Learn me about differentials...

clintfocus

Even a torsen can fail the wrong way and lock itself. Usually failures like that are from over heating

FL 4Motion

I'm currently going round and round in my head as to which LSD to upgrade to myself. I'm currently leaning towards the quaife b/c of the low maintenance but I'm afraid down the line I might wind up switching it out again for a "better" performing one like the OSG or nismo.

clintfocus

all the positive reasons people go quaife instead of clutch type are valid, and i myself even did that on past track car i had, and it was nice for the time i had on it. then i went clutch type and ill never go back HAHA

Driftomodachi

Helical only locks up 1 wheel at a time. Clutch type locks the whole axle. OS Giken has the most clutch plates. An aftermarket clutch type diff lets the car put down all of the power right away. No need to mess with anything else. But upgrading the diff bushings and to the finned diff cover are great ideas

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dP3NGU1N

Clint, I'm assuming you're on the OSG. How many miles do you have on it so far and have you ever had to service it (other than oil change)? Everyone is scared of the maintenance of clutch type LSDs but I don't know anyone who's had to service an OSG one yet. The same cannot be said for carbonetic and nismo, however.

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clintfocus

No im not on a OS Giken, but ive driven on several in FWD, AWD, and RWD cars. Im actually on a Cusco Type RS, but mine is custom tuned. Im pushing the OS since its prolly the least maintenance from the get go. The Cusco is setup too tight for proper road course grip, but its easy to open and tune and even comes with instructions on how to, but most people here dont want to tune there diffs. OS giken's cannot be tuned privately, only by sending to OS. FYI ive had my Cusco for over a year now, lots of DD and track days and still no issues, just changing fluid.

Rangerz

Clint do you run the rs-spec f ? Just quicly looked at the cusco site and the spec f looked to be kinda road course specific. Do you also have to modify stub shafts or any other stock parts?

when you had yours tuned what torque were finally set at?

alot of questions I know just really interested in this LSD.

thanks

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clintfocus

my car is still full interior and my exhaust isnt that loud, its a very subtle diff whine. i dont mind and i still street drive the car often.

i have the Type RS, i dont see a "spec F". mine is capable of 1.5 or 2 way if that clears up anything.

with the cusco diff no sub axle modding or replacing needs to happen, my OE VLSD stubs work with the LSD as is.

i have my RS set at 1.5 way, 80% lock, with 6 out of 12 ramp up springs in place for a smooth and progressive lock engagement. Also my Clutches are WPC treated for smoother operation and less heat.

Wonka2581

Sub'd....

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Rangerz

*****************************************/ID/2966/Project-370Z-Improving-Grip-by-Tuning-a-Cusco-RS-LSD.aspx

Just found this because of new interest...


Looks like these guys tuned at 6 spring and 80 % as well. He mentions a treatment for the clut h pack that provides more life and smoother operation. I think the type F that I mentioned is similar as the discs are polished from the factory maybe a new option.

Thanks for the info Clint.

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Stillen Gen III/ NST/ Fast Intentions Non-Res HFC & 12" Resonated CF TDX/ Setreb series 9 OC/ SPL upper control arms/ Whiteline front & rear swaybars/ Uprev tuned by Seb@specialtyZ/ 319HP 262TQ/ Z1 PS Cooler/ Z1 SS Premium break lines/ CJM Road Race pump/Carbotech F:XP10 R:XP8 Nismo OC DIY

Rangerz

Im not sure if you can really make a call as to this treatment being all that the article says, having had it from the start but, any impressions on it being smooth and being able to run longer and harder?

If you don't mind answering how much extra was the WPC treated discs?

And the maint is not all that hard at all once you get it set where you want it. Oil changes but that is all of a 15-20 min job just do it every third oil change or 10,000 mi after break in.

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Stillen Gen III/ NST/ Fast Intentions Non-Res HFC & 12" Resonated CF TDX/ Setreb series 9 OC/ SPL upper control arms/ Whiteline front & rear swaybars/ Uprev tuned by Seb@specialtyZ/ 319HP 262TQ/ Z1 PS Cooler/ Z1 SS Premium break lines/ CJM Road Race pump/Carbotech F:XP10 R:XP8 Nismo OC DIY

Rangerz

Clintfocus and I had discussed the WPC coating that he had done on his LSD. The coating provides smoother operation and wear resistance. This is a link to the Cusco Manual and at the bottom, page 14 I think, the Type-F is mentioned. Along the same lines as WPC coating except it is a machine polished surface. I just wanted to add this to the discussion:

Cusco USA http://www.cuscousainc.com/downloads..._lsd_guide.pdf

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Stillen Gen III/ NST/ Fast Intentions Non-Res HFC & 12" Resonated CF TDX/ Setreb series 9 OC/ SPL upper control arms/ Whiteline front & rear swaybars/ Uprev tuned by Seb@specialtyZ/ 319HP 262TQ/ Z1 PS Cooler/ Z1 SS Premium break lines/ CJM Road Race pump/Carbotech F:XP10 R:XP8 Nismo OC DIY

clintfocus

im on the solid SPL diff bushings too, but some people i dont think can deal with the low super charger style whine from the ring pinion once you go solid lol. but then again i dont know how the NVH is after the whiteline poly diff bushings is in comparision

Chuck33079

You can't hear a difference with the whiteline ones.

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clintfocus

that being the case the whitelines are better for a DD