[DeTomaso] Tapered ring compressor
Will Kooiman
will.kooiman at gmail.com
Thu Jul 6 06:19:38 EDT 2017
On mine, the half shaft is not a tube. It¹s a solid piece of 1.25²
diameter bar.
It looks like this image: http://dazecars.com/dazed/halfshaft.jpg
Mine is not welded. It looks like it is a solid forging.
The U-Joints were intact. Only the bar was twisted.
I¹ve seen pictures of a twisted tube axle from a Cobra that had been drag
racing with a high-HP engine and slicks. Ugly outcome. I only saw the
axle picture. There wasn¹t a picture of a wrecked car, so maybe he shut
it down before crashing.
Incidentally, a solid axle is not much stronger than a tube of the same
diameter. But, a tube wrinkles when it fails where a solid axle would
just twist until it finally twists too far, and then it should snap.
On 7/5/17, 12:02 PM, "DeTomaso on behalf of Mike Drew via DeTomaso"
<detomaso-bounces at server.detomasolist.com on behalf of
detomaso at server.detomasolist.com> wrote:
> It's the actual tube that twists about 90 degrees....
>
> Mike
> Sent from my iPad
>
> On Jul 5, 2017, at 08:55, Ken Green <[1]kenn_green at yahoo.com> wrote:
>
> Do you mean the U-joints very slightly twist or the half shafts? I can
> imaging a solid axle twisting a little without breaking, but it's hard
> to imagine a tubular axel twisting without being compromised?
> Ken
> __________________________________________________________________
>
> From: Mike Drew via DeTomaso <[2]detomaso at server.detomasolist.com>
> To: Will Kooiman <[3]will.kooiman at gmail.com>
> Cc: [4]detomaso at detomasolist.com
> Sent: Tuesday, July 4, 2017 9:42 PM
> Subject: Re: [DeTomaso] Tapered ring compressor
> Fwiw Dennis Quella told me a story years ago. He builds ZF gearboxes
> for owners of Wells Coyote hill climb cars for Pikes Peak. He told me
> they use stock Pantera driveshafts, and they twist under all the power,
> so after they twist they flip them side to side, and the next run
> un-twists them!
> Mike
> Sent from my iPad
> > On Jul 4, 2017, at 21:30, Will Kooiman <[5]will.kooiman at gmail.com>
> wrote:
> >
> > Jack - my Cobra halfshafts are not cut and re-welded. They appear to
> be
> > forged. They are solid, 1.25". They have the original Jag part
> numbers,
> > and I even found some on ebay less than 10 miles from my house. But
> I
> > don't want to replace the half-shafts with another pair that will
> also
> > twist.
> >
> > BTW, it doesn't shake, shimmy, or do anything weird, even with the
> shaft
> > twisted a bit. It's currently smooth as butter.
> >
> > As I understand it, it is pretty common for drag racers to twist
> axles. I
> > don't know if they still do it these days with super strong axles,
> but I
> > heard they used to paint a line down the axles so they could see how
> far
> > they had twisted. I don't have to do that, since each end has a
> U-joint
> > that doesn't move, so it's pretty obvious when they twist.
> >
> > I plan on having half shafts made in 2.5" tube. That's about as big
> as I
> > can go w/out moving the springs out. But that's a project in the
> future.
> > I have a few others in front of it.
> >
> >> On 7/2/17, 9:11 AM, "Joseph F. Byrd, Jr." <[6]byrdjf at embarqmail.com>
> wrote:
> >>
> >> My Lord!
> >>
> >> Is that something that happens with Jag half shafts?
> >>
> >> I would think you should also be feeling a weird vibration, not only
> from
> >> the expectation the twist threw the shaft out of balance, But more
> so from
> >> the u joints being out of phase. I wonder if that might be
> >> pushing/pulling
> >> once per revolution on the bearings and the seal was the FIRST to
> suffer.
> >>
> >> -----Original Message-----
> >> From: DeTomaso [mailto:[7]detomaso-bounces at server.detomasolist.com]
> On Behalf
> >> Of Will Kooiman
> >> Sent: Sunday, July 02, 2017 1:21 AM
> >> To: Ken Green; Thomas Toernblom
> >> Cc: Detomaso Email List
> >> Subject: Re: [DeTomaso] Tapered ring compressor
> >>
> >> ...The squealing was the seal race....and was rotating where it
> wasn^1t
> >> supposed to rotate.
> >>
> >> ...the half shafts had twisted about 30 degrees....
> >>
> >>
> >
> >
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>References
>
> 1. mailto:kenn_green at yahoo.com
> 2. mailto:detomaso at server.detomasolist.com
> 3. mailto:will.kooiman at gmail.com
> 4. mailto:detomaso at detomasolist.com
> 5. mailto:will.kooiman at gmail.com
> 6. mailto:byrdjf at embarqmail.com
> 7. mailto:detomaso-bounces at server.detomasolist.com
> 8. mailto:DeTomaso at server.detomasolist.com
> 9. http://server.detomasolist.com/mailman/listinfo/detomaso
> 10. mailto:DeTomaso at server.detomasolist.com
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