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Calmini R180 LSD


Cobra_Tim

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Anyone know if this is a viable option for us poor suckers stuck with R180 diffs?

 

I called the company and they say they get some orders from Zcar folks Down Under but never any orders state side. The were unsure if it fits our diffs.

 

This would be for an ITS car BTW.

 

*edit* http://www.purenissan.com/r180_lsd1.htm

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That is the Nissan LSD. There was a change in the ring gear size, I think it happened in the mid 70s (76???) and after this the ID of the ring gear changed. This has been discussed before but it's probably been 3 or 4 years. You can look it up. So the issue is that you'd need to have the later R180 for this to fit. Also, the factory that manufactures these supposedly had a fire and there are no more left and the tooling is destroyed (this is as of last fall or so). I'd try to order one and see if they come back telling you it is NLA.

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Right now we have a 4:11 from the front of a 720 pickup in the car. I know about the ring gear sizing change so as long as we had all the proper ring and pinion sets it would work just fine right?

 

Also, we don’t have any race worthy ratios in the older style ring gear ANYWAYS. SO all Id have to do is get a 3.7 and a 3.9 from an old maxima and Id have the 3 ideal ratios in the later style that would fit that LSD unit and it would be 100% ITS legal. Correct?

 

 

The guy on the phone told me he had these in stock ready to ship in a day.

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I can't tell you about ITS legal. I'd imagine it would be legal but some sniveler might know how to determine which are the later ones and say that you're using a truck diff in your ITS car. Not sure if that would be an issue or not.

 

If they have them in stock, I believe that would what you're proposing would work. I know no reason why it wouldn't.

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Maybe 16 total? 6 per side already is a bunch. The Powerbrute R200's are 3 per side. I think stock was 1 and 2 friction disks, but don't quote me on that. Wonder if there is an appreciable difference in the torque the R200 clutch units can take compared to the R180. What I mean is what is the equivalent number of R200 disks when compared to the R180 disks. Anyone know the diameter of disks?

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Maybe 16 total? 6 per side already is a bunch. The Powerbrute R200's are 3 per side. I think stock was 1 and 2 friction disks, but don't quote me on that. Wonder if there is an appreciable difference in the torque the R200 clutch units can take compared to the R180. What I mean is what is the equivalent number of R200 disks when compared to the R180 disks. Anyone know the diameter of disks?

 

yeah that's what i meant, as opposed to 12. LOL

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Im not worried about the legality part... this I no wont be a problem as the rules state anything that fits in an un modified, stock housing, is legal.

 

I just want to verify that this will indeed work with the 710/maxima ring gears.

You could have them measure the carrier.

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