Guest Anonymous Posted April 5, 2001 Share Posted April 5, 2001 I have seen the video of the supercharged v8Z blazing his tires at a running start and am wondering what type of suspension he is running? I am not totally convinced the r200 will handle 400-500 hp. I would still like to use an IRS the only other idea would be a vette(have heard of it done by Georgia Z club) but how practical is that? I would also like something numerically lower than the 3.55 gears am I dreaming or could this be done? Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted April 5, 2001 Share Posted April 5, 2001 Zman, I believe the Z you are referring to is running IRS with an R-200. It seems the success with the IRS and a high-torque application varies from breaking parts like they were twigs to "how in the hell does he get away with that". Derek Grubb is running a 71 with a Buick turbo and his car has run a best of 10.59 with a 1.49 60' on 6" slicks. He is using an LSD with 3.36s (custom), but the rest is stock Nissan IRS including halfshafts. I have heard, however, that he has broken axles. I am running the same drivetrain with less HP but I still launch hard with a transbrake and 275 BFG DRs and have a best 60' of 1.55. My car is also a 71 with Illuminas all around at the softest setting when racing, generic sport springs in the front, JTR rear spring perch mod, welded 3.54 diff, ZXT CVs with an adaptor and both swaybars removed. Another key to keeping my setup together is my homemade diff strap that keeps the nose of the diff planted like a solid mount but still retaining the stock rubber mount. I think some of the keys to keeping the stock IRS together are: proper driveshaft angle, avoiding extreme halfshaft angles (cured by using CVs), keeping the nose of the diff planted, avoiding massive wheelspin and wheelhop, and of course, being lucky to find quality used parts. Remember the used diffs, stub axles and halfshafts we get from the boneyards are upwards of 25yrs old and that used R-200 might still have the original lube from the factory Cannot say that what I am doing will work for everyone, but so far I am having good results and will continue to have faith in the IRS setup. ------------------ Scottie 71 240GN-Z Scottie's GNZ Quote Link to comment Share on other sites More sharing options...
Owen Posted April 6, 2001 Share Posted April 6, 2001 What about older Jag diffs? A turbo book I had mentioned these things stand up to 600HP, don't know about the torque though. Owen ------------------ http://www.homestead.com/s30z/index.html Quote Link to comment Share on other sites More sharing options...
Mikelly Posted April 6, 2001 Share Posted April 6, 2001 OK my first question is this: Do you want to reinvent the wheel? Add more work to an "Already Hard project"? There are a number of guys here on this site that can attest to this: The week link in the R200 is BY FAR the u-joilt equipped half shaft units... Bottom line... If you are worried about anything, then get Scottie's buddy to make you a set of those Axle Shaft adapters and then get yourself a pair of 280ZX turbo CV Axle shafts, and weld your R200 Axle flanges tot he adapters, slap the CV axles in, and you are done... No fuss, no muss... My 500HP small bloock is throwing nearly 500Ft# of torque to the rear end and I'm doing just fine. Mike ------------------ http://hometown.aol.com/dat74z/myhomepage/auto.html "I will not be a spectator in the sport of life!" mjk Quote Link to comment Share on other sites More sharing options...
blueovalz Posted April 6, 2001 Share Posted April 6, 2001 I feel another key to this is the tire compound and size. When a 225 (for example) gets enough torque, it's going to be the weak link that breaks. Put a 12" wide, soft compound slick on the same car, and the resulting weak link may develope elsewhere. This is one reason I have not actively seached for a LSD. I get a nice pattern without it, but when one side (tire traction) breaks loose, I consider it a "popoff" valve for the drivetrain (note: this is for street use, as an LSD is most desireable for the road course). Terry Quote Link to comment Share on other sites More sharing options...
jeromio Posted April 6, 2001 Share Posted April 6, 2001 The car in the video you refer to is Darius supercharged LT1 (I think it may be stroked to 383 as well??). He has an R230 from a Z32TT. There are actually a couple of people that I have heard of who have done this swap. Mostly they do it by using only the inboard Z32 CV, and a (custom?) flange and UJoint outboard. There is a person on this forum who has been discussing the possibility of using the entire Z32 rear drivetrain by modifying things like the 240 carriers and the Z32 halfshafts. Certainly seems like switching to CVs and seeing how they hold up would be wise - no sense taking on a complex and $$ project if you don't need to. If you have a 240, the ZXt CV halfshafts are a simple, bolt in swap. They can be had for less than $150 at most yards. ------------------ 240Z.jeromio.com Quote Link to comment Share on other sites More sharing options...
