Any experience with calculating these gains?

[Frostyman]

Originally Posted by Dustin

PST Carbon Driveshaft - 13.9 lbs - $1100
DSS Carbon Driveshaft - 12.2 lbs $1000
DSS Aluminum Driveshaft - 13.2 lbs - $438
Axle Exchange Aluminum Driveshaft - 12.? lbs - $425

How is Carbon DS > Aluminum? Explain that one to me.

An extra $600 - $700 to save potentially 1 extra pound of ratational mass does not seem "better" to me. And the only reason I say potentially saving 1 pound is if you were only looking at the DSS. You could potentially save approximately 1 pound of rotational mass AND save $675 if your two options were PST and Axle Exchange.

Just food for thought.

Honestly, the aluminum shaft will be better for most people, as it has a lower max torque application than the 1200hp rated carbon fiber ones.

[cslntuee]

Originally Posted by Dustin

I doubt with these mods anyone would be worried about the noise level of adding a driveshaft.

Sorry. I am off the topic. I am asking my case which still keep the stock

exhaust.

I am still debating should go with carbon fiber or aluminum driveshaft.

I read both product description.

http://ft86speedfactory.com/drivesha...t-at-1141.html

http://ft86speedfactory.com/drivesha...t-at-1142.html

I notice that the carbon fiber one mention " it will also make a noticeable difference on the noise level in the car", but the aluminum one did not mention this benefit which bring my concern.

Thanks a lot for your suggestion.

[FreshFRS]

carbon fibre is a vibration damper, compared to an aluminum driveshaft you will feel less vibration from the cars various rotating assemblies, conversely aluminum is lightweight sure, but it can transmit vibration instead of absorbing it. NVH from stiffer bushings such as rear diff cradle and even subframe locks will be less noticeable with the carbon shaft. atleast in my experience. carbon is worth the cost IMHO.

[Dustin]

Taken from another thread in regards to the aluminum driveshaft......

Originally Posted by slates74

No notable increase in NVH and no vibration issues at any speed. Feels as smooth as stock, if not smoother. Shifts feel more positive when engaging into each gear. The only notable change in sound is that the typical noise you hear from the trans at low speed even with the stock shaft, is slightly more audible, likely because of the hollow construction of the driveshaft and the one piece design that removes all of the connecting points of the stock two piece driveshaft. I only noticed it the first time I drove the car and really can't tell the difference now.

[cslntuee]

Originally Posted by Frostyman

Honestly, the aluminum shaft will be better for most people, as it has a lower max torque application than the 1200hp rated carbon fiber ones.

Will the carbon one slight increase in RWHP than aluminum one, due to

smaller diameter?

Thanks.

[Dustin]

It won't increase HP so to speak. It only frees up power that was used to spin the extra weight in the factory drive shaft. That being said, the diameter doesn't matter so much as the weight does. The one with the lighter weight will not take as much power to spin as one with more weight. But the 1 pound give or take depending on the driveshaft with be almost negligible when considering the aftermarket options.

[cslntuee]

Originally Posted by Dustin

It won't increase HP so to speak. It only frees up power that was used to spin the extra weight in the factory drive shaft. That being said, the diameter doesn't matter so much as the weight does. The one with the lighter weight will not take as much power to spin as one with more weight. But the 1 pound give or take depending on the driveshaft with be almost negligible when considering the aftermarket options.

I checked the testing result which only 4Hp different.

http://theattack.rallysportdirect.com/2012/09/new-products-brzfrs-pst-carbon-fiber-driveshaft

Is there any benefit for the carbon fiber one? I heard that 350Z( or 370Z)

and GTR using carbon fiber driveshaft.

I will go with aluminum one, if there is no benefit from the carbon fiber one.

Which aluminum one you recommend (Axle Exchange or Dss)?

Axle Exchange wrote "This one piece 3" aluminum shaft saves you almost 17lbs !"

Does that mean only 7.2 lbs (24.2-17)?

http://www.axle-exchange.com/inc/sdetail/29/399

Thanks again.

[neurokinetik]

Originally Posted by Anthony

Oh, and for batteries, the two best that I know of would be:

4.96lbs - Shorai LFX36L3-BS12 - ~$350
3.90lbs - Super B 10P - ~$750

Shorai is actually only $260. At least, that's what I paid from Amazon. Also does not absolutely require a special charger, either, according to the manual that comes with the battery. But if you do want to use the Shorai charger, it is a little over $75.

[SPCorBUST]

Originally Posted by suaveflooder

It sounds like you already pretty much know your answer. You will probably get about 20-30 horse overall to the wheels, but with the rotational mass being much lower, the car is going to clime the RPM range MUCH quicker.

