Thanx mark for the info. This will be a must get for me.

 

Update:

Car is alive, but still installing stage 2 fuel system. I have a 2 week trip planned so the CF vs OEM DS dyno will have to wait another few weeks. But dyno results will be posted as is.

i promise to do a comparison however, we are talking 27-30psi on a Vortech. lol

 

Any new updates G Zilla?

 

I need one of these can't wait for the numbers

 

Has any one done a before and after dyno on these?

 

there has been a before and after dyno with the z1 aluminum driveshaft and it gained throughout the powerband. its inside this thread somewhere. i would expect the results of the cf shaft to be nearly directly comparable, at there is only a 1lb difference between the two.

 

im going to contact dss for my mt coupe and post

 

^why not just call Powertrain Industries since they're already proven and local?

 

Here is the response from driveshafts specialists. ",We have done some of these but have essentially taken them of the market. The largest tube that will fit is a 3.5" and at very high speeds the driveshaft rpm exceeds the critical speed of the tube. Then we have vibration issues and potential failure. Thanks for the inquiry though".

 

^you done not taking our advice yet?

 

Ya. I think im going to give in and get the acpt carbon. The gains on the dynos are discouraging though. The numbers on the aluminum seem better for some reason. I wish z1 would chime in and give us poor folks some hope

 

the numbers come from weight reduction. try both shafts on the same car and its gonna be the same thing. i dont see how two different shafts with a similar moment of inertia and weight are going to produce different amounts of power. furthermore, to hell with the numbers, the people that have bought them were happy with the results. they could really feel a difference. i say go for it. i am.

 

you really need to do more research or at least read through this thread completely, stop posting misinformation

 

GTM also has one that is not listed on their site. You can call them to order. I'm most probably going to buy one for my car from them.

 

^i would be extremely surprised if GTM's where NOT made by Powertrain Industries