510 2 door... diff posi question

Engine, Transmission and related drivetrain.
rdanard
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510 2 door... diff posi question

Postby rdanard » 28 May 2017 21:35

I have a 1970 2dr 510 KA24de

Just got the car on the road for the first time this weekend. It had a open r160 with 3.7 gears. There's so much power with the KA that I'm just doing one tire fires around every corner and launching.

I've done a lot of research and finding lots of old posts, but I'm asking you guys what your running or what's a good swap to get a posi or lsd??

Much appreciated, Ryan

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funwithmonkeys
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Re: 510 2 door... diff posi question

Postby funwithmonkeys » 28 May 2017 21:46

The Subaru R160 is probably the most common swap. They are pretty easy to find with a Limited slip and all you have to do is swap the axle stubs.
If no one from the future comes back to stop you from doing it then how bad of a decision can it really be?

rdanard
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Re: 510 2 door... diff posi question

Postby rdanard » 29 May 2017 11:26

Thanks, I'll look Into it more. I've always wondered why they havnt made a locker or "lunch box" style kit like they do for 4x4s.

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toylet
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Re: 510 2 door... diff posi question

Postby toylet » 29 May 2017 20:21

Most are going to STI r180 for datsuns because they are plentiful and stronger.

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JordanTr
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Re: 510 2 door... diff posi question

Postby JordanTr » 29 May 2017 22:38

Subaru STI R180s can be found with Torsen and clutch type mechanical LSDs in different ratios in different years.
Jordan | '72 2 door KA project | '94 240sx RB26DETT | '97 Silvia RB25DET | '90 Audi 90 Quattro 20V (DD)

Three B's Racing
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Re: 510 2 door... diff posi question

Postby Three B's Racing » 30 May 2017 07:03

You just need to be aware the STI axle spline count is different and will require a modified diff axles with the correct spline count to bolt up to your dogbone halfshafts or CV axles. There are newer Subi diffs with correct spline count in LSD trim but I don't know which years. I'm running a R180 with 3.54 gear from a automatic Z car behind a 180hp SR20DE S14 engine and it's a one legger and works great, granted I can make a lot of smoke but choose not to what's the point in killing a good tire? I don't track or autocross it any longer so don't see the need for LSD but!!! I do have a R160 LSD with 3:70 ratio that's in great condition I used to run but removed it for the R180 because I thought it was going bad only to find out later it was an exhaust clamp bolt hitting the underbody that made it sound like the diff crap!!!
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MikeY
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Re: 510 2 door... diff posi question

Postby MikeY » 30 May 2017 08:12

https://m.facebook.com/groups/327981873 ... =bookmarks
These stub axles looks like the easiest was to get a newer LSD. If this guy has none as this is an old post I'm sure futofab sells them.

rdanard
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Re: 510 2 door... diff posi question

Postby rdanard » 30 May 2017 11:27

Thanks for all the support! Defiantly going to keep my eye out for some wrecked subarus....

Three B's Racing
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Re: 510 2 door... diff posi question

Postby Three B's Racing » 31 May 2017 05:02

MikeY wrote:https://m.facebook.com/groups/327981873903624?view=permalink&id=1295736200461515&ref=bookmarks
These stub axles looks like the easiest was to get a newer LSD. If this guy has none as this is an old post I'm sure futofab sells them.


Futofab does sell them.
"Lastnight the wife said oh boy when your dead you can't take nothing with you but your soul oh "Think"
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Byron510
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Re: 510 2 door... diff posi question

Postby Byron510 » 31 May 2017 09:17

JordanTr wrote:Subaru STI R180s can be found with Torsen and clutch type mechanical LSDs in different ratios in different years.



Since the topic came up....and this is a good place to post this. Has anyone here actually tried the Subi R189 Torsen diff in their Datsun? I received a phone call from a local 510 guy who found one, but noted that the spline input on once side of the diff appeared to be a stepped spline.
My first thought was how the hell do you machine a stepped spline and why would it need to be there. But I'm sure there is a reason.

I have not seen the application myself, has anyone had their hands on this diff, and will Dave's stub axles from FutoFab work with this diff?

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