Guest erol Posted October 27, 2005 Share Posted October 27, 2005 Hi Guy's, I have a 78 260 2+2 and I'm based in the Uk. I am looking to have a RB25 fitted and have concerns to keep the power on the ground. Before you ask, I have looked though the search and some makes sence and some leads to more confusion and questions. What I would like to know is Which diff is recommended for this set up? What needs to be done to fit it? and Where (which model car) can I source this from? I'm sure this will help alot of us, and this could be a thread to consolidate our knowledge on this topic. Sorry for all the questions. Many thanks Erol Quote Link to comment Share on other sites More sharing options...
Phantom Posted October 27, 2005 Share Posted October 27, 2005 Erol - First - you should have an R200 already in the car. It will be an open unit - driving only one axle - but it will handle the HP of the RB. A better one would be an R200 out of an '87-89 turbo 300ZX. It is a 3.70:1 ratio that is usually a clutch type limited slip. There ws one special 'white' model made that had a viscous type limited slip that folks tend to stay away from. YOur third option would be to go through an R230 conversion. YOu can find them in the twin-turbo'd Z32's - 1990-1996. Now yu have more searching to do. Quote Link to comment Share on other sites More sharing options...
Guest erol Posted October 27, 2005 Share Posted October 27, 2005 The R200 from the 300zx turbo sounds right, but I dont believe we got these in the UK. Would a 180/200sx diff be the same? Does anyone know what diff the R33 GTS-t uses? Quote Link to comment Share on other sites More sharing options...
Phantom Posted October 27, 2005 Share Posted October 27, 2005 Absolutely not. The 180, 200 & 230 refers to the diameter of the ring gear. An R180 differential is smaller than an R200 and therefore will carry less HP & torque. In turn, the R230 will carry even more than the R200. YOu might do a search and see what other vehicles use an R230 or R200. They are not necessarily manufactured by Nissan and are used on other vehicles. Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted October 27, 2005 Share Posted October 27, 2005 Would a 180/200sx diff be the same? Erol is referring to car models. The 180SX was never imported here. Quote Link to comment Share on other sites More sharing options...
Guest erol Posted October 27, 2005 Share Posted October 27, 2005 Sorry Phantom, i should have been more clearer. The 180/200 sx is the model of the car. I'm reading and reading through search results and am very confused now. Some of the posts with pictures or links no longer show or work. Also working out what cars you are talking about with chassie codes is slowing me down a bit. Give me some time to catch up. I didnt realise the talent of people on this site. Some of the installs I have seen pictures of or fantastic. Great work guy's. Quote Link to comment Share on other sites More sharing options...
BlackBeaut Posted October 27, 2005 Share Posted October 27, 2005 Plenty of UK specific advise is available at the UK club http://www.zclub.net/ To add to this thread though, LSDs in UK long nose R200s don't happen with out cost. The most straight forward LSD to use is the Quaife ATB as it allows you to use the existing output shafts (29spline) so you can keep either the U/J half shafts or go with the 280ZX CV shaft conversion. You could try to get hold of a Power Brute (I think that's right) clutch based LSD from the US that should work with 29 spline output shafts - definitely search on that one though as I'm not 100% sure. After that things get trickier. You can take the viscous centre from a 200SX or Skyline or Z32 NA R200 diff and plonk that in a long nose R200 but you have to then use the 200SX output shafts which pretty much means you're in to custom CV shaft land. Similarly you can get hold of Nissans Torsen LSD centre from the S15 Silvia but that uses 30 spline output shafts, so once again you're stuck with them and the custom CV route. Finally you can just go the whole hog and try to fit either the short nose R200 from 180/200SX, Skyline, Z32 NA, or the beefier R230 from the Z32TT. That involves a lot of fabrication work though and you still need custom CV shafts and a new prop-shaft - hurray Cheers, Rob Quote Link to comment Share on other sites More sharing options...
