Jump to content
SAU Community

Recommended Posts

Hi drift_me_silly, you asked "q....if r33 auto diff fitted to r32 with r 25 box....would fifth at 100k's drop down to around 2ooorpm?..."

As far as I know the Auto R33 diff and the Manual R32 diff are the same ratio (4.363 to 1). So I don't understand the question...

The Series 1 R33 clutch (push type) is the same as the R32 clutch. The Series 11 R33 and R34 is different (pull type). We have used the same OS Giken twin plate in an R32 GTR, R32 GTST and S1 R33 GTST. Fits straight in. Hope that answered your question.

The Trust 6 speed has a close ratio set of gears whereas the R34 GTT has a wider ratio set. So not comparing apples with apples. Any car with any engine would be faster accelerating with the close ratio gearset than the wider ratio.

Hope that helps

  • Replies 44
  • Created
  • Last Reply

Top Posters In This Topic

My R32 GTSt has a flywheel and clutch meant for an R32 GTR, so whatever the differences, they don't stop you fitting/switching.

... and as for fitting an Rb25 behind an RB20, im not having any trouble with my box at them moment. (im guessing i have between 135-150rwkws) At what sort of rear wheel power figures do they start having troubles. And what troubles surface first?

Hi guys, the starter motor bolts up in the same spot, so the flywheels must be the same diameter. The bolt pattern on the crankshafts are the same. All the gearboxes have the same size and splined input shaft. So if you consider the package (flywheel, pressure and clutch plate), then all Skylines with the push type actuation are interchangeable.

RB20 flywheels are a bit lighter than RB25's and the clutch friction surface is smaller in diameter. So I don't think you could use an RB20 flywheel with an RB25 pressure and clutch plate, not without machining anyway.

Change the lot all together though and there are no problems.

Hope that clarifies further

I was looking at bot gearboxes today and i removed the speed sensor from the rb25 box and it was very long, about 4inces, then looking at the rb20 box the sensor is more towards the back of the box and i could not be any longer than about 2inches, i couldnt take it out as i would then have to replace the oil but i just wanted to know if there was any special trick to swaping them over as the rb25 one is long with a red gear on the end and it appears to be all in one piece.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Have a look at that (shitty) pic I posted. You can see AN -4 braided line coming to a -4 to 1/8 BSPT adapter, into a 1/8 BSPT T piece. The Haltech pressure sender is screwed into the long arm of the sender and factory sender (pre your pic) into the T side. You can also see the cable tie holding the whole contraption in place. Is it better than mounting the sender direct to your engine fitting......yes because it removes that vibration as the engine revs out 50 times every lap and that factory sender is pretty big. Is it necessary for you......well I've got no idea, I just don't like something important failing twice so over-engineer it to the moon!
    • Yup. You can get creative and make a sort of "bracket" with cable ties. Put 2 around the sender with a third passing underneath them strapped down against the sender. Then that third one is able to be passed through some hole at right angles to the orientation of the sender. Or some variation on the theme. Yes.... ummm, with caveats? I mean, the sender is BSP and you would likely have AN stuff on the hose, so yes, there would be the adapter you mention. But the block end will either be 1/8 NPT if that thread is still OK in there, or you can drill and tap it out to 1/4 BSP or NPT and use appropriate adapter there. As it stands, your mention of 1/8 BSPT male seems... wrong for the 1/8 NPT female it has to go into. The hose will be better, because even with the bush, the mass of the sender will be "hanging" off a hard threaded connection and will add some stress/strain to that. It might fail in the future. The hose eliminates almost all such risk - but adds in several more threaded connections to leak from! It really should be tapered, but it looks very long in that photo with no taper visible. If you have it in hand you should be able to see if it tapered or not. There technically is no possibility of a mechanical seal with a parallel male in a parallel female, so it is hard to believe that it is parallel male, but weirder things have happened. Maybe it's meant to seat on some surface when screwed in on the original installation? Anyway, at that thread size, parallel in parallel, with tape and goop, will seal just fine.
    • How do you propose I cable tie this: To something securely? Is it really just a case of finding a couple of holes and ziptying it there so it never goes flying or starts dangling around, more or less? Then run a 1/8 BSP Female to [hose adapter of choice?/AN?] and then the opposing fitting at the bush-into-oil-block end? being the hose-into-realistically likely a 1/8 BSPT male) Is this going to provide any real benefit over using a stainless/steel 1/4 to 1/8 BSPT reducing bush? I am making the assumption the OEM sender is BSPT not BSPP/BSP
    • I fashioned a ramp out of a couple of pieces of 140x35 lumber, to get the bumper up slightly, and then one of these is what I use
    • I wouldn't worry about dissimilar metal corrosion, should you just buy/make a steel replacement. There will be thread tape and sealant compound between the metals. The few little spots where they touch each other will be deep inside the joint, unable to get wet. And the alloy block is much much larger than a small steel fitting, so there is plenty of "sacrificial" capacity there. Any bush you put in there will be dissimilar anyway. Either steel or brass. Maybe stainless. All of them are different to the other parts in the chain. But what I said above still applies.
×
×
  • Create New...