Any1 heard of the JPC Racing ALum 1 pc driveshaft? I was reading about it in FF & MM. Sounds just as good as Powerhouse. Unfortunately it's just as expensive.
I haven't heard anything good or bad with JPC D/S. Do a lot of checking around before you get one. At least we know the Powerhouse D/S is a good one.
Weight is the key. Unsprung weight / rotational weight is where some HP is lost from the crank to the wheels. The stocker runs out at 47lbs while the aluminum runs out at only 17lbs. That is 30lbs of weight reduction in rotational mass. Also, the single piece should reduce the "clunking" sound that we all love so much.
Yes, well, maybe. I would sure like to read some more on this. Do you know of any published materials that are not advertisements, such as dyno results, that discuss the benefits fo a lightened driveshaft?
I just don't see how changing one rotating body for another (that does not present any appreciable difference in frictional or aerodynamic drag, regardless of its weight) will increase horsepower, especially at the output end of the transmission.
I can believe that time vs engine RPM (how fast you can rev) is reduced, and how this might affect acceleration in the lower gears, but I don't see how a driveshaft can increase actual, steady horsepower at the rear wheels.
A lightened flywheel might change horsepower output on an 8 cylinder, because a lightened flywheel might affect the power pulse-to-flywheel relationship in a positive way, thereby increasing the efficiency of the engine. Maybe a lightened driveshaft can serve the same purpose in the lower gears- kind of like the same effect as a lightened flywheel?
Do you know where the dyno results for a drive shaft swap? I would really like to see them.
Yes, well, maybe. I would sure like to read some more on this. Do you know of any published materials that are not advertisements, such as dyno results, that discuss the benefits fo a lightened driveshaft?
I just don't see how changing one rotating body for another (that does not present any appreciable difference in frictional or aerodynamic drag, regardless of its weight) will increase horsepower, especially at the output end of the transmission.
I can believe that time vs engine RPM (how fast you can rev) is reduced, and how this might affect acceleration in the lower gears, but I don't see how a driveshaft can increase actual, steady horsepower at the rear wheels.
A lightened flywheel might change horsepower output on an 8 cylinder, because a lightened flywheel might affect the power pulse-to-flywheel relationship in a positive way, thereby increasing the efficiency of the engine. Maybe a lightened driveshaft can serve the same purpose in the lower gears- kind of like the same effect as a lightened flywheel?
Do you know where the dyno results for a drive shaft swap? I would really like to see them.
Dyno will not reflect drivability and track results. Many times I see someone care a lot about a dyno and HP when more things play into low ET.s One important thing is weight reduction..and when you reduce rotational mass you'll improve the ET. Take a look at the current MM&FF's magazine. They got .2 tenths lower ET with just swapping out the driveshaft to a one piece lighter chrome moly one. (I have my copy at work so I am going from memory). I bought a PowerHouse Aluminum driveshaft and I "know" my car will be faster for it. I expect it to have the SAME dyno HP.
Dyno will not reflect drivability and track results. Many times I see someone care a lot about a dyno and HP when more things play into low ET.s One important thing is weight reduction..and when you reduce rotational mass you'll improve the ET. Take a look at the current MM&FF's magazine. They got .2 tenths lower ET with just swapping out the driveshaft to a one piece lighter chrome moly one. (I have my copy at work so I am going from memory). I bought a PowerHouse Aluminum driveshaft and I "know" my car will be faster for it. I expect it to have the SAME dyno HP.
AGREED. I can see how this would affect (improve) acceleration, and ultimately ET times. I definately have no problem with that.
I was just trying to get a little clarity on the issue, since some have been posting that there are actual horsepower gains. You don't always need more horsepower to go faster, right?
Ford Racing has them for previous generation Mustangs at half the cost of the aftermarket ones. Lets hope they decide to produce one for the S197.
It amazes me how much the prices for certain things get jacked up once they become popular. I bought my Ford aluminum drive shaft before the trend really took off and paid less then $200 for it, I just checked the price again to see what theyre up to and now theyre asking for 229.00 for the same piece!
