drivetrain problems w/ v8, driveshafts and cv joint problems Options

[army dude]

I have gathered a nice collection of pics and saw a picture from underneath the car looking at the tranny and shafts. I know the drivetrain has been pushed bach an inch and a half but the shafts look like they really are angled badly. What problems arise cause of this and what can I do to strengthen the shafts or cv's? Upgrades?
Thanks!
Ian in Iraq

54 days till stateside
59 till I drive

[wbergtho]

Hi Ian,

I have a 930 box attached to a 500HP LS6. I use stock 1973 (early 911) driveshafts...I'm told they are stronger than saya 86 911 driveshaft. Maybe the other guys have more info on this. All I can say is that my 1973 driveshafts are holding up fine with 475 ft lbs of tq. I had some spacers machined up to fill in the gap although I should have just taken an old pair C/V apart and used the C/V hub as a spacer. They are the perfect width.

As far as gearing goes for the 930, you'll be plenty happy w/ the stock ratios. With 25" tires...running 7000 RPM...in a vacuum...you'd be hauling ass @ 197 MPH! So I think you won't have to regear it with taller gears. You'd spend a small fortune regearing one of these boxes. Here's the math... 1987 930 4 speed STD 4th gear ratio = .625 STD final drive ratio = 4.222 Ring & pinion = 9:38 Equation... RPM X tire diameter X 0.002975 divided by gear ratio X final drive = MPH So determining top speed in 4th gear @ 7,000 RPM w/ 25" tires is as follows: 7000RPM X 25" X 0.002975 DIVIDED by .625 X 4.222 = 197.29 MPH. The gear ratios are so great for V-8 use...check this out. The following speeds will be attained @ 7,000 RPM w/ 25" tires. 1st = 56 MPH, 2nd = 97 MPH, 3rd = 141 MPH, 4th = 197 MPH. Of course if your engine only spins to 6,500 RPM everything slows down a bit. You're still going to be very fast. (IMG:http://www.914world.com/bbs2/html/emoticons/aktion035.gif)

Bill