This is the rout I'm going as well. It may not be a horsepower beast, but it'll still be quick

Originally Posted by suaveflooder

It sounds like you already pretty much know your answer. You will probably get about 20-30 horse overall to the wheels, but with the rotational mass being much lower, the car is going to clime the RPM range MUCH quicker.

This is the rout I'm going as well. It may not be a horsepower beast, but it'll still be quick

yeah i just wanted to get some confirmation

In the Open Tablet thread, it looks like they picked up ~20 from the tune on 91 alone... i'm optimistically hoping for ~50 but before I do any binge shopping on parts I wanted to see if anybody else has gone this route.

Here's my estimate, not sure how off-base it is, so corrections welcome:

Engine: ~2
Perrin crank pulley

Clutch: ~3
Undecided, lightweight street clutch and flywheel

Driveshaft: ~3
DSS or PST carbon fiber driveshaft

Fuel: ~20
e85 and 91 tunes, likely with OpenTablet

Exhaust: ~15
Borla UEL (sound profile, not max HP)
Perrin overpipe
Perrin catted front pipe
Invidia N1 exhaust

Wheels: (maybe)
Undecided, lightweight

[SPCorBUST]

Originally Posted by Dustin

PST Carbon Driveshaft - 13.9 lbs - $1100
DSS Carbon Driveshaft - 12.2 lbs $1000
DSS Aluminum Driveshaft - 13.2 lbs - $438
Axle Exchange Aluminum Driveshaft - 12.? lbs - $425

How is Carbon DS > Aluminum? Explain that one to me.

An extra $600 - $700 to save potentially 1 extra pound of ratational mass does not seem "better" to me. And the only reason I say potentially saving 1 pound is if you were only looking at the DSS. You could potentially save approximately 1 pound of rotational mass AND save $675 if your two options were PST and Axle Exchange.

Just food for thought.

I said as far as weight goes, for which you proved my point

I did not claim that one was "better" than the other... No need to get the panties in a bunch. :happy0180:

Thanks for providing the weight of the other shafts, I was wondering about that. Cool note, if anybody is interested in the DSS shaft they have a nice video about their process and testing them as well!

[Anthony]

Originally Posted by Dustin

PST Carbon Driveshaft - 13.9 lbs - $1100
DSS Carbon Driveshaft - 12.2 lbs $1000
DSS Aluminum Driveshaft - 13.2 lbs - $438
Axle Exchange Aluminum Driveshaft - 12.? lbs - $425

Oh man, I didn't know the Axle Exchange one was that light. I'll have to look into that one.

Originally Posted by Frostyman

Honestly, the aluminum shaft will be better for most people, as it has a lower max torque application than the 1200hp rated carbon fiber ones.

The carbon fiber ones are rated for that much!? Last I saw, their limit was still unkown to the community. I can't remember specifically which one the thread I was reading was talking about, but holy shit, 1200hp?! Strange they rate it in horsepower and not torque, though.

Originally Posted by neurokinetik

Shorai is actually only $260. At least, that's what I paid from Amazon. Also does not absolutely require a special charger, either, according to the manual that comes with the battery. But if you do want to use the Shorai charger, it is a little over $75.

Oh man! I was just going off Shorai's website. Didn't realize the savings elsewhere. And are you implying the Super B one will or might need a special charger?

Maybe @JRitt can give some insight on living with a Super B battery.

[Dustin]

Originally Posted by SPCorBUST

I said as far as weight goes, for which you proved my point

I did not claim that one was "better" than the other... No need to get the panties in a bunch. :happy0180:

Thanks for providing the weight of the other shafts, I was wondering about that. Cool note, if anybody is interested in the DSS shaft they have a nice video about their process and testing them as well!

No panties in any bunch. I come off very direct at times I guess but was only trying to inform. I don't see how I proved your point though. Unless I read your statement incorrectly which is possible. When you said greater than (Carbon DS > Aluminum) I took that as you meaning the carbon was better than the aluminum. Did you mean that the weight of the carbon was greater than the aluminum? Meaning the carbon ds is heavier?

[Anthony]

Originally Posted by StormTrooper

Never mind I didn't read the post lol

LOL @ reason for editing. Yeah, I don't remember what you had said, but I remember being confused by it, haha.

[continuecrushing]

Haha op, I knew your sn looked familiar...I was on srtforums with you! Morgantj13 on there, with flame red srt.

Sorry for being off topic lol

Ill probably see you one of these days, I'm no longer in OC, but I'm up there a lot for work/family.