Mythbuster: continuing project thread of my 1303 '75

[Steve Arndt]

Are you using regular 930, or the big boy 934/935?

The time I bought Lobro 930s they were $55 per joint. That was a few years ago...

Steve

[Wally]

Originally Posted by Steve Arndt

Are you using regular 930, or the big boy 934/935?

The time I bought Lobro 930s they were $55 per joint. That was a few years ago...

Steve

Hmm, interesting as I didn't even know there were two types of 930 CV's?
All I know are the 108mm outside diameter "930" Porsche CV's, which is the size some/most 915 transmissions already have and is also standard size for all G50's.

However...I have converted to Richards/Steve's idea and fitted the 100mm flanges from the front 964 diffs and still used my beloved T2/T25 100mm VW CV's and axles.
So, these Lobro's were over 110 euro's each, even with my discount at the parts store...
Thats why I only bought two, not four
Just swapping out the outers now before engine goes in, so much more easy.

[Steve Arndt]

934 CV on left - 930 CV on right. 930 are big compare to T2. 934 are HUGE.

http://www.duneguide.com/sand_dune_tech_cv101.htm

[Wally]

Pity it doesn;t show dimensions of the CV outer diameters, but the read on assembling was good. I learned something new anyways, thanks!

[owdlvr]

Here is a link the the GKN catalog. http://www.rowland2.com/pdfs/cvdisc.pdf

I believe 930's are size 15 CV's and 934 are size 21. They have both plunging and fixed in this catalog.

-Dave

[Wally]

Originally Posted by owdlvr

Here is a link the the GKN catalog. http://www.rowland2.com/pdfs/cvdisc.pdf

I believe 930's are size 15 CV's and 934 are size 21. They have both plunging and fixed in this catalog.

-Dave

Interesting! I see that T2 CV's are type 13 there and 100mm (99,7) OD.
930 is then type 15 with 108mm
934 would be type 21 and is 128mm (!)

The weight difference:
T2 : 1,4 kg
930: 1,8 kg
934: 3 kg (!!)

If I can keep the T2 CV's in one piece (and assuming we use type 174 in that catalog), that alone saves me almost 0,5 kg unsprung weight per wheel and almost 2kg total weight for the 4 of them.
Not to mention what you would drag along with 934 CV's...

These things add up fast.

[Steve Arndt]

I missed the details Wally. How are you running 930 and T2 on the same axle? The splines are different. I inquired years ago to Sway A Way if they would build me a set like that and they said no way.

[Wally]

Originally Posted by Steve Arndt

I missed the details Wally. How are you running 930 and T2 on the same axle? The splines are different. I inquired years ago to Sway A Way if they would build me a set like that and they said no way.

I don't.. I run the front 964 flanges which have 100mm CV size and fit the G50 as a glove. So I still run 100mm on both sides, just with the simple VW spline.
The axles and CV's are still exactly the same as I ran them on the 915

[Wally]

Engine finally in after I was able to lend a 930/G50 shaft to align the dual plates..

FYI, type 1, 915 and 930/G50 splines next to each other...Guess which is strongest

[Wally]

I hear you mate..
Curieus to your engine! Just mail the pics to me and I'll upload then for you. I'll send you a PM with my email.
Greets,
Walter

PS I just installed the last bits of my rebuild engine. Hope to start it tomorrow evening and have it running this weekend.
I'll try to take some pics tomorrow as well.

[70Turbobug]

Wally, your G50 is the smallest of the G50´s correct? As far as outside dimensions.Which one is it exactly? Hope you get back on the road this weekend!

[Wally]

Originally Posted by 70Turbobug

Wally, your G50 is the smallest of the G50´s correct? As far as outside dimensions.Which one is it exactly?

Smallest may not be the correct term here, it only has the short nose cone. Thats it. All two-wheel drive G50's have the same dimensions, except the turbo-G50's which have an even bigger crown ring.
Mine is a G50/01 ('88). The G50/00 ('87) also have the short nose cone. After that ('90 ->), the longer nose cones came into production.
As you may remember, I also had the bellhousing shortenend. Every little bit helps

[70Turbobug]

Thanks for the info! Looking good! A new bov also? Can't wait for the next track video!
I'll see you in Spa!

[NO_H2O]

Getting close. Can't wait to see the next video.

[dub_crazee]

looks great - whens the next dyno day?