merged a bunch of threads together so you can open this thread together and search a single brand or compare a bunch of them in one place.

 

Locking percent on a CLSD is only adjustable off the car. The Nismo 1.5 LSD has an on-the-car preload adjustment but that's not something you adjust between track sessions. Its more an adjustment from street to track and back again. Having run one of these Nismo units in my 350Z the range of adjustment on the peload is not significant.

 

it would take a pretty advanced driver, on a thoroughly sorted car, and knowing what tracks to try what settings at, to justify playing with lockup on the diff. I've never once adjusted the Cusco on my car. Even at it's lowest lockup % it's still roughly more than 2 x the lockup that a brand new factory VLSD has (which only goes down with age)

 

Agreed. It basically requires a different complete rear end setup for each lockup percent and two days of testing at a track to determine the optimal lockup percent. Been there and done that (as crew) with an GrandAm GTO Viper team back in 2000. Viper diffs are frickin' heavy and I swapped five diffs over two days and the team determined that the original setup in the car (as recommended by Neil Hanniman at Dodge Motorsports) was the best. Teams of engineers with computers often get it right. :-)

 

yeah no fun at all!

when we were involved on one of the many E46's running in World Challenge a few years back, I recall we had a few different diff setups...and even those were heavy! All we had to go off was driver feedback, zero datalogging lolol - a bit old school

 

As crew I was always very, very worried when the driver showed up on Thursday and said, "I have this great idea about how to make the car handle better..." and he's holding a car magazine.

 

lolololol - you knew our driver I see

he knew how to use google, that was his biggest issue. Instead of improving him, he always tried improving the car...meanwhile, as often happens, the car was more capable than the driver

 

Marty,

You might want to stick this thread. Thanks for merging them all together for us.

 

thought about it but I am worried about too many stickies

 

short question: Do I have better traction straight ahead with a helical lsd like Quaife? coz im turboed and have a non lsd base model .

 

I could be wrong but I don't think LSD's assist with straight-ahead performance. I thought they were for putting traction to the wheel with least resistance (mostly in turns). I guess it might be somewhat helpful for straights?

 

Yes. Any LSD will give you better traction than open diff. Helicals are usually preffered for OEM type applications where they want smooth operation. Clutch type LSD will actually give more grip but is a more aggressive feel depending on how it's set up. I've always ran clutch type LSD in my rwd cars, only tried helical in fwd cars and a few porsches.. not a big fan.

You are wrong.
Open diff = one wheel burnout
LSD = two wheel burnout

 

got it, makes sense.

 

Yes I am bumping a REALLY old thread

I am stuck, I cant decide between the OS GIKEN and CUSCO RS

any benefit between one or the other, any reason I would specifically want to choose one or the other?

 

Hey I got a question.
I just got a Cusco RS LSD at 80% and I wanna fill it with Motul 90PA.

Will this be awesome?

 

What is to decide on if OS is in your budget?

 

OS - a bit smoother engagement vs Cusco (its close but the OS is a touch smoother). Any adjustments have to really be done by OS, which means taking the diff out and sending it back to them unless there is an authorized OS 'pro technical' shop in your area.

Cusco - user adjustable for lockup (60,80,100% in manual cars), and for direction (adjustable from 1.5 to 2 way) Diff has to come out to make lockup adjustments, but can still be done by the user (instructions provided on restacking the plates)

Both work extremely well

 

What config is the OS shipped with?

 

1.5 way 100%

 

Wow, so you purchase the unit and then have to send it in for re-config, or can you choose your config at the time of purchase?