yo2001 Posted November 19, 2003 Share Posted November 19, 2003 How much power can R180 can handle? TQ wise? I've been thinking about swapping R180 in my car lately. My can got little bit over 300ft/lb (dynoed 275ft/lb) Thanks Quote Link to comment Share on other sites More sharing options...
JMortensen Posted November 19, 2003 Share Posted November 19, 2003 I wouldn't do it. I've seen N/A 2.8's blow up R180's in 2 different Z's. They were autox cars too, not drag racers. One guy destroyed the Nissan LSD. The carrier grenaded on him, but he's also the only guy I've known who broke a mustache bar. Let's just say he liked to light em up. Jon Quote Link to comment Share on other sites More sharing options...
johnc Posted November 19, 2003 Share Posted November 19, 2003 I'm running 305hp and about 260 ft. lbs. throught my R180 with a Quaife ATB. All track and autocross use. 15 hours so far without any problems. I'm running Redline Shockproof gear oil and change it every 5 hours. Most R180s in the US have a two pinion differential which is weak and will go boom. If you've installed the Nissan Comp "competition" clutch pack LSD or installed a Quaife then you've got a much stronger differential and it can handle more torque. FYI... there are two Nissan Comp clutch pack LSDs. They sold a "street" version that has two pinions and a "competition" verstion that has 4 pinions. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted November 19, 2003 Share Posted November 19, 2003 If that's anything like a Ford 9" you should be able to buy the other cross pin shaft, the other pinion gears, and the thrust washers and convert to 4 pinion. Do you know if that is correct John? Jon Quote Link to comment Share on other sites More sharing options...
johnc Posted November 19, 2003 Share Posted November 19, 2003 Don't know. Quote Link to comment Share on other sites More sharing options...
Guest zfan Posted November 19, 2003 Share Posted November 19, 2003 The first time I went to the track, 1/4 mile track I grenaded the r180 on my very first launch. The car had a sbc 350/700r4 combo with 250 hp to the rear wheels. Mike Quote Link to comment Share on other sites More sharing options...
Guest MistressMotorsports Posted November 19, 2003 Share Posted November 19, 2003 I would think that, unless you're drag racing, an R180 would hold up to your power and torque. I have a full race 3.0 with 305 hp and 270 ft-lbs torque. After 6 full race weekends this year, my welded, but otherwise stock R180 looks brand new inside. I took it to Unitrax for routine maintenance last month, all they did was replace the seals. I use Royal Purple 75/90 with no external cooling. I wouldn't really know how an R180 would hold up to drag launches, but it seems to be great for road racing. Given the approximate 30 pounds weight difference between an R180 and an R200, plus the fact that the R180 has better axle geometry, I wouldn't switch unless I absolutely needed to. Mike Quote Link to comment Share on other sites More sharing options...
yo2001 Posted November 19, 2003 Author Share Posted November 19, 2003 thanks for the reply guys. here is the reason why I was thinking about it. Subaru LSD with 3.70 gears. it looks like a direct bolt on a Zcar. with correct M-bar and things. It's cheap and it's LSD. I wander if the diff has been upgraded enough to take the abuse? I've seen pretty hard launch out of WRX's Quote Link to comment Share on other sites More sharing options...
JMortensen Posted November 19, 2003 Share Posted November 19, 2003 That should be an R160... Jon Quote Link to comment Share on other sites More sharing options...
yo2001 Posted November 19, 2003 Author Share Posted November 19, 2003 I think this is R180 right? Quote Link to comment Share on other sites More sharing options...
yo2001 Posted November 19, 2003 Author Share Posted November 19, 2003 Another Quote Link to comment Share on other sites More sharing options...
JMortensen Posted November 19, 2003 Share Posted November 19, 2003 They use 160's in the WRX, the XT turbo, and even the big Outback wagon. I'm not aware of any 180's being used on stock vechicles, although I did hear that they used them in the WRC cars. I think you've got a 160. Sell that puppy to a 510 guy. They love em. Jon Quote Link to comment Share on other sites More sharing options...
