[DeTomaso] 351C Piston Needed

[John Taphorn]

Jack

Originally it was a track engine.  I am toning it down a bit. The 
pistons have floating pins.  Thanks for he insight and suggestion. Good 
to have options

JT
On 10/20/2014 3:28 AM, jderyke at aol.com wrote:
> 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 It is a forged pop-up originally made by TRW as L2348F.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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>
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-------------- next part --------------
   Jack
   Originally it was a track engine.  I am toning it down a bit. The
   pistons have floating pins.  Thanks for he insight and suggestion.
   Good to have options
   JT

   On 10/20/2014 3:28 AM, [1]jderyke at aol.com wrote:

     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 [2]<jtaphorn at kingwoodcable.com>
   To: detomaso [3]<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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References

   1. mailto:jderyke at aol.com
   2. mailto:jtaphorn at kingwoodcable.com
   3. mailto:detomaso at POCA.com
   4. mailto:DeTomaso at poca.com
   5. http://poca.com/mailman/listinfo/detomaso_poca.com