please see post in For Sale section

 

http://www.300zx.co.uk/forums/showthread.php?s=&threadid=25018

 

The D/S 's are from ACPT, and you can see this thread for advantages / disadvantages of 1 piece drive shafts

http://www.300zx.co.uk/forums/showthread.php?s=&threadid=24683 .

 

It's quite expensive, so it'll be interesting to see what interest is generated.

 

:dance:

ohh ouch - :eek:

 

ok so im still interetsed but at those prices i will be amased if we get enough people for a group buy.

 

are there any alternatives? preferably in the UK

 

Regards,

 

Alex

From my search i think the prices that Jaffa gave us are the lowest

is it just the three of us then?

 

Regards,

 

Alex

I think there going to be more.A lot of guys showed interest in the trhead but the price is something to consider.I think with that money they would prefer something more noticable in terms of power gain or looks.

Been speaking to a Paul Lewis at CTG in Oxford - http://www.ctgltd.co.uk/technology.php?id=41&title=CTG+TORQline%99+Propshafts+and+Driveshafts

 

With only 3 - 4 people we'd be looking at about £1k each, but it would be cheaper with more takers, obviously. Apparently it could less then £1k, depending on whether the ends are cast or splines. Also depends on how large it is.

 

They'd need an old propshaft as a model.

Do we have any plans/diagrams available to send them ?

 

Cheers!

konrad

hi konrad ,

 

good call - i emailed these people over the weekend to see if they were interetsed - maybe andyz has a 2nd hand propsahft we can borrow.

 

 

regards,

 

alex

Paul tells me they help turbos spool up quicker (as much as 200rpm lower) due to the decrease in mass being rotated. Might explain why some report the car being more driveable ?

 

What I didn't ask him was whether they'll fit them there, thus saving the carriage cost as well as the import rip off tax from the cost of the US one. I'll ask him that if/when we get hold of an OE spec diagram.

 

:cool:

Originally posted by konrad

Paul tells me they help turbos spool up quicker (as much as 200rpm lower) due to the decrease in mass being rotated. Might explain why some report the car being more driveable ?

 

Does this sound reasonable or should I go out and buy some stripey paint and some sky hooks ?

sounds like a joke - wouldn't have thought it wouldn't be strong enough or too brittle.:confused:

 

nice to see mass reduction being given it's rightful place ;)

just to add that the reason I went with ACPT was due to the fact they've done loads for the 300 before, and don't to be sent dimensions etc.

 

May even be worth asking a couple of US clubs to up the numbers.

 

J

hi konrad,

 

it sounds completely correct to me - it has exactly the same effect as reducing the weight of the flywheel - less power is lost - due to the engine not having to rotate so much mass around.

 

It should have a bigger effect than changing the flywheel because the mass difference is more. ok so the weight difference may only be 7-8 kg but if you change to an aluminium flywheel, cf propshaft and aluminium underdrive pulley you might be saving a significant amount of weight that the engine has got to start rotating before the power even gets to the rear wheels. All this means a free revving engine, better pick up hence turbo spool up, and a lighter car.

- and.........

 

....as nelson said "nice to see mass reduction given it rightful place"

 

PLUS its a single piece so better feeling of the power transmission because the single piece cf doesnt twist as mucj as a steel and certainly not as much as a twin piece

 

PLUS because of the composite nauture of cf it naturally dampens down transmission vibration.

 

Regards,

 

Alex

 

p.s.

 

just suppose these figures are correct

 

aluminium flywheel turbo spool up 100 rp quicker

alumium underdrive pulley turbo spool up 100 rpm quicker

cf propshaft turbo spool up 200 rpm quicker

divorced wastegate downpipes turbo spool up 100 rpm quicker

vernier pulleys advanced cam timing turbo spool up 300 rpm quicker.

Roller bearing turbos trubo spool up 500 rpm quicker.

 

do you see where i'm going with this :D

Got a response from Paul ast CTG -

 

"Conrad,

 

Sorry not to get back to you sooner - I've been away on business.

 

Having looked at the diagram, it seems that the prop is within the scope of what we are pursuing as a broader plan. Having developed and seen notable success with our bespoke motorsport props, our aim is to select from typical components the elements of a composite solution for production cars. This will streamline the process and enable us to offer competitive prices for our components.

 

We would, therefore, be interested in developing a prop for the 300ZX, but would need to see the existing prop and the car for measuring/specifying the components. Unfortunately the link forwarded only offers maintenance information regarding the prop.

 

As the prop is only vaguely defined at this stage, I can only confirm the budgetary pricing of approx. £1000/unit (we'll use in-house mandrels.) However, it is unlikely that this figure will change significantly. We would look at developing a 1st off prototype for testing on one of your cars, and then quickly follow with the required quantities for other interested members.

 

Did the members of your forum seem interested by the proposal? I look forward to hearing from you.

 

Best Regards,

 

Paul Lewis

Business Development Engineer

CTG - Crompton Technology Group Ltd

http://www.ctgltd.co.uk

Tel:01295 220130

Fax:01295 220138"

 

Let me know what you think ! Oi - not that ! :D

still interested - if he can get me a single piece cf prop for £1000 i'm in - hasnt anyone got a second hand prop we can send in?

 

Regards,

 

Alex