RB26powered74zcar Posted August 24, 2005 Share Posted August 24, 2005 I am not sure what type of gearbox the 240sx KA or SR are but here is link that shows the FS5W71C mated to the L Series bellhousing (in this case the box is from a R32 Skyline should be strong enough)pitroad modified gearbox I like that set up for the L6 motor, but I'm not sure about the "R32" trans they use. Is it a RB20det trans, or the RB25det trans?? If its the RB20, then I don't think its that great of a upgrade. Quote Link to comment Share on other sites More sharing options...
1 fast z Posted August 25, 2005 Share Posted August 25, 2005 Have you guys picked up a Z32 tranny? MAN, I would NEVER put one of these in my car! Driving the bigger gears, takes ALOT of HORSE. PLUS, the added mass. I have seen HIGH HP L series cars, with KA trannys, and not having any problem, and I have also seen 400+ SR's and KA's with stock trannys. Quote Link to comment Share on other sites More sharing options...
slownrusty Posted August 25, 2005 Share Posted August 25, 2005 Cody - Are you talking about the grinding in your T5? Quote Link to comment Share on other sites More sharing options...
Garrett76Zt Posted August 25, 2005 Author Share Posted August 25, 2005 Have you guys picked up a Z32 tranny? MAN, I would NEVER put one of these in my car! Driving the bigger gears, takes ALOT of HORSE. PLUS, the added mass. I have seen HIGH HP L series cars, with KA trannys, and not having any problem, and I have also seen 400+ SR's and KA's with stock trannys. No doubt this is a heavier tranny. This is the same tranny that is used in the RB25 turbos. it is a much bigger tranny. Who do you know that has made big HP with a KA tranny in a z? I'd be interested to see some actual numbers. Yes there are several guys making 400hp on KA's. only problem is they are making far less torque at 400hp than an L setup is going to at 400hp. Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted August 25, 2005 Share Posted August 25, 2005 Have you guys picked up a Z32 tranny? MAN, I would NEVER put one of these in my car! Driving the bigger gears, takes ALOT of HORSE. PLUS, the added mass. I have seen HIGH HP L series cars, with KA trannys, and not having any problem, and I have also seen 400+ SR's and KA's with stock trannys. I guess you haven't made significant rwhp w/ an L28 yet...otherwise, it would make perfect sense to go to a beefier tranny. Changing trannies every few months gets old fast, not to mention worrying whether or not it will blow up on you at the track. I have made nearly 400 hp through the stock L28 tranny too (calculated from my 1/4 mile mph)... and there are guys making 400+ hp w/ stock KA trannies, but ask those guys how often they have to change them out. Also, torque is a bigger factor than horsepower and the L28 will make more torque than an SR at the same rwhp levels. The idea is to get a stout transmission that you can rely on. If you are worried about robbing the car of horsepower, you can turn up the boost another 1-2 psi, not having to worry about the tranny so much, and ... problem solved BTW, I dropped off the L28 tranny bell housing to Mark today. He'll get started on it when he has the chance. I plan on bringing the adaptor w/ me to SEZ, if the L28 adaptor is not finished, then Mark said he would lend the SR adaptor attached to the Z32 tranny to me so anyone coming can get an idea of what it will look like. The wheels of progress have begun turning!! mike Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted August 25, 2005 Share Posted August 25, 2005 Nice job ZGad, I wish I'd have had that option while I was with my last 3Lturbo set up. I went thru many 5 spd Z trannys... Quote Link to comment Share on other sites More sharing options...
rags Posted August 26, 2005 Share Posted August 26, 2005 Since no one has really tried a Z32 or 350Z trans behind a turbo L6 all of the negativity is speculation. Since I have a 6speed in the shed and I think I'm pushing some good power (3 liter, 8.5-1, t3t04e 57 trim, 50 lb injectors and 18lbs of boost), I'd be willing to try it. Mike, is there anyway I could get in on the adapter build? Joe Quote Link to comment Share on other sites More sharing options...
