Why is the stock one in 2 peices to start with? Is it so it can flex when going over bumps and cause less stress on the diff and box?

 

Trying to think what could be causeing my speed related vibrations in my car. The tracking is correct as is the balancing. There is a possibility that one of the wheels has got buckled.

 

The only other thing I can think of is the centre prop bearing.

 

I was wondering if it is worth getting a 1 peice one. It is a little bit lighter than OEM and more than strong enough, but should save a few HP because there is no bearing to turn and no centre joint to lose power.

 

What your thoughts?

 

Stuart

The oem prop is in two pieces because a two piece prop can handle more power!

Why is the stock one in 2 peices to start with? Is it so it can flex when going over bumps and cause less stress on the diff and box?

 

Trying to think what could be causeing my speed related vibrations in my car. The tracking is correct as is the balancing. There is a possibility that one of the wheels has got buckled.

 

The only other thing I can think of is the centre prop bearing.

 

 

What your thoughts?

 

Stuart

 

Have you checked the U J`s on the prop?

could be a bearing gone in it.

 

Cheerz, mickey

The oem prop is in two pieces because a two piece prop can handle more power!

 

 

Ahhh didnt know that. The ones I am looking at say they excees the strenght of the OEM one.

 

Have you checked the U J`s on the prop?

could be a bearing gone in it.

Well my next port of call is something to do with the propshaft. These 1 peice ones are about twice as much as the brearing alone and if it saves power and gets rid of the need for a bearing, it may be worth it.

 

Stuart

I saw some 1 piece carbon jobs at the Autosport show; they were fantastic, so light, about 2-3Kg I'd say.

 

On what grounds do you say 2 piece are stonger Mark?

 

I'd love one but I'm not sure that anyone 'needs' one.

 

On what grounds do you say 2 piece are stonger Mark?

 

Saw it in a post somewhere, I believe they can make the shorter two piece props out of thinner/lighter material than a one piece prop!

 

I believe Shahid found a place that sorted his prop out!

 

If you get a one piece, get a carbon fibre one, if they go then it just falls apart into a threadlike material. The metal just shears up through your floorpan, legs, etc!

1 piece driveshaft is better but dont go for carbon fiber. I'm corrently ordering 1 and i'm thinking of aluminium or the 1 from Z1, i was looking for a carbon 1 and JUN's advise was that i doesnt make any difference except if u have huge hp and you need the strength and the weight reduction a good 1 is over 600ukp. The from ACPT that i asked about was $1200 for the 2+2

 

Well my next port of call is something to do with the propshaft. These 1 peice ones are about twice as much as the brearing alone and if it saves power and gets rid of the need for a bearing, it may be worth it.

 

Stuart

 

I mean the bearings in the UJ`s, not the centre bearing.

 

cheerz, mickey

I mean the bearings in the UJ`s, not the centre bearing.

 

cheerz, mickey

 

Tell you very soon as my one piece was shipped on Friday ( PS did I mention it's carbon :hyper: )

The oem prop is in two pieces because a two piece prop can handle more power!

 

I disagree. A CF prop is many times stronger than a steel one. In fact the UJ's are the limiting factor in power terms if you're talking breaking force.

 

However, a CF prop is more expensive to manufacture, and more difficult to balance than a steel one.

1 piece driveshaft is better but dont go for carbon fiber. I'm corrently ordering 1 and i'm thinking of aluminium or the 1 from Z1, i was looking for a carbon 1 and JUN's advise was that i doesnt make any difference except if u have huge hp and you need the strength and the weight reduction a good 1 is over 600ukp. The from ACPT that i asked about was $1200 for the 2+2

 

I've got an ACPT. Why not get one? Same price as a turbo, and will last a damn site longer??

I've got an ACPT. Why not get one? Same price as a turbo, and will last a damn site longer??

 

 

LOL, damn right and with the USD where it is at the mo why not?

Just checked my credit card statement, and it's come to 407 pounds!! (inc. delivery) Now just duty to add and cross-fingers it fits OK :eek: :x:

 

Will post details of where etc once I'm happy with it on the car

I disagree. A CF prop is many times stronger than a steel one. In fact the UJ's are the limiting factor in power terms if you're talking breaking force.

 

However, a CF prop is more expensive to manufacture, and more difficult to balance than a steel one.

 

It was said meaning in the original manufacturing process, ie all other things being equal.

1 piece driveshaft is better but dont go for carbon fiber. I'm corrently ordering 1 and i'm thinking of aluminium or the 1 from Z1, i was looking for a carbon 1 and JUN's advise was that i doesnt make any difference except if u have huge hp and you need the strength and the weight reduction a good 1 is over 600ukp. The from ACPT that i asked about was $1200 for the 2+2

 

 

I am looking at the ones from Z1, so you will have to tell me what they are like.

If i go for the z1 i'll tell you how it is. Well there are a lot of other things to spend $1200 rather than a cf shaft, which there are going to be more usefull. Anyway if i'll get 1 i'll go for the Greddy a bit expensive but 1 of the best on the market

wasnt konrad looking into a group buy from a UK manufcaturer - CTG ?

 

Regards,

 

alex

There is also the risk of a single piece shaft starting to whip like a skipping rope at very high zed type speeds at which point it might self destruct - not nice - then again where in UK can you go that fast?

There is also the risk of a single piece shaft starting to whip like a skipping rope at very high zed type speeds at which point it might self destruct - not nice - then again where in UK can you go that fast?

