Heavy Duty Rear CV's - worth it?

[syncroand101]

Hi All,

Just stocking up to replace all my rear CV's, preventative maintenance if you like, most of them are pretty worn and there is play.

There are heavy duty rears available giving more arctic (23 over 17 on brickwerks info). Has anyone fitted these, or broken any? I have never had a problem with the standard ones, providing they are in good nick and bolts checked regularly, they seem to put up with pretty good abuse.. are they worth the extra expense?

Ta

[lloydy]

Syncro services told me that if I went above 30mm I would need HD cv joints. I think they are 944 turbo joints. So could maybe get them cheaper elsewhere?

[KINGPRAWN]

i've looked around as going 20mm spacers i've developed a knock that i'm positive has only started since the lift(rear end). with the brick discount they're £50 havent found anything cheaper that is guaranteed correct!!....but....he aint got none!!! so paid but waiting poss 2 weeks......

[syncroand101]

Interesting, as I have been running Seikels on my vans for about 8+ years now, even including extra spacers at the back, not yet had a problem - and it is pretty well travelled and used (abused).

I seem to recall Dai having the HD ones at Syncropendance a few years ago and snapping them on the rock climb - could be wrong though, may have been normal ones?

[KINGPRAWN]

don't know if i needed to go h/d or just replace but for the sake of a few quid i always go h/d if there is an option...belt n braces!!!

[toomanytoys]

I have them on mine (from Bricky).. with Brickys longer AVO shocks too.. and TD spacers.. no issues so far... done quite a few long runs and plenty of offroading..
I used some slightly longer cap head screws too.. (I purchased a box of them so have a good few left.. ) I just wanted to test the bolts before offering them...

[KINGPRAWN]

I have them on mine (from Bricky).. with Brickys longer AVO shocks too.. and TD spacers.. no issues so far... done quite a few long runs and plenty of offroading..
I used some slightly longer cap head screws too.. (I purchased a box of them so have a good few left.. ) I just wanted to test the bolts before offering them...

does this mean my origional screws wont be long enough???

[toomanytoys]

IIRC the std bolts are 48mm, I used 50mm ones (or am I thinking the rears are 50 and the fronts are 52??) and although it was ages ago (so I cant remember), I thought the HD CV's were 2mm thicker.. I cant remember exactly... (combination of old age and too many beers have pickled and destroyed the brain cells )

I'm sure someone will correct me....

The bolts I managed to get are much better quality than the normal ones in boot kits etc...

[ericos_bob]

I had the "heavy duty" porsche 944 cvs on my syncro and they only lasted me around 1000kms before they were completely worn. I don't understand how they achieve more angle over stock having smaller ball bearings. One thing I do know is that lifting a syncro is relative to the weight of the car. If you lift a syncro camper 2" you may simply bring the ride height back to that of a stock empty panel van in which case you don't need high angle cv joints. Basically 21" (or there abouts) is the maximum ride height porsche 930 cvs can cope with which is what I run on the rear now. I've gone back to stock cvs on the front as I don't trust the longevity of the small bearing 944cvs.

[syncropaddy]

One thing I do know is that lifting a syncro is relative to the weight of the car. If you lift a syncro camper 2" you may simply bring the ride height back to that of a stock empty panel van in which case you don't need high angle cv joints.

I reckon you have a point there. I have an empty van on original springs with almost 250,000 miles up and the ride height (wheel centre to wheel arch) is not a whole lot down on my Multivan with a 2" lift at 510mm to 530mm



I have never seen these HD CV joints but have heard about the extra few degrees on inclination and was considering buying them. Not too impressed with 1000kms life ......

[Simon Baxter]

I had the "heavy duty" porsche 944 cvs on my syncro and they only lasted me around 1000kms before they were completely worn. I don't understand how they achieve more angle over stock having smaller ball bearings. One thing I do know is that lifting a syncro is relative to the weight of the car. If you lift a syncro camper 2" you may simply bring the ride height back to that of a stock empty panel van in which case you don't need high angle cv joints. Basically 21" (or there abouts) is the maximum ride height porsche 930 cvs can cope with which is what I run on the rear now. I've gone back to stock cvs on the front as I don't trust the longevity of the small bearing 944cvs.

What brand were they? Interparts again?
I hope you sent them back if they only lasted 1000 km's.
They achieve more angle by being deeper.

[Simon Baxter]

The Porsche joints also have a black hardened finish, unlike the standard items.

[toomanytoys]

mine have done much more than 1000km (its 1k km each way to french place...) and no issues... I'll do a check this weekend as engine and box are out...