i found a carbon fiber drive shaft for about $500 from pst.

i currently have the steel that weighs in at 20 lbs and the carbon fiber one weighs 10 lbs ( from what they claim)

what kind of gains should i expect .05-.10?

also wouldn't this be better for my car since its and auto (less strain on internal parts)

I kind of became obsessed with weight reduction due to the fact that its easier on the car and the already weak 4l60e.

Any way car has gone 12.27 @111.03 with a 1.74 60"

im looking to get into the 11's without cracking the motor open, just bolt ons whitch i already have all of them.

since the 12.27 i have removed 50lbs, relocated the battery to the trunk(helps with traction) changed the 2-3 shift point from 6500rpm to 6100rpm to keep it in its power band, and am planning on the carbon fiber ds, lightweight bmr k-member and fiberglass hood over the steel, and when i get the time, clean all the gunk off the inside of the wheels(every little bit helps)

any more advise for little things to do?

 

rwHP gains switching from stock to 1LE (1.1HP, 5 lb-ft):

http://www.ws6.com/mod-1.htm

1LE to ACPT CF (not directly comparible, since he switches to a "coast down" test, but appears he picked up another 1.8HP):

http://www.ws6.com/mod-10.htm

 

they don't last, I would keep a steel one

you will not get a tenth out of a driveshaft

 

Please tell me why you think that they don't last, i thought that they were suppost to be stronger then steel units, not trying to argue with you but have you seen one break. Unless they are hit from the side i believe that they can handle 1,000 hp, after all this is the same stuff the use on the space shuttle.

and i'm really not expecting more than .05 out of this but am more in it for less weight and ease on the drive train. I also plan on more weight mods around another 100lbs is to be taken off the car.

 

Man you have a Performabuilt LEVEL 2 unless I have the wrong person in which case I will feel stupid , We have camaros running low tens and GTO twin turbos running that unit , The Trans is far from weak . The carbon is stronger than aluminum and still weaker than steel many of our fastest cars end up going back to steel .The gains with the alum or carbon are minimal

 

you have the right person, I'm just trying to find ways to have the most reliable daily driven 11 sec car i can possible have. In case you didn't know my last tranny (the one original to the car) failed due to the output shaft snapping in half from the b and m shift kit that i installed. all that this shift kit consisted of was spacers that eliminated the accumulator springs which resulted in a BANG shift, but every since i have had your tranny it as been more of a quick, accurate, firm shift, which i like much more,

maybe i should take everyones advise and just get a good mild cam to dip into the 11's

 

I think thats and excellent idea we have you back on the trans it breaks we will fix it ,

 

each time you launch on a carbon shaft it weakens...it pretty much the same thing as fiber glass. It gets microscopic cracks each time until it finally shreds apart

 

I had a CF DS I loved it, I seriously could feel a difference over the 1LE.

 

I had an ACPT 3.8" super HD CF DS. It broke while the car was being driven from the engine shop to the body shop, with a basic "just-enough-to-keep-it-running" tune in the MoTeC ECU. The front yoke spun loose from the carbon fiber tube. It took me 4 months and a lot of arguing to get my money back from ACPT. I always wonder what would have happened if it broke on the chassis dyno while spraying the 275-shot.......

 

I have seen them fly apart at the track...thats the only good thing....it really does not tear stuff up like a steel shaft. It just desinigrates

 

They aren't all bad. The shop that built my engine had a 7-second Pro5.0 and because of the length of the DS, the only material they could get that would meet the critical frequency with an engine that turned 9,500rpm was CF. After seeing mine, they were extremely wary of using CF, but they got one from Mark Williams, and never had a problem with it.

I don't think the DS is going to affect the load/stress on the engine or the tranny. Once the power leaves the flywheel or the output shaft, that component could care less whether it was absorbed by another driveline component, or ended up at the rear wheels.