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Old 17-07-2017, 12:14 PM
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smileyinside smileyinside is offline
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Limited Slip Diffs

Looking through the club archives, there is much discussion on this topic. I also found a superb write up on the variations of the diffs Nissan made + types of LSDs used. Thought it may be of interest:

http://forums.hybridz.org/topic/5049...iff-mount-faq/


So come on experienced heads, what would you use on a road going R200 diff without silly torque / power?

Also it seems like LSDs have produced diff whine in the past.

Would something like this just drop into a long nosed R200? It looks like a good / relatively inexpensive option. Although I know you get what you pay for so what's the catch?!?

www.ebay.com/itm/352047622866?_mwBanner=1


From what I gather:

Clutch versions (CLSDs) need maintenance,generate lots of heat and can be quite aggressive , especially at low speed causing understeer.

The Quaife ones are great but being one way have shortcomings when wheel lift occurs. Although I can imagine the lifetime warranty (even if raced) is attractive to the club "strippers".

OS Giken - awesome but out of the average price range.

http://www.ebay.com/p/os-giken-super...d=221965837121

KAAS/Cusco- plate based but durable and do 1.5 and 2 way, with the 1.5 being the most suitable for the likes of me just "road racing" and the odd track day.

Nissan Viscous LSDs - are the smoothest but apparently generate lots of heat and can cause leaks / need some kind of external storage for the LSD fluid (is that last bit right?) hence you can vary viscosity.
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Old 17-07-2017, 01:52 PM
Moriarty Moriarty is offline
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Quote:
The Quaife ones are great but being one way have shortcomings when wheel lift occurs
My question is how often do you lift a wheel on a rear wheel car with IRS especially a street driven car

I run a Quaife in the race car and much prefer it over a clutch pack (swopped in, tried it, didn't like the understeer or the backend under engine braking, or the noise and swapped back to Quaife)

Cons with a clutch pack
Heat
Clutch pack wear and cost of replacement
Did I mention heat
Specific oil must be used
Dinosaur technology, recommended by dinosaurs
Adjustment to get the sweet spot right (street, track, shopping, polishing chrome in a field) they all have different requirements

Pros with Quaife
Non of the above

Cons with Quaife
Customer service

Did I mention I like ATB units
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Old 17-07-2017, 01:56 PM
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smileyinside smileyinside is offline
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Limited Slip Diffs

Buddy you absolutely cracked me up!! 👍👍👍

Thanks for the great advice as ever.
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Old 17-07-2017, 07:25 PM
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Don't forget Subaru r180 they fit with modified stub axles
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Old 17-07-2017, 07:33 PM
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Quote:
Originally Posted by moggy240 View Post
Don't forget Subaru r180 they fit with modified stub axles


Is it the same modified stub axles that are needed for the r200 short nose diff?
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Old 17-07-2017, 07:47 PM
franky franky is offline
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Quote:
Originally Posted by Moriarty View Post
My question is how often do you lift a wheel on a rear wheel car with IRS especially a street driven car

I run a Quaife in the race car and much prefer it over a clutch pack (swopped in, tried it, didn't like the understeer or the backend under engine braking, or the noise and swapped back to Quaife)

Cons with a clutch pack
Heat
Clutch pack wear and cost of replacement
Did I mention heat
Specific oil must be used
Dinosaur technology, recommended by dinosaurs
Adjustment to get the sweet spot right (street, track, shopping, polishing chrome in a field) they all have different requirements

Pros with Quaife
Non of the above

Cons with Quaife
Customer service

Did I mention I like ATB units
I've ran plates units in all my toy cars, no issues. They're still the choice for a lot of manufacturers also.
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Old 17-07-2017, 08:36 PM
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I'm not experienced enough to tell you what is good or bad but I do have experience with both a quaife and a plate in longnose R200's. The plate diff seams to be the preferred choice for those that are experienced enough and have the ability to know exactly how to set the diff for their specific use and be happy enough to keep taking it apart for adjustments. This is why I'm running the fit and forget quaife in my blue car. There are a few things I don't like about the quaife but put up with. It has a lot of play inside the diff due to the helical gears moving up and down in their pockets. I don't like the fact that only one wheel spins during a burnout at the drag strip so I only get one sticky tyre. Customer service, as already mentioned. I don't like how noisy it is. This is actually not an issue with the quaife but as a result of the gears not meshing exactly as they have done for the last 35+years due to changing the differential section.

