Saw a post by Guy aka 914GT about using Type I CV's since the 914 specific CV is NLA. So far Guy has not had problems and he is running a 300+ HP V8
So I bought a set of 4 (average price is $40 or so, Eric Shea has them in the resource area)
They are not a 100% bolt on item, they are lacking the 10mm spring pin holes so 2 of the 8.5mm(?) thru holes need to be drilled to a depth of 10mm (.40")
Normally I would use my mill, however I had a job setup on it and I didn't want to re-do my fixtures for that current job so I used my lathe.
Not the prettiest tooling, but it works
1st pic is stock CV with un-mod'd CV on the right, lower CV has 2 holes opened up for the spring pins.
2nd pic is of the fixture, the 2 silver posts are for locating the CV, these are turned down to match the diameter of the thru holes on the CV, then I use a bar to clamp the CV down.
3rd picture shows CV having hole cut.
4th picture shows "step" cut into the CV for the gasket, Guy and others have just used RTV with good results, but I wanted to use the PITA gaskets
the dash marks in black ink are so that I re-install the cage w/balls into the correct CV and at the correct orientation......
Hey cool. Good to see you're keeping busy.
Do the girls sleep to the sound of the lathe now?
That's good, much better than lite sleepers.
Since you have the lathe out, can you turn them for the gasket recess?
good idea!
mike, i guess this is more economical than 944 axles!
they have same internal spline? so you just use the 914 axle?
cool.
That's really cool - nice job dude.
That's it??? Drill some holes and bang in the roll pin. Perfect. When do you go into production?
Price them so that there is money in them Mike. Save the 914 world, the alternatives are not...available!
Did you fill the two remaining holes with silicon so the grease doesnt travel through the pins and out the CV boot cover?
Just a thought: the 914 tranny is a VW part. Did anyone check to see if you could use regular IRS bug output flanges on the a 914 tranny? You would'nt have to go through any of this (at least on one end!)
B
and while you got your lathe all fired up, why not turn down my second axle?
Andy
The 914 CV has a bevel washer that keeps spring tension against the CV when you push it onto the axle. This helps keeps the clip in place on the other side.
Funny part of all this:
Sway A Way makes axles with no clips and no springs. The CV's float on the axles. What are they going to do? Come out of the CV ? No.
B
Here're interesting comparisions between CV joints from various applications:
http://www.blindchickenracing.com/How_to/CVJoints_Axles/cv_joints_101.htm
I measured a brand new 914 axle against these, and it measured 22 degrees of angularity- versus only 12 degrees with the Type 1. I guess that doesn't matter, since these are working well for you. Note that the Type 4 (by which this guy means 924 and 944) also has 22 degrees, but with the 100mm diameter- too big. And the only one with more is the 930 CV at 25 degrees (108mm).
Interesting. When I get a minute later tonight, I'll lookup my other measurements of the 914 CV and post them.
The 914 tranny a VW unit????? That's the first I heard that!
Jim
It says VW all over it. It is not much different than the T1 bug box. I have been involved with several Hewland/914 boxes in the past. The input shaft and pinion shaft are on the same measurements as the T1 IRS tranny/Hewland. We use Hewland gear sets.
B
The 914 tranny case has the bosses on it in the bottom of the bellhousing for the BUG mounts to the frame horns. Drill and mount.
B
Something else to consider when using the Type I CVs, there are units available that have been heat treated and deburred for further strength and life. These are the ones I have been running in my V8 Type III for years(including many dragstrip passes). When I repurchased my old car I replaced all the joints, just to be safe. I knew the POs had broken some of the CVs from misuse( one was broken by the upholsterer getting the car in and out of the building ). Just something else to consider when adapting Type I CVs. The "Blind Chicken " site has lotsa useful info.Dad
Attached image(s)
Hey Mueller,
I ended up doing that same thing one panicked Saturday morning before a race in Oregon (that was back when I lived in Kalifornia) after calling a dozzen parts houses and wreckers. Many thanks to the parts guy who suggested that the splines were the same. But I did it in the back of the Stretch, in the parts house parking lot (just in case I F** up and needed another) with a Makita drill and a rag to keep the shavings out of the joint. Still worked great until I fragged the transaxle.
Can you say 30 minutes until the track opens? Sure, I knew you could.
Have fun!
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