Cody 82 ZXT Posted August 26, 2005 Share Posted August 26, 2005 Cody - Are you talking about the grinding in your T5? Yep, No doubt some of the fault of the tranny is due to me and the abuse I put it through a couple of times. Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted August 26, 2005 Share Posted August 26, 2005 Sure Joe. I will continue to update this thread as new info comes available. The adaptor should not be much different for the 6 speed than it is for the Z32 tranny... aside from the bolt pattern... then the next obstacle will be the input shaft. I may have to have a custom pilot bushing machined. The clutch should be a no brainer as the center splined section of the Z32 clutch should be able to be used w/ the outer section of the turbo 240mm clutch disk, making a "hybrid" clutch disk and then the turbo 240mm flywheel and pressure plate can be used with the new disk. Hopefully the t/o bearing from the Z32 will be compatible. I guess there is a little way to go, but we're headed in the right direction... I hope!! Quote Link to comment Share on other sites More sharing options...
kj280z Posted September 3, 2005 Share Posted September 3, 2005 Mike, Hey... I just left ya a voice message. I have a Z32 tranny ready to go... I am VERY interested... Give me a call! Ken Quote Link to comment Share on other sites More sharing options...
tfreer85 Posted September 28, 2005 Share Posted September 28, 2005 Are there any updates on this? Seems pretty interesting just curious if any progress has been made. Tyson Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted September 28, 2005 Share Posted September 28, 2005 My fabricator is swamped with a government project (gotta pay the bills you know) and one of his guys chose to seek employment elsewhere, so there are still no updates to speak of, other than it will be done. I just picked up my Z32 tranny and he showed me 3 others sitting in the shop waiting to be adapted. On a side note, the adaptor kit he made to mount the Z32 tranny to the SR motor is beating the streets of Orlando. The Z32 tranny has been installed a month now and there is nothing but good news so far regarding it. Quote Link to comment Share on other sites More sharing options...
tfreer85 Posted September 29, 2005 Share Posted September 29, 2005 Well thats good that the Z32 SR is doing well, and bad about the delays. Any idea on what the kit is going to cost and wether it will work with the Z33 6 Speed as well? Thanks, Tyson Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted September 29, 2005 Share Posted September 29, 2005 No idea on cost yet. He said that he can do a 6-speed as well, but he needs the tranny to do it. The tranny bellhousing is actually cut back the width of the adaptor and the adaptor is bolted to the bellhousing, and then the whole assembly is bolted to the block. Does the Z33 tranny use the same size/spline output shaft? Fortunately, the Z32 shaft has the same splines as the L28 tranny, so if you have a good clutch, it can remain the same. Quote Link to comment Share on other sites More sharing options...
tfreer85 Posted September 29, 2005 Share Posted September 29, 2005 Does the Z33 tranny use the same size/spline output shaft? Fortunately, the Z32 shaft has the same splines as the L28 tranny, so if you have a good clutch, it can remain the same. This I do not know I'll do some research to find out, what the interchangeability is and let everyone know whats up. Tyson Quote Link to comment Share on other sites More sharing options...
AK-Z Posted September 29, 2005 Share Posted September 29, 2005 INteresting discussion. I would like to know if anyone has done a sr/ka tranny swap to a RB engine. Just curious. I would think it would rev faster and the added benifet to the loss in weight sounds good, but I assume you would have to be easy on aceeleration due to the torque numbers being higher on a RB engine to the SR/KA engine. Quote Link to comment Share on other sites More sharing options...
briann510 Posted September 29, 2005 Share Posted September 29, 2005 not to hijack this thread, but you guys know of anyone in the san francisco bay area that rebuilds 280z 5 speed tranmissions and is competant in knowing what they are doing? Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted November 12, 2005 Share Posted November 12, 2005 Just a quick update... Mark has finally completed the big govt job he was doing. The drawings for the tranny adaptor are finished and he has requested that I bring him a bare block, starter, and engine mounts (which I will do Monday). He will be making the adaptor, tranny mount, and shifter plate all mocked up in a 73 240z. This should be (for all intensive purposes) a direct bolt in for all 72-78 Z's once you provide him with your Z32 bell housing to modify. The driveshaft will be something that you will have to do at your local driveline shop. More updates to come in a few weeks... PAX, mike Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted November 12, 2005 Share Posted November 12, 2005 thanks for the update! keep up the good work! we are all getting anxious Quote Link to comment Share on other sites More sharing options...
kj280z Posted November 13, 2005 Share Posted November 13, 2005 When I return fron NJ next week I'll get my BH over to him... Thanks for the update Mike Quote Link to comment Share on other sites More sharing options...
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