Guest erol Posted October 27, 2005 Share Posted October 27, 2005 Hi Rob, thank you for your post. You say "the most straight forward LSD is the Quaife ATB" does this mean it fits into my existing housing or do I need to get a housing from another car that will bolt in place of my one? I'm sorry for the dumb questions. One thing to pass by you. I'm trying to purchase a gts-t as a doner car. What from the diff can I use, e.g. internals of the diff, shafts, mounts? Your help is appreciated, i just hope I'm able to help some of you one day. Cheers, Erol Quote Link to comment Share on other sites More sharing options...
BlackBeaut Posted October 27, 2005 Share Posted October 27, 2005 Hi Rob' date=' thank you for your post. You say "the most straight forward LSD is the Quaife ATB" does this mean it fits into my existing housing or do I need to get a housing from another car that will bolt in place of my one? [/quote'] Yep, it's just the diff centre you get, so that gets put into your existing diff replacing the open centre. I did forget to mention that it isn't too cheap though, sorry I did mean to. I think you're looking at around £600ish plus fitting if you don't DIY. Personally I'm going with a short nose R200 from a S13 200SX as it's got a 3.92:1 ratio. I've added in the torsen unit from the S15 Silvia as I know that I'm going with custom CV shafts anyway due to wanting to do silly things like try to mount Z32 hubs and brakes at the other end. That's all progressing at a staggeringly slow rate though One thing to pass by you. I'm trying to purchase a gts-t as a doner car. What from the diff can I use' date=' e.g. internals of the diff, shafts, mounts? [/quote'] You should be able to use it's centre, but if it's a viscous LSD then you'll have to use it's output shafts and so you'll then need custom CV shafts. You won't be able to use it's crown or pinion in a long nose R200 though which is a bit of a pain. Mounting of the short nose diffs is pretty different to the long nose. Some brave people have taken complete rear sub-frames from 200SX and maybe Z32s and transplanted them lock, stock. I believe the Skyline rear end is of a similar. Major work involved there of course, do a search for posts by a guy called Maichor for hints on that solution. Your help is appreciated' date=' i just hope I'm able to help some of you one day. [/quote'] Pleasure mate, always glad to help out where I can! Cheers, Rob Quote Link to comment Share on other sites More sharing options...
Phantom Posted October 27, 2005 Share Posted October 27, 2005 Dang - I think I'd be cruising Ebay for a long nose 3.70:1 R200 LSD. Everything else sounds like a huge PITA. Quote Link to comment Share on other sites More sharing options...
Guest erol Posted October 28, 2005 Share Posted October 28, 2005 Is this the sort of thing I should be looking for? http://cgi.ebay.com/ebaymotors/DATSUN-240Z-260Z-280Z-280ZX-300ZX-TT-R230-LSD-VLSD-V8_W0QQcmdZViewItemQQcategoryZ33731QQitemZ8010331855QQrdZ1QQsspagenameZWD2V Sorry if I'm not meant to leave ebay links on this site. Quote Link to comment Share on other sites More sharing options...
Phantom Posted October 28, 2005 Share Posted October 28, 2005 Depends - if you're not planning on running much more than 450 HP I'd stick with the 3.70:1 R200 LSD. It is a straight swap for the differential you have now. If you want to upgrade and don't mind the extra work this would be a good choice. Quote Link to comment Share on other sites More sharing options...
BlackBeaut Posted October 28, 2005 Share Posted October 28, 2005 Boy, I'd love to see the shipping costs on that baby to the UK Luckily 300ZXTT R230 are available in the UK, Like Phantom says it's not really worth the extra hassle if you're not push 450-500bhp, plus they weigh an bloody ton. R200s are heavy enough! Cheers, Rob Quote Link to comment Share on other sites More sharing options...
