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Stronger Rear Axles for 930

I am looking for stronger rear axles for 930 with G50 gearbox.
Is someone out there that can recommend a good manufacturer.
I am using 621hp / 705Nm engine
Thanks
Old 02-06-2009, 01:41 PM
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OMG what a sick cockpit!! love the wheel the F1 display, sequintial box, man thats fantastic , KEEP us update on the progress of this car! and MORE PICS!!!!!!!!!!!!!!!1
Old 02-06-2009, 02:03 PM
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You might try FabCar Engineering. I know of one racer here in Wisconsin that had half shaft and axle stub(the next weak link) issues. They were able to provide solutions to the problem.

fabcar-usa.com
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Old 02-06-2009, 02:09 PM
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I've heard that stock 930 axles are used as the "strongest" on most off-road applications, dune buggies and such. Something to think about, nonetheless.
Old 02-06-2009, 03:33 PM
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Patrick Motorsports stated the carrera items they sold me with a G50 were fine for at least my 500hp but not sure how high.
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Old 02-06-2009, 06:49 PM
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Where did the CF dash come from ???
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Old 02-06-2009, 07:32 PM
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On some of my customers big power Ultima GTR builds and RCR GT40 kit cars I've been using these CV's:

http://www.vwparts.net/MB98-5096-B.html

Lightened chromoly 934 variants. Coupled those with GKN gun drilled chromoly tubular axle shafts.

Those cars are in the 6-800hp range on a regular basis running chevy/ford v8's through G50's or G96's and running big 300+ series tire width in back too.

No issues there, we're breaking gearboxes before breaking halfshafts or CV's
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Old 02-06-2009, 08:02 PM
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Try The Driveshaft Shop- I have heard they made a porsche axle.
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Old 02-06-2009, 08:25 PM
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Looks like the Getty Design dash great project can't wait to see more!
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Old 02-06-2009, 08:26 PM
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Quote:
Originally Posted by crimson ghost View Post
Where did the CF dash come from ???

This dash is from Getty http://gettydesign.com/
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Old 02-07-2009, 11:18 AM
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one more picture

Old 02-07-2009, 11:36 AM
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Old 02-07-2009, 11:39 AM
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934 has different bolt circle – someone told me we could get 31 splines axles and use 930 CV´s (modified)
What I am looking for is some facts about the strength, and axle that will twist under load to take some shock of the gearbox.
Let me know if you can help me out here !
Thanks
Jon
Old 02-07-2009, 11:56 AM
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Quote:
Originally Posted by Hebba911 View Post
934 has different bolt circle – someone told me we could get 31 splines axles and use 930 CV´s (modified)
What I am looking for is some facts about the strength, and axle that will twist under load to take some shock of the gearbox.
Let me know if you can help me out here !
Thanks
Jon
Correct on the spacing.

GKN does offer a variety of gun drilled tubular halfshafts in various lengths, diameters, and spline configurations. they will also make halfshaft per your specifications that will fit the 930 CV.

the 930 CV's are VERY strong. The only time I really ever see them break is under extreme and repeated shock abuse like on the crazy 700hp sand rails.
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Old 02-07-2009, 02:29 PM
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That's a nice car.

Frankly, I sincerely doubt you'll have problems with OEM axles with that sort of power unless you're into drag-racing with drag-slicks on prepped surface. Axles only feel actual wheel-torque and you are most likely never to develop enough torque to snap them while racing. With other words, only time you'll get near chance of snapping them is in the 1:st gear, axle-hopping.
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Last edited by beepbeep; 02-07-2009 at 06:20 PM..
Old 02-07-2009, 06:18 PM
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Quote:
Originally Posted by beepbeep View Post
That's a nice car.

only time you'll get near chance of snapping them is in the 1:st gear, axle-hopping.
+1........ where the axle is under the stresses and chances of the most "wrap up" before physically snapping. The wheel hop induces these in successive order and is where most axle failures will occur. Drag racing with hard launches and off road racing(rally for example) where rapid succession shock loads and twisting are common are going to be the highest fail point cases.

Once the car is moving along a track it's highly unlikely you'll ever subject a failure that not extreme wear related.
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Old 02-07-2009, 08:30 PM
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This car will not be used for drag racing, but I want to be able to test how quick it is.
Before modification it ran 11,63 sec on ¼ - and I was only able to test it twice because I broke axle.
This time it was on lowest boost and computer setting and on 95 octane fuel. (1 bar pressure) – and the car was at that time 1.220 kg.
We have made the car lighter – all body parts out of carbon fiber – plexi glass – no stereo – no sunroof - ….
Our engine is more powerful now (was 594hp to the rear wheel on 117 octane fuel and 1,7 bar) – but the car is lighter. (That will help our axles :-) )
Have in mind you can ruin the gearbox or even break some part of the engine if you snap an axle!!
Old 02-08-2009, 03:31 AM
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Old 02-08-2009, 04:28 AM
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The driveshaft shop quoted me around 2700 for axles in my 1991 964 turbo.
Old 02-08-2009, 12:19 PM
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Quote:
Originally Posted by Hebba911 View Post
This car will not be used for drag racing, but I want to be able to test how quick it is.
Before modification it ran 11,63 sec on ¼ - and I was only able to test it twice because I broke axle.
This time it was on lowest boost and computer setting and on 95 octane fuel. (1 bar pressure) – and the car was at that time 1.220 kg.
We have made the car lighter – all body parts out of carbon fiber – plexi glass – no stereo – no sunroof - ….
Our engine is more powerful now (was 594hp to the rear wheel on 117 octane fuel and 1,7 bar) – but the car is lighter. (That will help our axles :-) )
Have in mind you can ruin the gearbox or even break some part of the engine if you snap an axle!!
Unfortunately, lightening the car won't lower the torque on axles/gearbox, it will only make car accelerate quicker

There are special drag-racing axles made from spring-steel. They can twist a quarter of turn before snapping. Maybe you should have set of these made if you fancy drag-racing.
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Old 02-08-2009, 12:28 PM
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