levi.fogg

You lose approximately 16% of your horsepower from the crank of your engine to the rear wheels. Heres my theory, if you buy an aluminum driveshaft that is half the weight of the original do you think it would cut your loss down to 8%? This would make sense because the driveshaft is the only major thing that is located between your motor and wheels. I know some people say that buying a new driveshaft wont do anything for your horsepower. It frees up horsepower though. Let me know if this reasoning sounds correct and if not why.

tigercrazy718

im pretty sure with rotational mass its not that simple bc the formula isnt that simple
but i took physics 2 semesters ago so i dont remember exactly lol

Red-GT500

The rotational mass is not just the driveshaft, it is everything from the flywheel to the tires. This means Clutch > Transmission Gears > Driveshaft > Ring and Pinion > Axels > Brakes > Wheels > Tires. So no you will not cut your HP loss by half, maybe if you are lucky you can get it to 15% or maybe on a good day 14.5%. There isnt a lot of weight difference in the Driveshaft compared to the transmission and the rearend + wheels and tires. So it may help you out but it wont be a drastic improvement. The only thing you may notice is that the car can rev a tiny bit faster.

howarmat

you free up some HP but only like 10 HP maybe. The 1 piece aluminum DS has other benefits also

Mudflap

The greatest benefit of the DS in my opinion, is the "feel". I had a shaftmasters unit on my 2009 GT, and the entire driveline felt much tighter and more connected. It also felt like I had cut loose a boat anchor I had been towing around.

Blacksmoke

I have heard from some that the alum driveshafts are extremely
noisy and can cause problems especially if things like rocks,etc. get
thrown at it because of the weak alum.

This true?

VistaBlue

An aluminum driveshaft with a tune, put on at the same time, will literally make you giggle until your face hurts the first time you row through the gears.

The difference in throttle response and revving is drastic.

Nuke

Your assumption is based on the DS being the source of the 16% loss. What you've missed is that the 16% loss is accumulated from not just the DS but from other rotational mass including your wheels and tires, plus other "drag" on the engine such as the water pump, alternator, etc..

Based on forum feedback, it seems that 3-5 RWHP free-up is the best-guess. Some feel it; some don't. And about 4-5 RWHP is the typical "butt-dyno" sensitivity level.

2005Redfire6

Can't say Ive ever heard of that being an issue.

908ssp

It is weird. When Ford does something the cheap way you guys are quick to defend it. but when Ford spends three times as much money on something you want to remove it. Ford would have put a "one piece" [it is not really one piece at all] drive shaft on if they didn't cause more problems then the benefit of putting on a three bearing shaft. Ford doesn't spend money just to make the car slow.