Basically my setup consist of built motor, gt42, e85, built diff, 33box with dcs twin plate and intend on pushing 40psi thru it, now everything is up to the task and I'm worried about the tailshaft crapping itself on the 2step! I've spoken to a driveshaft builder in wa and recommend upgrading the thickness and unis but still states the the 33 yoke is still a weak point! He's sent off a sample to the U.S to get them remade in billet but there still awhile off! I know a mx7 tailshaft will be fine for dyno time as the car isn't under sever load but I intend on racing it after cpl dyno shows and cage gets put in! So basically wat are the guys with tuff manuals running tailshaft wise? And the costs to have urs made up.

did you speak to phil at final drive

Yer that's who told me to upgrade the overall diameter but also said that the yoke is still going to be a weak point!

mmm that is a tuff one of all people i would have thought he would have known best option for the yoke

The one thing he did say was that the genuine Nissan ones were alot stronger then the aftermarket,

yeah but still prob not strong enough i thought you were going a 2 speed powerglide a manual with that power will be stupid fun tho haha has the box been built tough from factory or still standard? ---------- Post added 19-12-11 at 16:50 ---------- another helpful contact would be harrop i have heard they make billet yokes for r33's a few of the high powered r33s

Na goin manual as auto is to easy. Stock but rebuilt 33 box, yer il look into it. Cheers There are a few guys on here making big pwr thru manuals so just wait to see wat they've done in terms of tailshafts!

yeah id be interested to know also as maybe one day ill get to big power once i blow the 25 and go 25/30

Mine still has standard yoke, 2piece and standard uni's and hasn't home bang yet, have done several 2step launches with 28x9's and 600kw

Not sayin it's not a weak point, I wa waitin for it to do it first go but have checked it after each time I've raced it and still all good

Jim berry full Monty and os giken gearsetted 34 box

Quote: Originally Posted by JET-64U [View Post] Mine still has standard yoke, 2piece and standard uni's and hasn't home bang yet, have done several 2step launches with 28x9's and 600kw Cheers bud, ur the man I was hoping would answer the question. I actually dug up ur thread in turbo section and asked the same thing, i mite just get mine rebuilt an hope for the best and look into getting a billet one made up! Is urs a mx7 tailshaft? Or does it have the 33 yoke adapted? If mx7 any chance u have the measurement for it as the one I have seems to stick in the back of the box just barely and could possibly get the front shaft extended by another 50-70mm, same as a mates who added 50mm to his :-/

Yeh normal mx7 yoke and shaft just rebuilt it that's all, yeh I noticed mine sticks out the back of the box abit when I fitted it.

Good luck with the setup mate

Cheers for the info man

I'll also be running a 42 sized turbo with a 33 box and wondered about the tailshaft, was just gnna get a custom one made, possibly one piece (massage the tunnel with a hammer) thanks for the info

If you guys are half serious I could look into getting carbon fibre tailshafts made for you.. Whats the spline count and diameter of the R33 Yoke?

I could look at getting some billet yokes made up, mines running an MX7 and is my daily so i cant pull it off to get dimensions, but if someone knew them i would make it up in CAD and stress test it with FEA to see how well it would stand up to punishment

Quote: Originally Posted by Duke57TT [View Post] If you guys are half serious I could look into getting carbon fibre tailshafts made for you.. Whats the spline count and diameter of the R33 Yoke? Now why would you post that somewhere I could see it?

Haha, Sorry bud. I'll do some tentative talking. I can get them made in whatever length it will just be the couple at both ends which will need sorting out. They are $180ish to ship and about $1000 bucks from memory. Rated at 1000hp and a 4000lb car. So rough a 150mph late model commodore.