Bryan @PowertrainIndustries has replied back:

"Thanks for the update. *We are currently working on a few designs on this shaft to finalize both costs, and *more importantly performance and strength.*
To answer your questions:
Is the CF safe to be used for daily driven car?* Yes *Does the CF need servicing and does it need to be replaced after a certain number of years?*The ujoints will be the only*serviceable*part of the shaft. *We will be using Spicer Life joints that do not require re-greasing. *These are OE joints that will last on stock applications over 100,000 miles. *Depending on how hard each car is driven, I would suggest different service times. *For hard use it would be wise to have them looked at once a year. *Any binding or dryness of the joint will need replacing. *This can only be caused by excessive use. *Other wise they will hold up very well.*Would rocks or stone chip and weaken the CF driveshaft while driving?*You will more commonly have issues denting or damaging an aluminum shaft from*debris hitting it.**Torsional spring rate/twist memory between Aluminum VS CF? *The tortional strength of the carbon fiber shaft would be around 50,000 PSI depending on the length may vary slightly. *The Lateral Critical Speed will be nearly 13,500 RPM. *(Will not even get close. *I do not have a chart for Aluminum at the moment. *Safety between Aluminum VS CF? *View this link to ACPT's site: *http://www.acpt.com/Products/Composi...veshafts.aspxI will keep you updated on our R&D
Thanks again"

 

Mark @PST has replied back:

"Well this is not going to be very straight forward.* there are so many
variations of the shaft based on AT-MT AWD and RWD and year breaks. We will
need to get sorted out what fits what.* I looks like the 08-09 MT is the
most popular. I can get a shaft easily and if the parts are shaft I think
they are we are looking at $850-1000 on that shaft.* The rest of them we can
look at as time goes, the later model stuff may not be as easy. Let me know
what you think.*
It is our company policy not get involved with group buys as such. They are
always messy and since all of the shafts are custom built there are not any
real economics gained in producing more than a few at a time. But we will
give you guys a good price with a $100% warranty.*
Mark"

 

Im in ... 2008 MT !!!

 

1. Bong1012 (2008 G37S coupe 6MT RWD)
2. dal1307 (2008 G37S Coupe 5AT)
3. Polar_g37s (2008 G37S Coupe 6MT)
4. Chi-City-G
5. Kevalteam (2008 G37 Coupe 5AT)
6. SharpByCoop (2008 G37 Coupe 5AT)
7. huwee06 (2009 G37 Coupe 6MT)
8. Elperuano (2008 G37 Coupe 6MT)
9. eksigned (2013 G37S Coupe 6MT)
10. thebiglubinsky (2013 G37S Sedan 7AT)
11. Jamesshifflett (2011 37 Sedan 7at)
12. WARAT (2008 G37S coupe 6MT)
13. G37Stampa(2009 G37 coupe 6MT)
14. Oreoleo (2009 G37S coupe 6MT)
15. Viper62382
16. infamousstunna1 (2008 G37S coupe 6MT)
17. Sewlman2 (2008 G37S coupe 6MT)
18. venzz (2010 g37s coupe 7at)
19. NeverBoneStock (2008 G37S coupe 6MT)

Please copy and paste the last list after adding your name

 

The attempt of R&D begins I guess? Lol
We wait for his updates...

Mark @PST:

"Well judging from the pic that looks like a pretty long shaft.* If it is 55"
center to center on the joint then the critical speed is 5800 RPM very
dangerous.* I will try to get a shaft ordered today and should be able to
get accurate information for you late next week."

 

WOW! Your list is growing. What is the cost for these?

 

What picture is he looking at?

 

Hey bluedevils,
Not exactly sure yet... But estimated... Hopefully discounted afterwards for myG37 forum members lol...

Mark @PST has replied back:

"Well this is not going to be very straight forward.* there are so many
variations of the shaft based on AT-MT AWD and RWD and year breaks. We will
need to get sorted out what fits what.* I looks like the 08-09 MT is the
most popular. I can get a shaft easily and if the parts are shaft I think
they are we are looking at $850-1000 on that shaft.* The rest of them we can
look at as time goes, the later model stuff may not be as easy. Let me know
what you think.*
It is our company policy not get involved with group buys as such. They are
always messy and since all of the shafts are custom built there are not any
real economics gained in producing more than a few at a time. But we will
give you guys a good price with a $100% warranty.*
Mark"<!-- google_ad_section_end -->

He was looking at the Z1 motorsports 1-piece aluminum driveshaft VS oem factory driveshaft pictures posted in one of the threads here on this forum.

But since they have already made aluminum 1-piece driveshafts for G37 coupes, I dont see why they wouldn't be able to make one in carbon fiber... We will see.

 

Looking good~~~ can't wait~~ ^^

 

Oh, got it. His comment makes sense to me now as he was talking about the critical speed for the aluminum shaft.

 

Does anyone here have a detailed picture of the 2008 G37S Coupe 6MT RWD factory driveshaft?

Post here if so...

 

Does anyone here have a detailed picture of the 2008 G37S Coupe 6MT RWD factory driveshaft?

Is this it?

http://www.ebay.com/itm/370758899984?redirect=mobile

Post here if so...

 

The best person I probably ask is B Betty .. Can't remember if his is auto or a mt .. Hr might still have his laying around. Just call infiniti and ask what the part # is and than email this eBay company to see I it matches .

 

I'll try to work something out. Mark @PST just wanted to see it so that he knows he's getting the right OEM driveshaft for the G37 Coupe 6MT.

 

BB had 6MT, I am sure because he swap it with Z1 6MT aluminum driveshaft