[DeTomaso] 351C Piston Needed

[jderyke at aol.com]

John, is this supposed to be a track engine? That slug was not popular for very long being TRWs highest dome forged piston at 0.425". With a closed chamber head it gave 12-1/2:1 C.R, and with open chamber heads it gave nearly 11:1. Iron-head Clevelands needed 110 octane race gas to run them safely. Only drag racers usually picked that part number. And if you find a replacement, they came with both pressed-fit piston pins and floating pins, and if they were floating pins, they could be either Tru-arc snap rings or Spirolox. The grooves were slightly different for the two retainers..So you may have trouble finding a 2348F-030 that's useable in your setup. But there's a simple fix (unless you expect the motor to last 100,000 miles) known only to about 300 race shops and poor boys all across the U.S.

TRW pistons were made of 2618-aluminum which is weldable. Practically all old-time engine guys have weld-repaired pistons- some in the pits at race tracks. So get someone who knows what he's doing with a TIG, and rebuild the dome area you cut too low. Then re-machine it to match the others. It WILL work with no ill effects if the TIG guy minimizes the heating effect..

Good luck- J DeRyke (weld-repaired Kawasaki 2-stroke pistons as well as TRWs)

 

 

 

-----Original Message-----
From: John Taphorn <jtaphorn at kingwoodcable.com>
To: detomaso <detomaso at POCA.com>
Sent: Sun, Oct 19, 2014 5:43 pm
Subject: [DeTomaso] 351C Piston Needed



On my journey of adventure to reduce compression in my engine I milled 
to much off the top of one of my pistons.  Live and learn.  I should 
have stopped at 100/1000th.

I am now looking for a single piston to complete my set.

It is a forged pop-up originally made by TRW as L2348F.  It was also 
marketed by Manley as P5648 and Speedpro as L2348F .  I need it to be 
.030 over.

Please let me know if you have one , or more, lying around that are 
taking up space.

Got my fingers crossed -Gotta be a bunch of them out there.

Just askin'

JT
713.553.5475



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-------------- next part --------------
   John, is this supposed to be a track engine? That slug was not popular
   for very long being TRWs highest dome forged piston at 0.425". With a
   closed chamber head it gave 12-1/2:1 C.R, and with open chamber heads
   it gave nearly 11:1. Iron-head Clevelands needed 110 octane race gas to
   run them safely. Only drag racers usually picked that part number. And
   if you find a replacement, they came with both pressed-fit piston pins
   and floating pins, and if they were floating pins, they could be either
   Tru-arc snap rings or Spirolox. The grooves were slightly different for
   the two retainers..So you may have trouble finding a 2348F-030 that's
   useable in your setup. But there's a simple fix (unless you expect the
   motor to last 100,000 miles) known only to about 300 race shops and
   poor boys all across the U.S.
   TRW pistons were made of 2618-aluminum which is weldable. Practically
   all old-time engine guys have weld-repaired pistons- some in the pits
   at race tracks. So get someone who knows what he's doing with a TIG,
   and rebuild the dome area you cut too low. Then re-machine it to match
   the others. It WILL work with no ill effects if the TIG guy minimizes
   the heating effect..
   Good luck- J DeRyke (weld-repaired Kawasaki 2-stroke pistons as well as
   TRWs)

   -----Original Message-----
   From: John Taphorn <jtaphorn at kingwoodcable.com>
   To: detomaso <detomaso at POCA.com>
   Sent: Sun, Oct 19, 2014 5:43 pm
   Subject: [DeTomaso] 351C Piston Needed
On my journey of adventure to reduce compression in my engine I milled
to much off the top of one of my pistons.  Live and learn.  I should
have stopped at 100/1000th.

I am now looking for a single piston to complete my set.

It is a forged pop-up originally made by TRW as L2348F.  It was also
marketed by Manley as P5648 and Speedpro as L2348F .  I need it to be
.030 over.

Please let me know if you have one , or more, lying around that are
taking up space.

Got my fingers crossed -Gotta be a bunch of them out there.

Just askin'

JT
713.553.5475



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