CANT FIND : Flanges for a 930 trans that accept Lobro 934 CV's?

[doozer]

Do you know who offers flanges for a 930 trans that are designed to accept Lobro 934 CV's?

I cant seem to find these and I dont want to make them..

Thanks Todd

[Lukesportsman]

Look into the Sand rail guys. Mendeola or Rancho might be able to help.

[doozer]

Thanks Luke.

I just dont want to have to CNC and heat treat a pair if I dont have to..

[beepbeep]

Very interesting project!

Sorry for not answering your question, but what's wrong with 930 CV's? They are very tought to break...i know only one person who suceeded but he has 800hp+ engine and G50 tranny with low-geared first gear, doing clutch-dumps with drag-slicks on glued strip.

I don't believe you'll ever be able to develop enough at-wheel torque with your 930 tranny to destroy 930 CV's, even if you have monster V8-engine. It will probably just spin the wheels.

Regards.

[doozer]

1. Looking for longer term reliability.
2. I plan to groove cooling fins in them on the CNC so I need some extra thickness.
3. Everyone has got 930 cv's
4. 934 CV's are bad a$$ because they have 1" balls

I saw your conversion, VERY COOL!!

[beepbeep]

I have now read more about your conversion.

If I was you I would sell those hard-to-find CV's and use absolutely easies way of solving you axle-problems: I would use Carrera axles.

They are cheap, have no outer CV-bolts (as outer CV is integrated with spindle) and bolt straight-on to 930 tranny (having 109mm CV-diameter). Length is perfect too, as 930 diff is only 5mm wider than 915 one.

Using 930 or, for that matter, 934 CV's will force you into manufacturing custom axles (as 930 axles are too short), custom spindles (as SC spindles accept only 100mm CV's, Carrera spindles are integrated with outer CV's and 930 spindles use dual bearings and won't fit into your hub), and custom gearbox flanges (if using 934 CV's).

Lot's of work and $$$ for nothing, if you ask me. A pair of Carrera axles costs around 530$, plug-and-play.

Your little experiment with custom everything is going to cost a lot more and I seriously doubt you'll gain so much long term reliability.

[doozer]

Thanks for the good input!

I have a set of 84 911 Carrera axles with new CV's but there are bolts at both ends ( trans flange and stub )?

Which axles are you referring to?

I have already eaten a set of ( new lobro ) 84 Carrera CV's, actually broke the cage and cracked the inner fusing it into a hunk of junk.

This is why I wanted to go with the stouter CV's - so I just dont have to worry about it any more..

[beepbeep]

Originally posted by doozer
Thanks for the good input!

I have a set of 84 911 Carrera axles with new CV's but there are bolts at both ends ( trans flange and stub )?

Which axles are you referring to?

I have already eaten a set of ( new lobro ) 84 Carrera CV's, actually broke the cage and cracked the inner fusing it into a hunk of junk.

This is why I wanted to go with the stouter CV's - so I just dont have to worry about it any more..

It cannot be a Carrera axle, It's probably just ordinary SC axle. Carreras appeared 1985 and had bigger diameter CV's (108mm instead of 100mm) with outer CV and stub fused together. They are sturdier than SC axles, and cheaper to boot.

This is how they look like:



930 CV's have 108mm diameter too, so Carrera axles are bolt-on. Reason I know this is that we also have 930 tranny and SC sway arms, so I had to research this issue torroughly.

Using 934 CV's just beacuse "they are cool" and doing CNC-machining to get "cooling fins" (cooling from what?) sounds ... well ... unnecessary to say the least.

[Wayne 962]

Don't forget 934 CVs are built to handle power, but aren't built for longevity. These are race cars whose parts are designed for lives that are measured in hours, not years. I would go with production parts...

-Wayne

[doozer]

Thanks Goran! Mine was a mid 84 so it was before the axle upgrade. The Carrera axles look good and I will keep them as an option.

I have just spoken to A LOT of people this week who connect 930 trans to small block and big block V8's and run them on a daily basis and they say that the only CV's that last more than a few months are the 934's

From what I am hearing the same is said for the life span of the chrome-molly 934 CV. The non chrome-molly version is good for a race life where it will get replaced on a regular basis. The chrome-molly version is actually supposed to last for a very long time...

Thanks for all of the good information!!

Thanks
Todd

[doozer]

Goran, what years were those axels made????

[ChrisBennet]

The '84-80 Carrera had 2 flavors of axles over it's lifetime.
The change happened in 1985 1/2 according to the tech doc I read.
The early ones had 8mm bolts with seperate CV's on the outside - probably the same as SC's but I'm not sure.
-Chris

[beepbeep]

According to my info, "fused together" Carrera axles were fitted on Carreras from August 1983 to August 1989 on ROW cars.

They are pre-assembled, don't have any CV bolts on outer CV's that need to be torqued/retorqued, they are allready lubed (no greasy fingers anymore) and have same diameter as 930 CV's. Plug and play baby...best of all, they are cheaper than SC axles.

Talking about CV breaking and such:

CV's are dimensioned to withstand certain torque. That torque is highest when pulling from dead-stop, presumably while dumping the clutch equipped with sticky tires.

For each new gear you select, torque is going to be less and less multiplied, as wheels will rotate faster (power transmitted to wheels will still be the same as power = RPM x torque).

With other words, if your CV's survive pulling of the redlight they will certainly survive high-speed driving. Now 930 transmission has laughably high 1:st gear, so even if your engine develops 1000Nm, it will load the CV's with something similar to SC fitted with 930 engine with stock 915 tranny.

If not fitted with very fat rubber and on sticky surface, chances are your wheel traction won't be enough to transmit all that torque and you'll just spin the wheels.

I would wait with 934 CV's and all those pricey custom gadgets until you break your first CV...if you do, well those axles only cost you 250$, right?