Mjolitor 68

Any results or impressions regarding this ?

Thinking of upgrading

I imagine dropping 4# of rotating mass must help acceleration and maybe handling

MTIRC6Z

That 4 lbs is gunna be relatively inconsequential, it's very close to centerline...of course if you've already done a clutch (25 lbs) and brake rotors (32 lbs) and have wheels that aren't heavier than stock painted (22 lbs front & 26 lbs rear), well then, every little bit helps. The material properties make this DS interesting too, but if for some reason it has 'issues' it's not a simple swap back, this is the main reason I'm not going to bother with a C-F DS, at least not until there's more significant experience with them.

Of course Katech C-F valve covers will save about the same amount of weight as the C-F DS and they're a heck of a lot easier to install. And then there's a Braille 2015 battery, it's even easier to install and will save 20 lbs.

Trust you also have Caraviggio race seats (30 lbs), some light-weight coilovers (10 lbs) and L-T headers (20 lbs)???

Cheers, Paul.

IPS Motorsports

Jordan brought their race car out to our shop a little while back, and they had just recently installed the carbon fiber drive shaft.

Jordan took Jeff (owner) for a drive, and from my understanding the car is relatively stock engine wise, and from Jeff's description, the drive shaft made the throttle feel much lighter and more lively. The car sounded free in revs and down shifts, and did feel significantly quicker in an out of the throttle. Again I believe Pfadts race car was a stock LS7, obviously with all the suspension pieces. Jeff was very impressed, and will have one on its way for his C6Z shortly, and as well we will begin to stock this piece, so we can offer or CF member free shipping offers, and special promotions.

Also to the above poster, their is a significant difference in gravity weight, "dead weight" then rotational weight, comparing the drive shafts four pounds in weight savings is in no manner a compairson to carbon fiber valve covers. Just my .02

Regards
-Brandon

MTIRC6Z

I guess I forgot to put the smiley after the C-F valve cover comment, I wasn't completely serious, BUT, if 4 lbs off a DS is gunna make such a noticable difference, then what about 25 lbs off a clutch...and they're about the same effort level to change never mind similar cost. I presume you'd have at least as glowing comments about a 4 lb reduction in clutch weight?

So, I do have a little difficulty buying in on the significance of the 4 lb weight reduction, even if it is rotating. I'd have no trouble believing in the significance the material properities of this DS could have though.

Cheers, Paul.

OKsweetrides

^^^

It's all about inertia. The mass dropping off in the clutch change will be more noticeable since it's more likely to be "farther out there." Keeping mass closer to the centerline of rotation will be less impactful than keeping mass farther from centerline.

Your not going to notice much in a 4lb change, but it may have less twisting action (due to the CF d-s, but I'm not going to hash one way or the other on the material properties differences at the moment), so that may or may not be perceptible enough to count.

Dropping rotational mass is always good though!

Mjolitor 68

RE lightening I am already running a cf hood, valve covers, rad cover, front splitter, C6R wing, CCW wheels, Caravaggio seats,

Its also got a Katech Street Attack so the power to weight ratio is good

Going to look into that battery and I want to get the ZR1 roof too

novaz06

If you are going to do it, do it for the material properties, not the weight thing. It's almost inconsequential as rotating mass given the extremely small radius. I did some calculations once on this and was able to estimate with high confidence that you'd reap more benefit from reduced rotating mass simply by running worn-out tires vs. brand new ones or switching to polished z06 wheels from chrome. I realize these comparisons don't literally apply to your car but they are illustrative.

Mjolitor 68

How about titanium lug nuts ?

Katech_Zach

You forgot the three biggest weight savers on your car.
Your Brembo brakes
Your Exedy clutch
Your non-runflat tires

Your Motons help a little too.

Your splitter and wing add weight over the factory pieces.

I looked into titanium lug nuts and the cost is pretty high for very little savings. Also, the lug nuts are pretty close to the axis of rotation, where mass is not as critical.

Other things to consider for weight:
Remove AC (if you can deal with it and haven't done so already)
ClubSport exhaust system
Lift-off hood rather than hinged
Lexan rear window
Radio/speaker delete (if it is a track-only car)

Katech_Zach

Somebody should design carbon fiber axle shafts. Those babies are heavy!

Mjolitor 68

Its my road car and I'm in Miami so I really need the AC

Its almost as extreme as I can make it and keep it as a comfy daily driver too

Thats why I'm getting the GT1 Z06 to go extreme, just bcus I cant afford a C6R

Katech_Zach

Gotcha

kentz06

I drove the Pfadt car at TA09 and noticed immediately how it accelerated harder than my Z. I was surprised when Aaron told me the only non-stock drive train item was the CF drive shaft. I can imagine what it would be like with a lightened flywheel and clutch.

Dean

drabe

I've decided I'm going to clone myself in carbon fibre.

Mjolitor 68

I told my GF that after I get cremated I want part of my ashes turned into a diamond to go in a necklace so I'm always near nice jumblies

another thought would be to have my ashes forged into a carbon fiber vibrator

beanfree

You'd better hope some good looking lady buys you.

MTIRC6Z

I asked before and never got a quantification for the savings from a lexan rear window...any ideas?

Cheers, Paul.

2SINISTER

I would imagine it is a lot. Glass is heavy.

C6RAPTOR

I have a LG Motorsports CF drive shaft and it has eliminated high speed vibration at the track caused by the whipping action of the stock driveshaft.
I am a firm believer of reduction in rotating mass. I also replaced the flywheel/clutch with an Exedy twin disk from LGM with great results.
From what I have read about the Pfadt CF driveshaft it should give the same results.