One Piece Tailshaft

[7shades]

So I've noticed, in a lot of big HP conversions with upgraded differentials, some people prefer to go for a single tailshaft instead of doing a cut n shut on the rear section after the centre bearing.

 

Other than being cheaper to fabricate, are there any inherent benefits to a single shaft?

Does the KE70 centre bearing not handle HP very well?

 

Now bearing in mind I'm setting up my '70 to handle rather than slide, do you think a single shaft would be detrimental in that it would add to the unsprung weight of the rear suspended components?

 

Any related info or personal experiences would be appreciated.

 

Cheers

 

Jarad

[Teddy]

The 1 piece in my opinion shites over a 2 piece. Less moving parts, less chance of vibrations, less joints to flog out, less moving parts, Easier to work on :lolcry:

 

Ask Tony (TRD) on here about his experiences using the 'single' shaft :wink:

[Medicine_Man]

One piece shaft could be better balanced that the 2 piece is..

[coln72]

One of the reasons that Ford utes were speed limited was that the one piece tailshaft was harder to balance.

 

Plenty of early rollas handle pretty well with one piece shafts though.

[Redwarf]

Corolla's come with a two piece shaft??? :lolcry:

 

Not the ones I've played with! :wink:

[love ke70]

my ke70 does just fine with a 3" 1 peice shaft.

doesnt weigh much anyway

and i think you get a better angle with a single shaft

[WinKE55]

I had a similiar thought to. Which would be better out of a 1 piece and say a 2 piece.

 

 

My vote would be 1 piece is better as someone stated before. Less moving parts, less stuff to go wrong etc..

[styler]

i think 2 piece was meant to have less vibration but I'm definately for the 1 piece.

[WinKE55]

i think 2 piece was meant to have less vibration but I'm definately for the 1 piece.

 

 

2 piece tailshafts are to reduce vibration.

 

 

 

"Most modern cars have a two piece tailshaft. This is only to reduce vibration. (Have a look at one if you get a chance - One part is always longer than the other to reduce harmonic vibration. Clever!) For a performance car, this is a waste of time, and it should be replaced with a one piece unit. "

 

- http://www.billzilla.org/diffs.htm

 

 

"Modern vehicles often come equipped with multi-piece tailshafts, in order that maximum interior passenger space is achieved. A multi-piece shaft makes this possible because its sections can be set at slightly different angles, so wrapping around the underside of the cabin. Usually, the shaft leaves the gearbox at a slight downwards angle, then angling back upwards as it nears the differential. While all this sounds fine, unfortunately the more pieces a tailshaft is made from, the less reliable it is."

 

- http://autospeed.com/cms/A_108655/article.html

 

 

Sounds like the one piece tail shafts are the go for performance.

[TRD ke70]

The only KE70's that came with a 2 piece tail shaft were the Australian ones.

 

The Japaneses KE 70's were all one piece. hence the rally car having one.

 

2 piece tail shaft reducing vibration?, i think it increases it as the center bearing is attached to the tunnel and any vibration is transmitted directly to the body.

[love ke70]

well the big rubber damper is supposed to eliminate all those vibrations

[trd]

well the big rubber damper is supposed to eliminate all those vibrations

Yeh there called engine mounts,

 

i have just fitted a new one piece shaft to my spirit & i can tell ya the one piece shits all over the 2 piece. less moving parts, no vibrations = worth the money

 

as for handling, the only time this will affect it, is when a tailshaft isn't fitted. :lolcry:

[philbey]

He's talking aboutt he rubberised centre bearing found on 2 piece tailshafts, not engine mounts. Thats for vibration reduction.

 

With unis, the greater the angle they run at, the less efficient they are, due to the fluctating rotary acceleration. 1 piece shaft = longer radius = smaller angle of movement as the diff rises and falls. Therefore, 2 piece is less efficient at transmitting power than a 1 piece, plus the benefits of less parts to fail!

 

BUT - you do have more unsprung mass on your suspension...... semantics.

[irokin]

BUT - you do have more unsprung mass on your suspension...... semantics.

 

Nothing a spot of carbon composite can't fix (yes its full carbon, not carbon laid up over steel). A bargain at only $1600!

 

 

[styler]

haha 350z spec