I will be using the plate R200 I have in the 280z I'm building but only to it needing an LSD (4.3lt V8 torque) and I happen to have it. For the orange car I'm building I'll probably go for a Subaru R180 lsd as it should be quiet and will work out slightly less than the quaife.
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Old 17-07-2017, 10:09 PM
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Cons of an ATM - not homologated for 'serious' racing.

I had a clutch pack and am turning to a Scooby hydraulic unit to be a nicer road car.
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Old 17-07-2017, 10:24 PM
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smileyinside smileyinside is offline
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Limited Slip Diffs

Great to hear all your experienced thoughts chaps.


Looks like the scooby diff can be had for half the price of a Quaife, so I can see the attraction; and the stubs are readily available with a quick Google search.

So here's a question: the Subaru has a 4.444 final drive. That's a 20% difference to the say 3.7 I'm supposed to have in a 260z (or is it 3.5 and 21%?).

Isn't that going to totally mess with the drivability of the car? Will it become like a diesel in first gear? And a Corsa Sri of the 90s in 5th? (That car used to sit well over 5500RPM at 90mph!)

Has anyone done that conversion and can opine?
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Old 17-07-2017, 10:33 PM
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Quote:
Originally Posted by smileyinside View Post
So here's a question: the Subaru has a 4.444 final drive.
Ballocks !

Mine'll be a 3.54 - lovely in 5th gear.
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Old 17-07-2017, 10:38 PM
franky franky is offline
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Quote:
Originally Posted by smileyinside View Post
Great to hear all your experienced thoughts chaps.


Looks like the scooby diff can be had for half the price of a Quaife, so I can see the attraction; and the stubs are readily available with a quick Google search.

So here's a question: the Subaru has a 4.444 final drive. That's a 20% difference to the say 3.7 I'm supposed to have in a 260z (or is it 3.5 and 21%?).

Isn't that going to totally mess with the drivability of the car? Will it become like a diesel in first gear? And a Corsa Sri of the 90s in 5th? (That car used to sit well over 5500RPM at 90mph!)

Has anyone done that conversion and can opine?
google a gearing calculator.

I've gone for a 4.44 as it suits the 5 speed box, still gives a top speed of 140ish mph.

Should provide great in gear thrust.

Seems seans going for an american 'wide ratio' option
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Old 17-07-2017, 10:42 PM
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smileyinside smileyinside is offline
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Limited Slip Diffs

Quote:
Originally Posted by SeanDezart View Post
Ballocks !



Mine'll be a 3.54 - lovely in 5th gear.


You kiss your mother with that mouth!?

The one I found was 4.444 but I now realise the error of my ways!

Quote:
Originally Posted by franky View Post
google a gearing calculator.

I've gone for a 4.44 as it suits the 5 speed box, still gives a top speed of 140ish mph.

Should provide great in gear thrust.

Seems seans going for an american 'wide ratio' option


So did you have to mod drive shaft and any mounting points?
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Old 17-07-2017, 10:46 PM
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Quote:
Originally Posted by smileyinside View Post
You kiss your mother with that mouth!?
Not on the mouth !

Sean won't need to be screaming and bouncing valves all over the place to reach140mph and tell me where you can do that in the UK nowadays ?

Besides, Seanie has a stack of diffs at home - those are parts like quick-shifts that can be changed relatively rapidly if I feel the need to become more sporty like The Kid here.
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Old 17-07-2017, 10:49 PM
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smileyinside smileyinside is offline
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A stunning write up: http://www.kangamotorsports.com/blog...p-differential


From hybridZ site:

"after 2 hours of searching on mostly subaru sites here is the list that I have come up with:

year / ratio / type / painted marking on case

2004 / 3.9 / clutch / HK?
2005 / 3.9 / clutch / ?
2006 / 3.54 / clutch / HX
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Old 17-07-2017, 10:57 PM
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SeanDezart SeanDezart is online now
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I have a few sets of John Williams stub axels - lovely chap.
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