R180 LSD Conversion

[Andrew_L26]

Hi guys, I've got a shortnose 3.36:1 R180 LSD from a car I'm parting out. Would it be worthwhile swapping out the internals into a longnose housing?

It's going into my 2+2 turbo which I'm hoping for a fair bit of power out of (250kw+)

I was originally going to do an R200 as they're a bit heavier duty and should handle the power much better.

I'm running an RB30 gearbox with the L-series bell housing, pretty standard ratios.

 

Andrew

[d3c0y]

3.36 is crap ratio not worth the effort. At the end of the day all R180s have 180mm crown wheel so not really any stronger than a standard one. For any decent turbo you want an R200.

[KatoKid]

9 hours ago, d3c0y said:

 At the end of the day all R180s have 180mm crown wheel so not really any stronger than a standard one. 

Not technically true. While ring gear size is a factor, lower numeric ratios have more teeth and larger diameter pinion gears which are stronger.

[260DET]

Short nose pinion is too short to fit a long nose diff, the R* series R180 are stronger than the earlier Z 180's, they can be identified by a big R cast into the top of the case. For circuit work that R will take a few hundred horses but go easy on the burnouts. NB * Been ages since I had anything to do with these, I'm fairly sure the big letter is a R.

[Andrew_L26]

31 minutes ago, 260DET said:

Short nose pinion is too short to fit a long nose diff, the R* series R180 are stronger than the earlier Z 180's, they can be identified by a big R cast into the top of the case. For circuit work that R will take a few hundred horses but go easy on the burnouts. NB * Been ages since I had anything to do with these, I'm fairly sure the big letter is a R.

Nah, the letter is a B and there is also an A

 

Not to worry, didn't think it wouldn't be suitable but I just thought I'd double check!

 

Thanks guys,

Andrew

[Riceburner]

It will be a large ‘K’ cast in the top of the diff case, this differentiates it a late R180 with 115mm crown wheel. They were from the mid 80’s onwards. 

[d3c0y]

On 8/28/2018 at 7:24 AM, KatoKid said:

Not technically true. While ring gear size is a factor, lower numeric ratios have more teeth and larger diameter pinion gears which are stronger.

Got me on the old technicality -_-