JMortensen Posted November 19, 2003 Share Posted November 19, 2003 Pull the cover and measure the ring gear. Just hold a ruler up next to it. Should be like 6 1/4" diameter if it is a 160. Jon Quote Link to comment Share on other sites More sharing options...
yo2001 Posted November 19, 2003 Author Share Posted November 19, 2003 Well good thing I didn't just buy it. Thanks for the info Quote Link to comment Share on other sites More sharing options...
JMortensen Posted November 19, 2003 Share Posted November 19, 2003 Sorry to burst your bubble. Jon Quote Link to comment Share on other sites More sharing options...
Drax240z Posted November 19, 2003 Share Posted November 19, 2003 Yep, R160. But not all is lost. A local Z guy is running one of these R160 LSD units in his 240z in heavy autocross use. He's running a fairly hot 2.8L triple setup that I would estimate is in the area of 180-190rwhp. He's run 2 full autocross seasons with this diff, and is running A032's. He's a smooth driver but isn't afraid to put the hammer down too. However with that said, I've long ago decided that it would be too weak for a turbo application... or at least too weak for me to spend money trying it. Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted November 20, 2003 Share Posted November 20, 2003 If the search function is working today, there are some old posts from Z guys running the Subaru R160's in their Z's. They considered it their secret weapon, a cheap source of readily available LSD's. You can probably buy 2 or maybe 3 of those for the price of one new R200 LSD. The old posts also pointed out that an automatic tranny will greatly reduce the "shock" on the diffs. Thus an R160 might live longer with an auto. Also from past posts, when R180's "grenade", they usually fail in the spider gears. As someone said, it is the "one wheel burnouts in the bleach box" that kill them. I figured welding an R180 would completely eliminate that concern. But what I have wondered is if putting a Quaiffe into an R180 wouldn't be the hot ticket. The R200 is a hell of a lot heavier. As for gear oil, how important is that with a Quaiffe or welded diff? Clutch pack, or even viscous, LSD's have to dissipate the heat from the slipping clutches. Thus those guys will overheat and burn up. But the ATB and welded diffs shouldn't have that problem. Just cheap insurance? Quote Link to comment Share on other sites More sharing options...
Guest MistressMotorsports Posted November 20, 2003 Share Posted November 20, 2003 Sup Dog, good question. With my welded diff, gear oil is probably not very important. I run good stuff out of habit, and because it's cheap insurance. I change the fluid once each year, so the cost is minimal. Guys I know with Quaiffes see some pretty high temps, and many have resorted to external coolers, so I would think good fluid is really important there. Mike Quote Link to comment Share on other sites More sharing options...
Savage42 Posted November 24, 2003 Share Posted November 24, 2003 Well, here's a fact to just how strong those R160 LSDs are. As mentioned before, every diff I've seen blow up was an open diff and the spider gears blew apart. I've run the Subie (R160) LSDs for over a decade. Currently, it's in my 510 that I sold last year. My 510 has a VG30 turbo that was putting out 300 ft lbs at the wheels, putting engine torque at nearly 400 ft lbs. HP was 325 at the flywheel. The car has Z32 16" wheels with 245s in the rear and is a 5 speed car. I've run the car hard for 2 years, set a hillclimb record here in Oregon, ran autocrosses (those events on race tires) and daily driven. When I first got it, I did a 2nd gear, 150 ft power-brake burnout on video and done all this since. It's has several track days and a total of 4 years later is still fine. I'm working on getting hybrid on the road and would go with it as the V8 torque is the same, but will have an automatic. I'm going with an R180 because of the CV conversion, nothing else. So, there you go. If you can get a good deal on that diff, I'd go that way. I can usually find them for $150-225. Just put some Amzoil or Redline in it and you should be fine. Quote Link to comment Share on other sites More sharing options...
Drax240z Posted November 24, 2003 Share Posted November 24, 2003 Hey Gary, good to hear someone chime in that has used that diff and pushed it. I'm curious about your VG30DET 510, got any pics you can post or email? What did you do to get clearence at the steering box? We've got one in progress here and have converted it to rack & pinion, and a Z crossmember... I'm curious to see how you've done yours. Quote Link to comment Share on other sites More sharing options...
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