How much does this exactly do for you as far as performance as concerned?

Does this give you more rwhp due to greater efficiency and less rotating weight?

Also, what is the aproximate cost of the part and how difficult is the install?

 

Well....accoding to GranTurismo.....there is no horsepower gain....but I would assume it frees up more rear wheel power beacuse of there being less weight in the drivetrain...

 

Simplified formula for you to consider:

100 lbs. of static (non-rotating) mass removed from car = .1 in the 1/4 mile.

10 Lbs. of rotating mass (wheels, brakes, driveshaft, flywheel, etc) removed from same car = .1 in the quarter mile.

Also, braking, cornering, and overall nimbleness of the car are improved with reduced rotating mass, and reduced static mass.

I guess the real question is who's doing it, and is it a one-piece for lowered cars, or a two piece for the stock height setup?

 

PowerHouse 4" Aluminum here (one piece). Car's acceleration improved for sure in my view.

very easy install.

 

No HP gain at the engine. Your assume correctly, it frees up more rear wheel HP. So do super light wheels.
http://powerhouse411.com/catalog/ind...products_id=68

 

Check this out:
http://forums.bradbarnett.net/showthread.php?t=56154

 

Yes, exactly - there is less parasitic loss of power in the drivetrain, hence more of the engine's available horsepower can be put to the ground. Any loss of rotating mass reduces inertia, and the parasitic loss to turn it.

 

I've had the Powerhouse aluminum shaft in for about 4-5 months now. They had them in stock. Arrived in about a week. Relatively easy install. Good quality piece. No vibrations. A little pricey, but I think it's worth it. Weighs about half as much as the stock shaft. And I agree, less mass means it's easier to spin up.

 

when i made mine last year i didn't expect too much gain but i was pleasantly surprised when my car picked up a solid .20 second 1/4 mile. also throttle response was quicker(in gear). i think $700 is outrageous thats why i started doing the ranger shaft conversions. unfortunately i let the secret out and now we can't find any new ranger shafts anymore. powerhouse makes a great piece and it is a bolt in deal. my book it's worth $500 but maybe not $700 unless your just maxed out on everything else.

 

Go to MMFF's website and they have a S197 GT related article on the homepage. The manual car they tested saw a .2 reduction in elapsed time using JPC's Aluminum DS.

 

It's been a while since I read it BUT I think it was a Chrome Moly shaft (steel). Please correct me here if I remembered wrong....

 

When I had mine installed, I had a 10 rwhp gain and a 15 rwtq gain (accross the power range - not peak). However, I remvoed mine due to vibrations, but others have not had any issues.

-Bryan

 

Silver **** you mentioned a one vs two piece, can you speak a little more on this please?

 

I haven't read it in a while either, but thought it was aluminum. Either way, the results are there for a lightweight DS.

 

the stock steel driveshaft is consideed to be a two piece shaft while the aftermarket and ranger type shafts are called one piece. the one piece term is kind of misleading since the shafts have a slip joint in them thus it actually makes them two piece shafts but it's too confusing so we just call them one piece vs. two piece.
i don't know the weight of the JPC CM shaft but their aluminum one is about 17-18lbs. my converted ranger shafts are 16.5 lbs. stock shaft weighs over 40lbs!!

 

Spyder is right on all counts.

 

Are the one piece an issue on lowered cars?

 

I have heard that the driveshaft/pinion angle must be adjusted on on lowered cars (with adjustable UCA or LCA's). I hope not, though.

Does the one piece driveshaft completely eliminate the "clunking" slop that we have with the standard set-up, or is it just an improvement over the stock set-up?

 

I have been running mine for about 6 months now and have noticed zero negative effects. I can also verify the shaft is worth about 2 tenths in the quarter. My car is lowered 3/4" in the rear and I had a 0 degree pinion angle. A Steeda adjustable upper control arm fixed that.

 

it can be if you have stock LCA,UCA's and are lowered more than 1.5". i did have a rub when i set my car down in the weeds. i got a good UCA and raised the car up a little. as you can see it's still low.