Phantom Posted October 28, 2005 Share Posted October 28, 2005 Boy' date=' I'd love to see the shipping costs on that baby to the UK Luckily 300ZXTT R230 are available in the UK, Like Phantom says it's not really worth the extra hassle if you're not push 450-500bhp, [u']plus they weigh an bloody ton.[/u] R200s are heavy enough! Cheers, Rob English understatement - I love it! Hey Rob - on another note - who do I have to poke over at zclub.net to verify my registration? I went thorough all the procedures and sent two emails to the webmaster and still can't post. Is he on holiday or something? Quote Link to comment Share on other sites More sharing options...
BlackBeaut Posted October 28, 2005 Share Posted October 28, 2005 Hey Rob - on another note - who do I have to poke over at zclub.net to verify my registration? I went thorough all the procedures and sent two emails to the webmaster and still can't post. Is he on holiday or something? Well that's no good!! I'd give Steve Burns a try. Failing that, Steve Kiddell or Rob Hughes should be able to push things along, all details are here: http://www.zclub.net/index.php?page=contacts Not seen Russ about for a while, he's either snowed under at his new job or slacking off on holidays post graduation, blummin students!! Cheers, Rob Quote Link to comment Share on other sites More sharing options...
Guest erol Posted October 28, 2005 Share Posted October 28, 2005 Depends - if you're not planning on running much more than 450 HP I'd stick with the 3.70:1 R200 LSD. It is a straight swap for the differential you have now. If you want to upgrade and don't mind the extra work this would be a good choice. With regards to power, I'd be looking for about the 350 mark, I need the car to be as responsive as possible. I would like to use it for track days and realy controling it around the bends. You say to go for the 3.70:1 r200 LSd, as its a straight swap. Can you tell me which car I can find this on? I'll check the sticky at top of thread too. If I go for one of these diffs, would I need to get one of those lovely looking billet mustache's? I read a thread of someone on this making a few for the last time, but I'm unable to find it again. Can anyone give me a name please. Cheers, Erol Quote Link to comment Share on other sites More sharing options...
Phantom Posted October 28, 2005 Share Posted October 28, 2005 Rob, Thanks for the lead. Erol, The 3.70:1 R200 LSD was original equipment on the 1987-1989 300ZX turbo. You may have to get a modified mustache bar if you want to keep the finned cover that comes with the diffy. If you can't find the custom mustache you could at least temporarily use a standard cover - especially since temperatures there are generally a little lower than here. Depending on you're luck I've seen them range from $450 to $700 US - plus shipping & handling. Quote Link to comment Share on other sites More sharing options...
Guest zfan Posted October 28, 2005 Share Posted October 28, 2005 I have used the 300ZX Turbo rear end out of a 1987 model for close to 3 years now and have yet to break it. I will admit to breaking half shaft u-joints until I did Ross's CV swap..YEAH! I have a 385 sbc in my 240Z that is around 400 hp/400 tq to the rear wheels, so they do hold up. Oh and I drag race my Z frequently! Mike Quote Link to comment Share on other sites More sharing options...
Phantom Posted October 28, 2005 Share Posted October 28, 2005 That's what I've heard Mike - and then sometimes you take it to the track too! Quote Link to comment Share on other sites More sharing options...
JMortensen Posted October 28, 2005 Share Posted October 28, 2005 You may have to get a modified mustache bar if you want to keep the finned cover that comes with the diffy. If you can't find the custom mustache you could at least temporarily use a standard cover - especially since temperatures there are generally a little lower than here.Depending on you're luck I've seen them range from $450 to $700 US - plus shipping & handling. It's not the mustache bar that needs modifying. It is the transverse link directly below the mustache bar. If you don't want to hassle with it just use the standard cover. I autoxed and did track days with the standard cover for 8 or so years with no issues. You may want to try this member here: Leith280zlt1. He's been building complete LSD diffs. He gets an R200 from the junkyard, pulls the open carrier then installs the Power Brute (same as Nissan) clutch LSD and ships it out. Seen posts from several happy customers, one today even. Quote Link to comment Share on other sites More sharing options...
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