feel the difference.

I like em.

Bill P.

Posted by: jgiroux67 Aug 1 2004, 10:19 PM

How much are they and where to get them?

Posted by: campbellcj Aug 1 2004, 10:51 PM

It's got little to do with HP.

Torque and traction are the important factors. If you have a lot of the former, and drive in road and/or track conditions with the latter, then you'll benefit hugely from an LSD.

Popular wisdom is to use a TBD for street or autox, and a real (ZF clutch-type) LSD for serious track duty. I have a GT 80% LSD and it rocks

Posted by: Dominic Aug 2 2004, 03:39 PM

Thanks for all the INFO. I just called GT (Guard Transmission) in Northern California and they quoted me a price of $1175. for a Torque-Biasing Differential. I think I will look into getting one of these when I get the $$ to build my tranny.

I'll just tell the wife it's a Safety thing...I NEED IT !

Posted by: KenH Aug 2 2004, 08:07 PM

Note - that if one of the rear wheels looses contact with the ground, the Torque Bias LSD quits working. The "clutch" type will work under all condtions.

Ken

Posted by: Brad Roberts Aug 2 2004, 09:41 PM

Hey Dominic...

DONT buy the Torque Biasing.. for reasons that Ken explained. Yes.. it is cheaper...

B

Posted by: Dominic Aug 3 2004, 04:39 PM

Brad,
Which would be the better fit for my weekend driver / autocross car: the 40% or 80% LSD ?

Posted by: Brad Roberts Aug 3 2004, 05:04 PM

40% will do just fine.

B