JMortensen Posted December 15, 2010 Author Share Posted December 15, 2010 Keep starting in 2nd. No reason not to. You can put a taller diff in there, 3.54 is easy to find, but is shifting going to make you faster because you have more torque multiplication, or slower because you lose time shifting? I would guess that you'll be slower for shifting. So long as the highway rpms aren't annoying with the 3.90, I'd stick with it. If they are, then jump down to a 3.70 or a 3.54. You can use the trans calculator to figure it all out, not sure if all T5's have the same ratios, but it does have a T5 in there and you can manually enter the ratios if they're wrong: http://webspace.webring.com/people/cz/z_design_studio/ Link to comment Share on other sites More sharing options...
hpltree Posted December 17, 2010 Share Posted December 17, 2010 j m thanks for the reply..i do see the point of what will be quicker but i am almost looking for what will be a better driver friendly combo, the starting off in second works great but then there is third real quick and fourth, so my untrained brain thinks that a lower or taller ( 3.90 to a 3.54 ) or taller to shorter gear would help ?? the car is a rocket super fun but i dont see us hiting the freeway at 90 with any rpm leftover .. thanks again for the help you are the gear man.. Link to comment Share on other sites More sharing options...
Tanman280z Posted December 18, 2010 Share Posted December 18, 2010 I am all confused now on the LSD, VLSD, CLSD conversions. I have a 77' 280z with an R200 rear end, assuming it is a longnose becasue it was a manual car to start. I was planning on using a 87' 300zx turbo diff and cv joints and all the necessary parts to convert it to an LSD. My question is; is there a replacement gear setup from Cusco or Kaap (or anyone) that I can buy and drop it in my original R200 diff that is in the car now, so I do not have to competely swap rear ends to have an LSD? If anyone reading this is near Spokane, WA please send me a message with any information and maybe we can meet up to figure this out. Thanks. Link to comment Share on other sites More sharing options...
LoneStarS30Z Posted December 18, 2010 Share Posted December 18, 2010 From what I understand, aftermarket LSD's from S13 240sx's with an open diff will go into our long noses. If you do a little digging you should find some people commenting on it. Hopefully someone more experienced than myself can chime in, but this is the route I'd like to take instead waiting for CLSD to finally pop up or going the rebuilt OBX route. Link to comment Share on other sites More sharing options...
johnc Posted December 18, 2010 Share Posted December 18, 2010 I am all confused now on the LSD, VLSD, CLSD conversions. I have a 77' 280z with an R200 rear end, assuming it is a longnose becasue it was a manual car to start. I was planning on using a 87' 300zx turbo diff and cv joints and all the necessary parts to convert it to an LSD. My question is; is there a replacement gear setup from Cusco or Kaap (or anyone) that I can buy and drop it in my original R200 diff that is in the car now, so I do not have to competely swap rear ends to have an LSD? If anyone reading this is near Spokane, WA please send me a message with any information and maybe we can meet up to figure this out. Thanks. You should do some more reading and get the FSM for your car. Are you wanting to replace the gears or the differential or both? Link to comment Share on other sites More sharing options...
Pharaohabq Posted March 31, 2011 Share Posted March 31, 2011 Okay, Thanks for ID'ing the 350Z Diff's as Shortnose R200's. Question then is, Can the CLSD from a 05 350Z be dropped into a 77-78 280Z Longnose diff? What of the diff stub axles? Are they swappable over as well, or would we have to use the S30 Axles? Link to comment Share on other sites More sharing options...
AkumaNoZeta Posted June 15, 2011 Share Posted June 15, 2011 I have a quick question. I like the 3.36 gear in my R180 but I have an early model and the LSD units I usually see for sale are for the 115mm ID gears. Is it possible for a machine shop to bore it out to fit? Link to comment Share on other sites More sharing options...
JMortensen Posted June 15, 2011 Author Share Posted June 15, 2011 I've seen a spacer on the ring gear (I think zcarnut posted a picture about 6 or 7 years ago), but haven't heard of someone cutting the ID of the ring. Link to comment Share on other sites More sharing options...
AkumaNoZeta Posted June 16, 2011 Share Posted June 16, 2011 Do you think it would be possible and keep it's durability and dependability? I don't think 5mm would be that much, it's only 2.5mm off each side, I just don't know about how hard that steel would be so I don't know how hard machining it would be. Link to comment Share on other sites More sharing options...
