JLee81

Can it minimize the transitional loss from FR cars? Please let me know.

OzE55

What ????????????????????????????

BlackCard

"...3M Film(fully covers the vehicle), ..." That's kindof extreme, huh?

bfnnrgn

Your AMG is amphibious?

JLee81

I read about CF driveshaft can increase hp by reducing weight on rotating mass of the car. I have seen american cars get more than 10 rwhp from just changing it. That's what I am asking.

JLee81

A lot of cars here in Korea are covered with 3M protection film. And it is very clean installation using the largest sheet available. Certainly better than most american installations I have seen when I lived in the states. Most Enzos Zondas DTMs Exotics and AMGs & Ms are covered with protecition film to keep the resale value by protecting original paint from stone chips. Costs about 3G to do that. It is normal here considering the fact that the price of any import cars cost almost twice as much as the price of the US. because of one accident or a paint job on the hood or just a simple swap of door skin without any internal damages of the door parts, owners can lose upto 20G on AMGs here. Now think about it. What would you do?

JLee81

Yes! a fast and wild one.

bfnnrgn

Ah, driveshaft. Your thread title said propeller shaft, like on a boat.

I thought maybe you converted your cars to be amphibious like the Australian guy who made an amphibious ATV.

Jrocket

I would move.

dsc

Yes, if you lose weight in the drive shaft you should translate more hp to the wheels. I know Mustang people do this to gain more power to wheels.

vixapphire

do you mean those little propeller things that guys put in the trailer hitch of their SUV's?

JLee81

I mean driveshaft the link between transmission and differential I think.
Would there be any makers that would produce such shaft for our cars?

vader

These guy may be able to help http://www.pstds.com/

JLee81

I already sent them an email and got a reply saying that they don't have one available for our cars.

OzE55

Maybe I'm missing the point.............but why would you go to all that trouble and expense for 10rwhp?
There are tons of mods which would give better bang for the buck.

stevebez

I dont see how a lighter propshaft is going to make any difference to max power ... what it will do is make instantaneous power delivery more direct as there is less inertia, and the energy originally used to move the old prop mass is now moving the wheels... I am not so sure this remains the case when you get to max power as the speed of the shaft turning reaches a peak and there the differences are no longer inertia but friction. These differences between a light one or a heavy one are minimal in my view. So you will have better instanteous response -- but I doubt vmax would be any better.

In our cars with this massive torque delivery I would think a carbon fibre prop shaft could quite easily be shreaded especially where its mated to the metal coupling ...

Can some engineer (or any one else for that matter) explain if and why I am wrong please?

JLee81

Because it is always good to have other options available when people are only talking about pulley and ecu and header and cams and etc. WHy not driveshaft? I say. Because those obvious mods are maybe too boring in my taste?

mclarenm8d

JLee81, I understand why you want to try this, I've done it on other cars. However, I've never considered it for the 55K for some of the reasons stevebez mentions.

On a percentage basis, there isn't much improvement considering the 55K's already put out ~500HP/500lbft, are relatively heavy cars, and have relatively heavy drivetrains. Might not notice much of a difference in RPM gain given that the SC drags that down.

If you could find someone that can do it cheaply, then yeah, it's a route.

I actually go with lighter driveshafts to solve harmonics problems with live-axle American V8 musclecars. The harmonics isn't much of an issue in the 55Ks with our 2.65 ring and pinion and our independent rear suspensions.

Oh, that's another thing - 2.65 ring and pinion means the driveshaft isn't spinning as much at any given mph as say, a car with a 4.10. So, benefit would be even less in our cars.

RobertG

A gain in HP is still a gain in HP, if it give you a slight edge over the next guy then it's worth it.

vader

If they use them on 1200 horsepower monster trucks I think they will hold up under our barge.