installing a non Datsun limited slip rear end

70MTRoadster · Post by **70MTRoadster** » Thu Sep 10, 2020 3:39 pm

I am aware of the Mazda RX-7 limited slip swap but are there any others like fords or chevys that have been done to roadsters that have been posted on the forum?

Post by **tjp** » Thu Sep 10, 2020 6:23 pm

I've seen detroit lockers used. They can be had new from summit that fit the Roadster rear end.

david premo · Post by **david premo** » Thu Sep 10, 2020 7:06 pm

Sports Imports has an aftermarket limited slip set up.

Post by **spl310** » Thu Sep 10, 2020 9:38 pm

70mroadster, how much horsepower are you thinking?

fj20spl311 · Post by **fj20spl311** » Thu Sep 10, 2020 9:54 pm

Ford 8, 8.8 and 9 inch rear axles have been done. Also I have seen a Toyota, but I don't remember which one, I think it was a truck with custom axles.
They are all pretty much the same process, shorten the housing, shorten the axles or have custom axles. Brakes and flanges......

eye · Post by **eye** » Fri Sep 11, 2020 6:01 am

Check your PM

TurboRagtop · Post by **TurboRagtop** » Fri Sep 11, 2020 1:03 pm

tjp wrote: ↑Thu Sep 10, 2020 6:23 pm I've seen detroit lockers used. They can be had new from summit that fit the Roadster rear end.

I just called Summit and they struck out on Eaton's website.
Would you have a part number for the detroit locker?
Thanks.

Post by **spl310** » Fri Sep 11, 2020 5:03 pm

OS Giken makes a limited slip to fit a roadster

TurboRagtop · Post by **TurboRagtop** » Sat Sep 12, 2020 12:25 am

spl310 wrote: ↑Fri Sep 11, 2020 5:03 pm OS Giken makes a limited slip to fit a roadster

Anybody have a part number?
Thanks.

Post by **funkaholik** » Sun Sep 13, 2020 10:26 pm

https://whiteheadperformance.com/produc ... rettyPhoto

Not cheap, but here is the OS Giken unit

TurboRagtop · Post by **TurboRagtop** » Tue Sep 15, 2020 10:43 am

Thanks Erik!

Post by **funkaholik** » Thu Sep 17, 2020 7:42 pm

Has anyone on this list installed one of these OS Giken units?
If so, does your car drive $1500 better?
I would be interested in hearing real world pros/cons.

Mike Unger · Post by **Mike Unger** » Fri Sep 18, 2020 7:03 am

funkaholik wrote: ↑Thu Sep 17, 2020 7:42 pm Has anyone on this list installed one of these OS Giken units?
If so, does your car drive $1500 better?
I would be interested in hearing real world pros/cons.

I have a OS Giken in my S2000 race car and it works fine. I use the original Nissan LSDs in the roadster race car. Both are clutch type LSD and are very similar in construction and function. Not sure what your question is about driving $1500 better? Do you need a LSD in your street car? The purpose is to stop the inner rear wheel from spinning up when it loses traction under hard cornering. If your having that issue then it helps with that problem. For me it's worth it on the race car, on the street car not so much.

Alvin · Post by **Alvin** » Fri Sep 18, 2020 1:18 pm

funkaholik wrote: ↑Thu Sep 17, 2020 7:42 pm Has anyone on this list installed one of these OS Giken units?
Yes, a few owners have installed it into their roadsters. I have not, but I have driven.
If so, does your car drive $1500 better?
Is a question of "is it worth it?" For a vintage car I'm sure any of our purchases can be justified.
I would be interested in hearing real world pros/cons.
100% agree with Mike Unger's comments. It's there when you need it. Transparent otherwise. I have the RX-7 setup.

Post by **funkaholik** » Fri Sep 18, 2020 1:27 pm

"For a vintage car I'm sure any of our purchases can be justified."

Ain't that the truth!

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