BenJammin Posted August 9, 2011 Share Posted August 9, 2011 (edited) Word of warning to anyone going for the Modern Motorsport adapters. MM is near impossible to get in contact with. Edited August 10, 2011 by BenJammin Link to comment Share on other sites More sharing options...
NewZed Posted August 9, 2011 Share Posted August 9, 2011 (edited) Not for this thread... Edited August 9, 2011 by NewZed Link to comment Share on other sites More sharing options...
Fhu Posted December 15, 2011 Share Posted December 15, 2011 Hello, Good thread, thank you I have a r200 longnose open 4 pinions Z31 (87), I want to convert by a LSD KAAZ san2655 1,5way If I understood, I must check if on my r200, there is 12mm bolt holes, If it's ok, I have just to put the LSD KAAZ in the r200 longnose pumpkin? That all? No problem with CV shaft? I have a S12 and the r200 Z31 clsd is bolt on without mods, and in France, the r200 ratio is 3.7 Link to comment Share on other sites More sharing options...
JMortensen Posted December 15, 2011 Author Share Posted December 15, 2011 Your 87 diff should have 12mm holes, so no problem there. Be sure the KAAZ takes a 29 spline CV shaft. If it does, I I think you're good to go. Link to comment Share on other sites More sharing options...
johnc Posted March 24, 2012 Share Posted March 24, 2012 R180 ring gears went to 11mm bolts from June 1986 on. Link to comment Share on other sites More sharing options...
LowCarbZ Posted April 7, 2012 Share Posted April 7, 2012 I have a question about my R200. (Rather than start a new thread I figure it could be discussed here as relevant). I have replaced all my bushings with poly for the mustache bar etc. put in an RT diff mount and removed any "clunks" from the rear end. Brand new Spicer U-joints, everything appeared fine with the diff when I had it out of the car a year and a half ago. I barely drove the car at all last summer. There is now this odd "whirring" sound coming from what sounds like the rear of the car. I can only describe it as a whirring that chatters slightly which is more pronounced at around 25-30mph or less. If the car is under load the sound pretty much goes away but when I coast off the gas it makes this "whirr-whirr-whirr" sound (the dashes are a break in the sound of silence). I'm not sure if maybe i'm mistaken and it's a noisy clutch in need of replacing but it certainly sounds like it's coming from the rear. There is a slight I will call it "howl" at highway speeds that isn't obnoxiously loud but it's still there. Any input before I go hauling everything back out again? Link to comment Share on other sites More sharing options...
RebekahsZ Posted April 8, 2012 Share Posted April 8, 2012 Poly bushings transmit more noise. If you want to get really noisy, go to solid metal mounts. For any helicopter pilots out there, do you remember how loud a tail rotor gearbox is during coast down? Well, a tail rotor gearbox is essentially the same as a differential. The gears are just noisy - run it till it breaks. Link to comment Share on other sites More sharing options...
LowCarbZ Posted April 8, 2012 Share Posted April 8, 2012 Poly bushings transmit more noise. If you want to get really noisy, go to solid metal mounts. For any helicopter pilots out there, do you remember how loud a tail rotor gearbox is during coast down? Well, a tail rotor gearbox is essentially the same as a differential. The gears are just noisy - run it till it breaks. I was also wondering that. So the added noise is likely just transmitted through the RT mount and te poly mounted mustache bar? Your line of thinking "run it til it breaks" is likely solid advice that I usually live by. I guess I just try to be pro active with the old girl. Link to comment Share on other sites More sharing options...
vega Posted April 9, 2012 Share Posted April 9, 2012 I am finding NO information anywhere that is solid information at what tq each of these parts tend to break at aside the diff themselves.... we need more info on that. I posted here to try to find that. http://forums.hybridz.org/index.php/topic/106147-drag-racers-using-long-nose-200/ Link to comment Share on other sites More sharing options...
Turbo6.0 Posted October 11, 2012 Share Posted October 11, 2012 (edited) So I just picked up my R230 out of a Z32 300ZX TT but I still need to get axles. My questions is what year Q45 axles should I be looking for? Are there any other cars that have the CV joints that would work? Edited October 11, 2012 by Turbo6.0 Link to comment Share on other sites More sharing options...
EF Ian Posted November 6, 2012 Share Posted November 6, 2012 Sorry if this is a stupid question, but instead of using spacers for the 10mm to 12mm ring gear problem can't you just get it redrilled so you can use 12mm ring gear bolts? Link to comment Share on other sites More sharing options...
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