Booztd 3

Guys I'm trying to get a centralized place going for the Z32 community who are 'taking the different road' I know many dont agree with the RB swapped Z's but for some of us and our goals, it makes sense. Because of this, I have conceived http://www.rbz32.com It is currently a phpbb forum, dedicated to the Z32 and RB swap. It will also have VG technical discussion, since I feel I cant completely abandon my roots! Anyways, I welcome any HybridZ members to the new community. Thanks Andy

Same info I have...these guys live about 2 hours from me and I know both of them personally

I dont believe dog-boxes use synchros?

Good god man, 8200 bucks? F that

Aye, my RB trans cost me 925 shipped, however i score Z trannies for like 200 bucks typically.....probably why i have 3 of them in my garage now, lol

Fast Cheap Reliable Pick 2.....

Any idea what he is wanting for a set of those gears?

I will be upfront with you on this, I have no idea right now. Initial inclination would tell me that the splined shaft is the longer counterpart, considering the internals of the RB and Z32 trans are identical. PS - How the hell does one get an 'extra' RB25 trans, I searched for weeks and ended up shelling about 800 for one, and all I needed was the bell housing and input shaft! LOL

From the research I have done, the NA clutch is the same size as the RB, but it just doesnt make much sense to me why nissan would put a 'smaller' clutch in a more demanding application (i'd consider an AWD platform to be more stressed than a RWD - making the same power) I'm going to do what I can to get the TT clutch to work, cuz I'd really like to run a Carbon-Carbon, but at the same time, I may just end up switching out to a TH400 or something automatic since I do alot of drag racing. Guys have been running NA transmission with TT clutch/flywheel combos for years. All you need to do is take a grinder and start shaving off material on the inside of the bell housing, thus increasing the inside diameter to fit the larger diameter flywheel/clutch. 5mm on each side will do it.....pretty simple to me, I may try it with the RB25 bell housing

Joel is not correct on the input/output shaft. The main input shaft is a few inches longer on the RB transmission, so you need to swap that as well as the bell housing out. You'll also need to source a slave cylinder for the rb trans. I am not 100% on the clutch that you'd use, but I know that an NA clutch will work, however I dont see why you wouldnt just clearance the RB bell housing to fit a 300ZX clutch, considering theres ~1cm difference in the diameter of the flywheel/clutch assembly. To answer your question, the TT and NA Z32 trans are different, but ONLY in bell housing diameter. Either way, youll be using the RB bell housing, so you might as well just save some coin and buy the NA tranny. I have both sitting in my garage right now (NA and TT tranny's ) if you'd like some pics

So my suspicions are confirmed

Have any idea what your car weighs? Here's a timeslip of mine with a similar 1/8th mile time

Drag racing has nothing to do with speed, its all about the fastest time (ET) The races you have seen were probably actual timed races where you're reaction time is factored in with your ET. Say for example your reaction time is .4 of a second and you run a 12.00 1/4 mile. Your opponent has a reaction time of .2 of a second and he runs a 12.00. Your total time is 12.40 and his total time is 12.20, thus he wins. The reason you see higher speeds, but yet the person could have lost is due to a few reasons, but is mainly traciton. Its hard to explain the phyics of this, and alot of people dont comprehend, but the less traction you have, the faster you will go, due to the more time you ahve to build up speed. I'll try to setup an example Say you run a 12.0@120mph and then you run an 11.5@120mph. The second run, you got way better traction. It took you 12 seconds to accelerate to 120, wheras the 2nd run it only took you 11.5 seconds to accellerate to 120. If you had that extra 1/2 second, think of the extra speed you would have gained....

Sorry to burst your bubble, but I'll school you any day on drag racing.... Reaction times have absolutly nothing to do with your ET or Trap speed. My out of the box times on average are 1.5-1.6, and to my knowledge, there arent any Z's that average quicker. I have seen some 1.4's before, however its a very rare case. In any event, shaving off one tenth of a second on your 60 foot time, only shaves off one tenth of a second off of your 1/8th mile time. It would consequently shave two tenths of a second off your 1/4 mile time

BTW - Nash You said 7.13@86mph, I have to question that, are you sure it wasnt 8.13, because I have timeslips for my 7.1~7.2 1/8th mile timeslips when I was making 540~rwhp on my VG setup, and I was trapping right at 99~100mph

Nash is correct on the tranny swap. I'll ad that all the internal gears, gear ratios, spring inserts, and synchros are interchangeable from the RB25 RWD trans to the Z32 trans Its basically taking the input shaft, and bell housing from the RB tranny, and mating those with the 300ZX transmission. This allows you to use the stock mounts, electronics, driveshaft, and even the electrical connections from the Z32. In fact, the entire alternator/oil sending unit harness is a plug-n-play operation going from the VG30 to the RB26 I am personaly going through all of this right now, and I'll be takign alot of pictures as I do it. My plans for tearing the trans down is to combine all the good synchros/spring inserts from both trannies.

Here is the picture re-hosted

You guys need to understand that is is NOT the sunchros that fail. I have dissected several of these transmissions, and it is actually the insert springs. These are the pieces that actually apply pressure to the synchro which then speeds it up to the speed of the gear. These insert springs fail and that removes the process of speeding up the synchro. Here is a picture of what the assembly looks like

If you free rev the motor in neutral, does it bumble the same way as it does under load?

What does the motor do when you free rev it to 4k? These motors run pretty smooth even on 5 cylinders, so you may want to monitor what the motor is physically doing at idle. I'd suggest just putting the coil pack harness wires 1 coil pack at a time.

I like the idea of a single turbo on a VG, its been done pretty successfully in chassis other than a Z32...... Here's an example of a 240sx i once raced against in indianapolis....

I'd like to see you do a single turbo setup on a VG motor in a Z32 chassis......few people have tried, fewer have succeeded....bad idea IMO There is just no room for a good sized single turbo on a vg30, not to mention theres a huge amount of plumbing due to being dual throttle body, etc

email me at andy@booztd3.com

Since you are going through the swap currently, is there any way you can get me some pics of what you've done? Thanks

Taylor Thanks for the info.....but I personally know charlie. I have sat in his car and actually revved it before I do however have a copy of that email, it still leaves a ton of details out however.