Guest needwaymorespeed Posted April 7, 2001 Share Posted April 7, 2001 Im currently working on putting the complete rear end from a tt 300z in my car-just finished one of the jigs yesterday. my reasons for doing it are these 1- it will give me the rear disc brakes with twin spot calipers-these are nice aluminum and say nissan on the sides of them-looks real cool- rear rotors are big-11.5"from memory" and vented 2- a viscous rear end-far superior and the pricing for the rear ends from a 87-89 turdo z with a lsd is ridiculous 3-the stub axles stock 240 z and 280 stub axles are very small-theres been several guys with higher horsepower cars that have broken these 4-actual rearend is a r230=its big 230mm works out to be over 9 inche ring gear-its slightly bigger than a ford 9 inch-aand we all know how tuff they are 5-wanted cv joints this rear end has them 6-wanted 5 lug-rear end has it 7- want to run deep offst wheels " the 300 z tt wheels have a 6 and 1/16 offset and those sweet cobra r wheels that mike kelly has are a deep offset also-so when I make my new Knuckle Im going to add 1 inch of width to it so that I wont have to buy spacers for the rear of the car-wider track width is a plus also. whats the actual cost to do this the rear end with 2 shafts rear rotors calipers and knuckels cost me 650.00-from a salvage yard- will have to spend a 100.00 to cut and respline the cv shafts-are cars are much narrower than the 300 z tt plus a 100.00 for metal-going chrome moly -lightweight and strong I also have to buy or make a new rear brace to clear the fiined cover-they cost 80.00 total cost 1000.00 give or take a 100.00 plus the driveline plus lots and lots of time to do it but hey we love these cars right!!???!! not cheap but I dont want to break a rear halfshaft -u-joint or loose a stub axle. cost to do it the other way 11.5 rear dis brakes 500.00-can go smaller for less money r200 rear end thats lsd 300-8000 cv shafts-150.00 cv shaft adapter -if you can get it from scottie-sounded like it was a lot of work for scottie to get these for everyone- was a little over a 100.00 have to have a rear brace to clear finned r200 cover also 80.00 grand total 1130.00 for the r200 set up "thats if you can find a lsd for 300"versus 1000.00 for the r230 set up which is definately better in every way except the hassle of doing it. anyways thats my take on it I wanted a Irs with the durrability of a solid axle-hopefully ill get it. there's a thread on this in drivetrain section under complete r230 rear in 240. Curtis whew that was way too much typing... Quote Link to comment Share on other sites More sharing options...
pparaska Posted April 7, 2001 Share Posted April 7, 2001 Curtis, that's an awesome plan. Are you going to offer the custom hub carrier you're making? Where are you getting the axles resplined? What ratio in the diff? What ratios are available in the yards? Thanks in advance ------------------ Pete Paraska - 73 540Z - Marathon Z Project pparaska@home.com Pete's V8 Datsun 240Z Pages Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 7, 2001 Share Posted April 7, 2001 Thank you for your reply's guys a lot of good advice one question and pardon my ignorance what is a R230 and Z32TT? Quote Link to comment Share on other sites More sharing options...
Guest needwaymorespeed Posted April 8, 2001 Share Posted April 8, 2001 Thanks Youre welcome for the info. Pete Ive ben thinking about marketing them ,just wasnt sure what type of interest there would be for them. I am looking at moser engineering or a local shop on having the axles shortened and resplined. I know of two ratios available for thee r230 rear ends 3.54 for infiniti Q45-not sure from what year to what year guessing 90-96 anybody know for sure 3.68 for 90-96 300 z tt the na have the r200 rearend in them Curtis Quote Link to comment Share on other sites More sharing options...
Drax240z Posted April 8, 2001 Share Posted April 8, 2001 R180 - Nissan diff. with 180mm ring gear R200 - Nissan diff. with 200mm ring gear R230 - Nissan diff. with 230mm ring gear R180s were commonly in the 240z, 510 (I think) and a bunch of 4x4's. R200s are much beefier, and were in the 280z, 280zx, 300zx (84-89, often called Z31's), and naturally aspirated 300zx (90-96, often called Z32's) R230s are from the 300zx twin turbo's (Z32s, 90-96), as well as the infinity Q45 I believe. Probably lots of other cars too, the 240sx, 200sx, etc probably had some variation on these. Basically all RWD nissan diffs fit in here somewhere. ------------------ Richard Lewis - 1972 240z, Powered by a Nissan 2.8L Turbo Inline 6. Drax240's Turbo Site Beginners Turbo FAQ & Answers Quote Link to comment Share on other sites More sharing options...
pparaska Posted April 8, 2001 Share Posted April 8, 2001 Curtis, thanks for those answers. Glad to hear that the 3.545:1 is available. Does the R230 from the Infiniti mount the same as the one in the TT Z32? Quote Link to comment Share on other sites More sharing options...
Guest needwaymorespeed Posted April 9, 2001 Share Posted April 9, 2001 Does the R230 from the Infiniti mount the same as the one in the TT Z32? yes there the same. I acually have the r230 and half shafts and knuckels form the infiniti and rotors and calipers from the tt. only difference I could find between two cars is infiniti has non vented rotors with single spot calipers and the 3.54 ratio tt has vented rotors twinspot calipers and lower 3.68 ratio. the knuckles are even the same. Curtis Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted December 4, 2002 Share Posted December 4, 2002 Does anyone know if a Infinti Q45 rear diff will bolt into a 240z???? Quote Link to comment Share on other sites More sharing options...
Tim240z Posted December 4, 2002 Share Posted December 4, 2002 No the R230 will not bolt in. You will have to: Make a front diff mount. Get a R200 mustache bar and redrill (machine shop!!) Get 2 sets of side shafts to make one set (need 4 inner CVs, to use inboard and outboard) Have new side shafts made (shorter) Have a new driveshaft made. Unless you are using monster torque and HP, use the R200, that is bolt in. Tim Quote Link to comment Share on other sites More sharing options...
Guest needwaymorespeed Posted December 4, 2002 Share Posted December 4, 2002 Funny this thread should pop up again!! Last night I finished insdtalling my custom rear knuckles that are talked about in this post-they look great! youd think it camr from the factory this way! Ill take some pics,just dont have anywhere to host them. now I Have to make my front member for the r230 and shorten the cvshafts Curtis Quote Link to comment Share on other sites More sharing options...
Guest JAMIE T Posted December 5, 2002 Share Posted December 5, 2002 I'd love to see the pics of your knuckles. I can't wait. Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted December 5, 2002 Share Posted December 5, 2002 i would love to see the pics also. How much power are you looking to put down? i mean i know 300ZX TT guys with n/a rearends that are putting down more the 500+hp and the rear end is fine. so is this R230 worth it if ur putting down say 450rwhp? the Z32 R200 is LSD too. Plus i would think its cheaper to buy. mike Quote Link to comment Share on other sites More sharing options...
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