 

A very scary though with a single piece steel or aluminium shaft. But not a problem with CF.

CF naturally rejects any standing waves, and even if an external force were applied to shatter a CF shaft, it'll splay like a paintbrush when pushed against a flat surface, causing little or no damage to the vehicle. (I must admit this was of high importance to me before I bought one).

 

Hope this helps make anyones mind up, well worth the extra few quid IMO, since the damage to person and Z is un-imaginable with a steel shaft flailing around if the worst happened.

 

350Zs are equipped with CF props to BTW.

wasnt konrad looking into a group buy from a UK manufcaturer - CTG ?

 

Regards,

 

alex

 

I know some one was looking at getting them. But for £1000 I dont think it will make enough different to a Z with modist mods. Well not £1000 worth of difference.

I think that it is preferable to retain the split prop and centre bearing for the following reasons;

1. The one piece is more likely to deform or whip at high revolutions when mixed with suspension/rear axle movement caused by undulations or changes in the road surface.

 

2. The extra support provided by the centre bearing gives the rear gearbox mounting a helping hand under conditions of high/extreme torque. (They go weak quick enough as it is).

 

3. Something tells me, that to fit a one piece prop at the manufacturing stage would have been easier and cheaper (less parts, less time etc). So why didn't Nissan do it? perhaps they wanted their flagship muscle car (at the time anyway) to have a more stable drive train.

 

Only change kit if it makes you go faster, stop quicker, look better or does everything you can do now, cheaper.

 

Modding to a one piece fails on all the above.

I think that it is preferable to retain the split prop and centre bearing for the following reasons;

1. The one piece is more likely to deform or whip at high revolutions when mixed with suspension/rear axle movement caused by undulations or changes in the road surface.

 

2. The extra support provided by the centre bearing gives the rear gearbox mounting a helping hand under conditions of high/extreme torque. (They go weak quick enough as it is).

 

3. Something tells me, that to fit a one piece prop at the manufacturing stage would have been easier and cheaper (less parts, less time etc). So why didn't Nissan do it? perhaps they wanted their flagship muscle car (at the time anyway) to have a more stable drive train.

 

Only change kit if it makes you go faster, stop quicker, look better or does everything you can do now, cheaper.

 

Modding to a one piece fails on all the above.

 

 

I disagree

 

2 reasons why i want a cf propshaft

 

1 - it saves weight

2 - it has less turning momentum therefore quicker turbo spool up and more responisiveness. (eaxactly the same reason why anyone wants a fidanza flywheel.)

 

let me know the deals out there and it will be the next thing on my shopping list

 

Regards,

 

alex

I must admit unless you have severe propshaft problems I have to agree!

 

Spend the £400+ on something you know will definately make you go faster!

I must admit unless you have severe propshaft problems I have to agree!

 

Spend the £400+ on something you know will definately make you go faster!

 

 

i agree - lets have a group buy on a decent manifold - i'm sure i read that a good one can get 30hp extra

 

then a cf propshaft ;)

 

Regards,

 

alex

I think that it is preferable to retain the split prop and centre bearing for the following reasons;

1. The one piece is more likely to deform or whip at high revolutions when mixed with suspension/rear axle movement caused by undulations or changes in the road surface.

 

2. The extra support provided by the centre bearing gives the rear gearbox mounting a helping hand under conditions of high/extreme torque. (They go weak quick enough as it is).

 

3. Something tells me, that to fit a one piece prop at the manufacturing stage would have been easier and cheaper (less parts, less time etc). So why didn't Nissan do it? perhaps they wanted their flagship muscle car (at the time anyway) to have a more stable drive train.

 

Only change kit if it makes you go faster, stop quicker, look better or does everything you can do now, cheaper.

 

Modding to a one piece fails on all the above.

 

 

1) I cant see how a propshaft can whip like a skipping rope but a propshaft in 2 peices with a hinge in the middle wont.

 

2) What goes weak quick enough? The gear boxes? I have never heard of any one with gearbox internals breaking besides Autos, and even then the parts are usually just worn down.

 

3) Shorter pieces are stronger than longer parts. Its harder to bend and snap shorter pieces. So to make a propshaft strong enough for is car it will be cheaper to make 2 smaller parts and join them than 1 long prop shaft.

I think that it is preferable to retain the split prop and centre bearing for the following reasons;

1. The one piece is more likely to deform or whip at high revolutions when mixed with suspension/rear axle movement caused by undulations or changes in the road surface.

 

2. The extra support provided by the centre bearing gives the rear gearbox mounting a helping hand under conditions of high/extreme torque. (They go weak quick enough as it is).

 

3. Something tells me, that to fit a one piece prop at the manufacturing stage would have been easier and cheaper (less parts, less time etc). So why didn't Nissan do it? perhaps they wanted their flagship muscle car (at the time anyway) to have a more stable drive train.

 

Only change kit if it makes you go faster, stop quicker, look better or does everything you can do now, cheaper.

 

Modding to a one piece fails on all the above.

 

So you think they've fitted them to the new 350Z for fun?

My current propshaft has worn UJ's and a duff centre bearing so this is actually cheaper than a replacement for me.

 

1-piece will transfer torque better and will also save some HP due to it being about a third of the weight of the stock one.

 

I've gone for the c/f 1-piece to avoid the whip that you can get with a 1-piece of this length.

 

I personally think that if the 300ZX was built now it would be 1-piece carbon one, but 14 years ago it wasn't really an option!!