[DeTomaso] Tapered ring compressor

Thomas Törnblom tipo874 at gmail.com
Sat Jul 1 08:12:09 EDT 2017


I should have said that it has a slit, not that it is sliced.

https://m.summitracing.com/parts/sme-90a3900

> 1 juli 2017 kl. 09:02 skrev Thomas Törnblom <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 <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.
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>> 
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-------------- next part --------------
   I should have said that it has a slit, not that it is sliced.

   [1]https://m.summitracing.com/parts/sme-90a3900

   1 juli 2017 kl. 09:02 skrev Thomas Toernblom <[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]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.

     _______________________________________________

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     Posted emails must not exceed 1.5 Megabytes

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     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


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