LSD recommendations, LSD reccomendations Options

[Charles Freeborn]

Greetings.
While my engine is out for top end refresh I'm also planning on installing a limited slip diff.
What have people run and why? Obvious choices are Guard (true LSD) Quaif, Wavetrac (Torque bias). Pros / cons of those types? I've heard the TB is easier on the rest of the gearbox. Not too concerned about having to run LSD additive as the fluids get regular service anyway (every event).
Quick rundown of the car:
100% track use (not street legal) Little to no AX - all road course.
2.0L 4 cyl with fairly extensive mods. Estimated hp around 150.
901 side shift with AFKSX gearsets.
Car weighs approx 1700 lbs (18 & change with me in it)
Currently running Toyo RR 225/50 slicks. May step up to Hoosiers if I get more serious about racing. I've got another set of wheels for running in the wet with R888R's. Not great rain tires, but that's what's on those wheels now. When they're done I'll probably switch to RA1's.

Thanks!

[brant]

Hi Charles...

a touchy subject actually
there have been lots of previous arguments over what is best.


when I was trying to make the same decision for myself...
I had a conversation with Paul Guard years ago...
he told me that in a mid engine car the TB could be faster...
this was in response to my pointing out that the clutch LSD was the defacto and widely publicized as the best differential for track use

Paul pointed out that this was absolutely true on a 911 rear weight bias

I went with the Quaif on my vintage racer teener.

Prior to the Quaif about 8 years ago... I previously raced (for about 5 seasons) a 2.0 (AJRS motor) 4cylinder 914 with a welded-locked diff. It was different but ultimately faster than an open diff. Took me a little while to learn how to drive it since it was so different.

[Charles Freeborn]

I'm leaning towards a TB unit too - or just leave the open dif in for this season.. Not enough hp for wheel spin to be an issue.

I've driven a welded dif car once (vintage Alfa), and yep that was an interesting feeling. Had a dog box too. That car didn't like anything less than WOT. Was a blast, but not for the faint of heart or easily distracted..

Thanks for the input. I think I'll look at the Quaif, Guard and Wavetrac TB's. They all swear they're the best, so there's a little wheat / chaff separating to be done.

Cheers!

Hi Charles...

a touchy subject actually
there have been lots of previous arguments over what is best.


when I was trying to make the same decision for myself...
I had a conversation with Paul Guard years ago...
he told me that in a mid engine car the TB could be faster...
this was in response to my pointing out that the clutch LSD was the defacto and widely publicized as the best differential for track use

Paul pointed out that this was absolutely true on a 911 rear weight bias

I went with the Quaif on my vintage racer teener.

Prior to the Quaif about 8 years ago... I previously raced (for about 5 seasons) a 2.0 (AJRS motor) 4cylinder 914 with a welded-locked diff. It was different but ultimately faster than an open diff. Took me a little while to learn how to drive it since it was so different.