[DeTomaso] Tapered ring compressor

Will Kooiman will.kooiman at gmail.com
Sun Jul 2 01:21:23 EDT 2017 

By the way, I checked today and the rings are 1.5mm, not 1mm.

And I¹m still using the wooden end of a hammer to install, but it¹s just a
light tapping.  It¹s so light that I thought I could just push them in,
but it isn¹t quite that light.

One more interesting note.  I drove the Cobra to Arkansas last
Thanksgiving.  Round trip was about 3,500 miles.  The back right starting
squealing kinda weird off and on as I made it back to Miami.  It would
only squeal for a few seconds.  It started squealing more often about a
month ago, so I took the rear-end apart to replace everything that wears.
It¹s a Jag rear-end, similar to a Pantera, except that there is only a
lower control arm.  The upper is located by the half shafts.  The
squealing was the seal race.  There¹s a race that fits against the hub to
allow the grease seal to seal.  It had dried out a bit, and was rotating
where it wasn¹t supposed to rotate.

As I got it apart, I noticed that the half shafts had twisted about 30
degrees.  Apparently the 428 has more torque than the Jag it was designed
for.  While I was in Arkansas, I ran down the strip 2 times, so that¹s
probably what did it.  I put it back together, twisted and all.  This is
currently my daily driver (rain permitting), so I¹ll drive it sanely while
I have some half shafts built.



On 7/1/17, 12:14 PM, "DeTomaso on behalf of Ken Green via DeTomaso"
<detomaso-bounces at server.detomasolist.com on behalf of
detomaso at server.detomasolist.com> wrote:

>   Does anyone make a ring compressor with a tapered overlap and lever to
>   close it over the rings?
>   Ken
>     __________________________________________________________________
>
>   From: Thomas TAP:rnblom <tipo874 at gmail.com>
>   To: Thomas TAP:rnblom <tipo874 at gmail.com>
>   Cc: Detomaso Email List <detomaso at detomasolist.com>
>   Sent: Saturday, July 1, 2017 5:12 AM
>   Subject: Re: [DeTomaso] Tapered ring compressor
>     I should have said that it has a slit, not that it is sliced.
>     [1][1]https://m.summitracing.com/parts/sme-90a3900
>     1 juli 2017 kl. 09:02 skrev Thomas Toernblom
>   <[2][2]tipo874 at gmail.com>:
>     I have two of these fixed size compressors, 4" and 4.030 but had to
>   get
>     another one for my new 4.040 pistons. This time I bought an
>   adjustable
>     compressor. It looks just like the other ones but it is sliced and
>   has
>     a big hose clamp around it to set the size. I haven't tested it yet
>   but
>     I hope it will work just as well as the other ones.
>     Thomas
>       1 juli 2017 kl. 02:31 skrev Will Kooiman
>       <[3][3]will.kooiman at gmail.com>:
>         Hi Guys,
>         I am slowly putting together a 427FE engine for my Cobra.  I'm
>       taking
>         my time because the 428 that's currently in the Cobra is running
>       great.
>         At any rate, my ring compressor was giving me fits.  I have a
>       fairly
>         nice, old school, ring compressor that consists of several bands
>       and a
>         pair of special pliers that compress the bands.  The pliers have
>   a
>         catch.  You squeeze it, pop the piston in place, and then release
>       the
>         catch.  Pretty simple.  Only it doesn't actually work that well.
>         So, I bought one of those tapered ring compressors.  Holy crap
>   this
>       is
>         easy.  The piston slides in so smoothly, you don't even have to
>   tap
>       it
>         with a piece of wood (bottom of a hammer).  You can just push the
>         piston in the hole.
>         Never, ever use any other tool to install pistons.  You have to
>   buy
>       one
>         for each bore size, but how many bore sizes do we really use
>       anyway?
>         I'm also using really thin, standard tension rings.  If I recall
>         correctly, they're only 1mm.  I'll check tomorrow.
>         Btw, it's actually going to be a 482.  I had to buy a crankshaft,
>       so I
>         bought new.  It's cheaper to buy a stroker crank than it is to
>   buy
>       an
>         original stroke.  An original stroke crank is also special order.
>         Plus, the CR math works out that a flat top gives me 10-1
>       compression
>         as a 482.  If I stayed with a 427, I would have to use pop-ups.
>         I'm still working on the Pantera.  I just thought you'd
>   appreciate
>       this
>         public service announcement.  Jack - you should do an article on
>       these.
>         Will.
>       _______________________________________________
>       Detomaso Email List is not managed by POCA
>       Posted emails must not exceed 1.5 Megabytes
>       DeTomaso mailing list
>       [4][4]DeTomaso at server.detomasolist.com
>       [5][5]http://server.detomasolist.com/mailman/listinfo/detomaso
>       To manage your subscription (change email address, unsubscribe,
>       etc.) use the links above.
>       Members who post to this list grant license to the list to forward
>       any message posted here to all past, current, or future members of
>       the list. They also grant the list owner permission to maintain an
>       archive or approve the archiving of list messages.
>   References
>     1. [6]https://m.summitracing.com/parts/sme-90a3900
>     2. mailto:[7]tipo874 at gmail.com
>     3. mailto:[8]will.kooiman at gmail.com
>     4. mailto:[9]DeTomaso at server.detomasolist.com
>     5. [10]http://server.detomasolist.com/mailman/listinfo/detomaso
>   _______________________________________________
>   Detomaso Email List is not managed by POCA
>   Posted emails must not exceed 1.5 Megabytes
>   DeTomaso mailing list
>   [11]DeTomaso at server.detomasolist.com
>   [12]http://server.detomasolist.com/mailman/listinfo/detomaso
>   To manage your subscription (change email address, unsubscribe, etc.)
>   use the links above.
>   Members who post to this list grant license to the list to forward any
>   message posted here to all past, current, or future members of the
>   list. They also grant the list owner permission to maintain an archive
>   or approve the archiving of list messages.
>
>References
>
>   1. https://m.summitracing.com/parts/sme-90a3900
>   2. mailto:tipo874 at gmail.com
>   3. mailto:will.kooiman at gmail.com
>   4. mailto:DeTomaso at server.detomasolist.com
>   5. http://server.detomasolist.com/mailman/listinfo/detomaso
>   6. https://m.summitracing.com/parts/sme-90a3900
>   7. mailto:tipo874 at gmail.com
>   8. mailto:will.kooiman at gmail.com
>   9. mailto:DeTomaso at server.detomasolist.com
>  10. http://server.detomasolist.com/mailman/listinfo/detomaso
>  11. mailto:DeTomaso at server.detomasolist.com
>  12. http://server.detomasolist.com/mailman/listinfo/detomaso
>_______________________________________________
>
>
>Detomaso Email List is not managed by POCA
>Posted emails must not exceed 1.5 Megabytes
>DeTomaso mailing list
>DeTomaso at server.detomasolist.com
>http://server.detomasolist.com/mailman/listinfo/detomaso
>
>To manage your subscription (change email address, unsubscribe, etc.) use
>the links above.
>
>Members who post to this list grant license to the list to forward any
>message posted here to all past, current, or future members of the list.
>They also grant the list owner permission to maintain an archive or
>approve the archiving of list messages.

More information about the DeTomaso mailing list