fredlo69

Im blue at the face explaining to a buddy of mine that an aluminum driveshaft will not increase your horsepower. He believes the advertisment •14HP peak increase, and 16 ft/lb of torque increase.
I explained more than likely you will have a .21 Second Reduction in 1/4 Mile E.T.
Please those who have this upgrade in lighten us.
We will be treating ourselves with shaftmasters aluminum driveshaft for christmas.
Hoping to getting the best price possible.

Lax07

It will free up horsepower from your engine that is currently being lost in the power transfer in your stock driveshaft aka making your engine more efficient.

Intervention

Wel, it certainly will not increase your CRANK or flywheeel horsepower. If anything, it will lower your drivetrain loss from lets say 15% to 14%, therefore you lose less HP by powering the rear wheels.

So in the end, you might be making a few more HP to the wheels, but the engine itself is not making any more power

fredlo69

So would there be a horsepower increase in a dyno run?
His last dyno run was at 287 horses. When he dynos vehicle after driveshaft upgrade will the dyno show an increase in power? If I understand correctly it will.

fredlo69

Its clear now, its free-ing up horsepower it was lossing with the heavy clunky 2 piece driveshaft. The vehicle is not actually increasing more horses but putting more available horse power to the wheels. Thanks everyone for your input.

Nuke

It's actually a REDUCTION in the LOSSES in the drivetrain. As said above, there'll be no change in crank HP but, with less lose in the drivetrain, that means more RWHP. But tell your buddy not to expect 14 more RWHP. That's just advertised BS. It's more like ~3-5 RWHP or so.

65Raven65

"They" used to say that for every pound of rotating mass you can save, you actually save around 3 pounds of drag on the motor. In other words, (just using round numbers, I dont know the actual specs) lets say a stock driveshaft is 30 pounds and an aluminum driveshaft is 25 pounds. Even though the weight difference is 5 pounds, youre reducing 15 pounds worth of drag on the motor.

Of course, "they" could be full of it!

Nuke

The stock DS is more like ~41 pounds.

timmbo

Is the one piece driveshaft a simple bolt on or do you need to be concerned with having to adjust the driveline angle? Is one brand of one piece drive shaft better than the other?

Doogie65

Most one piece aluminum driveshafts are indeed a simple bolt-on... assuming you get one that comes with the adapter plate like a Coast or PowerHouse. And although most vendors recommend an adjustable UCA, unless you have some radical lowering springs, you can get away without one.

In case anyone is interested, PowerHouse is running a Group Buy and is offering there's for $550 shipped. Here's the link http://s197forum.com/forum/showthrea...466#post384466

I am considering pulling the trigger on one next week!