seanmcr6

This is a cross post from the mod forum. It was suggested I would get more feedback if I posted the question here.

So, Quaife, Wavetrac or Guard for an LSD on a 996 C4S?

https://rennlist.com/forums/performa...t-for-lsd.html

Cheers
sean

KaiB

GT....

al@cpt

Guard without question!

DM993tt

End the search with Guard.

winders

Autocrossing? Guard torque biasing LSD. Big track? Guard clutch type LSD.

Scott

NaroEscape

^^^ what he said

Astroman

This may be a stupid question and slightly OT, but how does an LSD work on a 4WD car?

TRT41

an OEM with GT (Guards) plates.

Geoffrey

factory GT3 Cup (4 plate version), OEM with GT internals, or GT will all function about the same in your car.

JoeMag

Geoffrey -- Any idea if a 993 street diff be rebuilt to function like the GT3 cup one? btw, any idea what the break away torque is on the gt3 cup?

ZSA Motorsport

Guard, Matt, no brainer

Chaos

Purple Haze,Queef

seanmcr6

hmmm, I had no idea the GT3 Cup dif would fit my car....must look into this further!

GTgears

I have a tendency to lean towards a TBD versus an LSD for the AWD 996 cars like the C4 and Turbo, even when using them on the big track. The reason for this is that the AWD cars tend to exhibit more inherent corner entry push than their 2WD counterparts. I know that someone is going to argue with me and tell me that they've got an LSD on their AWD racecar and love it. That's fine, if this was a racecar I wouldnt' debate that point, though the guy arguing with me would most likely have 500 or 600whp and have somewhat of a leg to stand on. He'd also have full race suspension and all other manner of goodies and be someone like Carl Ryquist with track records to back him up.

But back to the point, the corner entry push introduced by the LSD on an AWD DE car just isn't really worth the gains of the lock up under braking, IMO. We sell quite a few TBDs to AWD owners for track day use and they love them because they get more power to the ground and the TBD doesn't really interfere with the handling at all. If you've got fully adjustable coilovers and sway bars and want to play around with retuning your suspension after installation, maybe looking at a clutch type LSD is still worth considering. So, take that FWIW. If it was my personal C4 I'd put a TBD into it.

As for brand, I think I'm a little biased and have to recuse myself from the original question. I suggested this thread get reposted here so that your peers could advise with their opinions and experience since my input on brand is "tainted"...