[DeTomaso] Advantages of CV Half Shafts?

[Mike Drew]

All,

Another thought—the weight savings of Scott’s setup is much greater than I suggested originally, because it fails to account for the weight of the parts that are removed.  

The stock hub/axle flange alone is 1 lb 13 oz. I don’t know the weight of the stock inboard ZF flange but it is probably more like 3 lbs.

So the weight differential between stock and SACC driveshafts is quite substantial.  About 23 lbs vs 13 lbs 6 oz.

They are looking better by the minute!

Mike

Sent from my iPad

> On Dec 26, 2019, at 19:02, Mike Drew via DeTomaso <detomaso at server.detomasolist.com> wrote:
> 
> Mike,
> 
> If you get the kind that require adapters to bolt them to the ZF and hub flanges, they are just as heavy as stock driveshafts, if not heavier.  If you get the kind that require different gearbox flanges, you have to partially dismantle the gearbox to fit them, but it saves a small amount of weight. 
> 
> I actually have a set of those latter style from SACC restoration sitting here, along with stock driveshafts, and a postal scale. Perhaps I should get off my butt, no? :)
> 
> Stock:  18 lbs 13 oz
> 
> SACC CV:  13 lbs 6 oz
> 
> CV joints are smoother than Hooke-style U-joints. They can also tolerate greater articulation, although that isn’t a factor unless you choose to reposition the gearbox (say, by moving it rearward to accommodate a longer 460-based engine).
> 
> If I had no driveshafts at all, it would be difficult to justify $2300-2500 for CV vs $500-750 for stock-style. If I already had the stock ones and there wasn’t anything wrong with them, $2300-2500 seems very unnecessary. Having said that, I suspect they are capable of withstanding more power, so if I had 600-700 hp I might consider them a necessity. And, they are probably smoother going down the road. 
> 
> I do think for 99% of us, it falls into the category of recreational spending. 
> 
> Mike
> 
> Sent from my iPad
> 
>> On Dec 26, 2019, at 15:38, Mike & Elizabeth Thomas <mbefthomas at comcast.net> wrote:
>> 
>>    One of the mods I'm considering for my restoration is a swap to CV half
>>  shafts.  The prices have come down over the last few years.  What does
>>  the group see as the advantages of these axles v/v u-joint half shafts,
>>  besides weight.
>> 
>> 
>>  Thanks
>> 
>>  Mike Thomas
>> 
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