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Full RB26 swap with the drivetrain, not AWD!


Guest Anonymous

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Guest Anonymous

alright, guys, what do you think about that?

240Z with an RB26DETT plus the drivetrain, all coming from an R34, not 33 or 32. the difference is 6 gears! 8)

have a look at the pics.

gtr_fsus.jpg

gtr_rsus.jpg

http://www.nissan.co.jp/GT-R/R34/0105/DATA/SPEC/f_right.html

f**k, couldnt get a proper pic for the lay out, but if you click the link, you should be able to see.

the pic shows very well the transfer case. i reckon if you take out all the AWD bits, than you could stuff the whole drive train into Z. given that the skyline's wheelbase is 2665 mm and 240Z's is 2303, youd have to chop around 30cm out of the drive shaft. shouldnt be too difficult! or am i wrong?

now, couple of question. the original front-end on the Z has the struts at an angle and the GT-R strait. would that be a problem? or with a bit of welding it would fit? and then the crossmember (or whatever you call it) is absolutly different shape. would that fit?

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What do you mean, not AWD? I don't think it's as simple as removing the bits, is it? You need to do something with the transfer case (it does have one of those? forgive my ignorance of the drivetrain) -- the AWD eclipse needs internal mods to disable and freeze the front shaft. And regardless, doesn't the oil pan need to be modified to clear the crossmember, even if you are setting back the engine into a RWD configuration?

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The extra gear is of little consequence. And what little that is gained from the R-34 engine,(about 10-15 hp over the R-33,(and exhaust cam and slightly different turbos)), can more than be made up with boost or other "improvements".

Bottom line, there is no legitimate reason to use the 6 speed and the only reason to use the R-34 engine is because you have money burning a hole in your pocket for about 50% more than an R-33 depending on condtion.

As for putting in the AWD, that has been discussed fairly well. Something to consider that you might have missed. With Brad D's, Stony's, Mine and others, the motor sits well back in the engine bay, with the strut towers aligning about the 2 cylinder mark. If you line up the front diff output shafts,(where the center of the wheels would need to be to make it work), with the strut towers, it is now lined up on cylinders 3-4.

When you factor in a thick radiator, fans,(electric or mechanical), and the engine pulley's, the clearance is fairly small in our setup. Now move the engine about 6-8 inches forward. The radiator now needs to be in front of the radiator support and the intercooler in front of that!

It has been done, but in a drag race only format. James T may be considering such a swap in the next year or two.

-Bob

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heres my opinion. take your money and do a rb26 swap with a good aftermarket tranny and ford nine inch or comparable rear. in the long run you will have less money it the project and it will more then likely be faster then the same car setup in AWD.

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Guest Anonymous

no, people, you got me all wrong! i wasnt talking about the AWD setup. what i was talking about is RWD with the GT-R rear and front end, but the transfer case removed. i dont know about R34 or R33, but know for sure that it is possible to use the R32 gearbox with the RWD setup. a guy here in Oz has done it. but he's only using the engine and the box, not the the rear and front ends. so, my question is still unanswered, would it be possible to fit the GT-R suspension the way it is?

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no It wont fit....you would have to basically fabricate the entire underside of the car to fit the gtr suspension.

 

i think what your friend did was use a gearbox from a GTS-T its a 5 speed. the transfer case is apart of the tranny case and cant be removed... besides the GTS-T tranny is the same as the gtr internally without the transfer case.

 

do a search for AWD Z... there is one in japan that did what your talking about. but as described above its not real streetable... the intercooler sticks out past the stock bumper. i wouldnt mind doing it if i had the money for a track car but for a street car .... naaaaa i stick with my rear wheel drive soon to be nine inch.

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Guest Anonymous

another question, when you take out the AWD bits, do you just disconnect the driveshaft from the transfer box or do you remove the box completely? i would think that you remove it, because looking at the pics of the conversion i was talking about before (the one with the R32 engine and box), hes engine sits way at the back of the engine bay, like Brad has got. any ideas about that?

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you dont remove the bits. the tranny that is used in this swap is is the GTS-T 5 speed. it is the same as the gtr tranny internally so there is no point in trying to remove the parts from the AWD tranny. If thats the way someone is doing it he is wasting alot of time and money

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Guest Anonymous

stony, its not my friend. there was an article about him and the swap in one of the magazines. he's saying that he made the whole swap, engine and gearbox wise, with a help of a hulf-cut from japan. i dont see the point for him to lie. i'm trying to get in contact with him at the moment to see what exactly he did and how he did it.

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resistance is futile deadushki! 3 out of the 4 people who have responded to your thread have the RB26DETT engine in their z cars. there may be 3 or 4 more people who know as much about this swap in this car as they do but i would be willing to bet that if they say it is impractical it is.

just my .02.

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ok sorry misunderstood you. I guess maybe you could take the back half of the gts-t tranny and bolt it up to the gtr tranny but you would have to use the internals from the gts-t ...again waste of time. you could just unbolt the front driveshaft and leave it all there (you cant just cut of the transfer case) but if you leave the transfer case you will have to cut a hole in the floor to clear the hump in teh tranny... again not feasible. If thats what he did then i dont know what to say there is a much easier way to do it.

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  • 2 weeks later...
Guest BlackTTZ

Well there is a guy here in omaha that has the RB26 swaped into his 240sx. supposedly he has the GTR sixspeed tranny in it also. He had it modified to work with his setup by a shop here. I have not seen it in person, but I will soon hopefully. here are a couple pics. I can ask him about his setup some more if you like. he said the RB-25 tranny is not that reliable over 500rwhp.

 

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The rest are here.

http://www.neneons.org/gallery/view_album.php?set_albumName=album15&page=1

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he said the RB-25 tranny is not that reliable over 500rwhp.

And neither is the RB26 tranny. They are essentially the same internally. Not many transmissions are reliable over 500 hp.....

Man, look at how much of that motor is in front of the strut towers in the 240sx....wow.

-Bob

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Guest BlackTTZ

well the 240SX strut towers are already set back kind of far, but adding 2 more cyclinders on it doesn't help. here is an sr swap for comparison. I am just going off of what this guy told me. I had to ask him like 3 times that he had the six speed gtr tranny because I didn't think it was possible. He told me that one of his buddy's in japan said the 5speed tranny is not as strong as the 6 speed, but he doesn't know for sure. when I get a chance to meet him in person I will get all the info.

 

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it makes more sense to spend less man...

 

 

just get a gdmax twin plate or an exedy multi plate clutch and a hardened input shaft and you'll be fine. you'll be able to take all the power that RB can dish out

 

 

instead of spending all this money the best advice i can give you is to take a RB20 drop a GT-R crank and rodsin it and get some tomei 82mm pistons for it and then fit some GT-R valve springs or the equivilant and go with a nice t3/t04s hybrid or a gt25r.

 

the rb2.4 stroker can even support a T88 without that much trouble if you're into the drag scene....

 

 

by the way did i mention its 8500rpm redline with a GT25R and GT-R valve springs?

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  • 2 weeks later...

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