Re: Collapsed skirts on used pistons
Posted by Jack Vines On 2016/12/16 0:50:09
Your opinions and results may vary, but for those who are still with us.
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You do know custom connecting rods are $2000 a set?
Quote:Given today's oils and classic collector car use, it's highly unlikely any Packard V8 being built tomorrow will be driven the 150,000 miles necessary to wear out a set of forged pistons and moly rings.
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The .070" lower deck height of the Mopar 413" (.110" total) does not produce any squish/quench. The lower compression produces (approx 7.5:1) noticeably less power and torque. If those are not important to an owner, then run them.
By maintaining a tight piston to head at TDC at the outer edges of the piston (.030" to .045" is ideal), but slightly lowering the overall compression to 9:1 or 9.5:1 by allowing that squished mixture to gather in a dish, better combustion with less ping.
Here's the Packard V8 I built for my Stude pickup.
jack vines
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SBC pistons and CUSTOM made rods. Why not????
You do know custom connecting rods are $2000 a set?
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Rods don't wear out. Pistons and rings DO wear out and crack etc.
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If custom forged pistons are being used with a DISH (due to 10:1 CR too much for modern fuel) then why would the lower deck height of the 413 MoPar piston crown present a problem????
The .070" lower deck height of the Mopar 413" (.110" total) does not produce any squish/quench. The lower compression produces (approx 7.5:1) noticeably less power and torque. If those are not important to an owner, then run them.
By maintaining a tight piston to head at TDC at the outer edges of the piston (.030" to .045" is ideal), but slightly lowering the overall compression to 9:1 or 9.5:1 by allowing that squished mixture to gather in a dish, better combustion with less ping.
Here's the Packard V8 I built for my Stude pickup.
jack vines
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