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Old Dec 6, 2005 | 03:19 PM
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Freakazoid!'s Avatar
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Mountain Pass
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From: Pulaski, NY
Piston info wanted

I saw some pistons on EBay with part number C5AE-6110-AU and TRW-B on the undersides. They are dome pistons, but I was wondering what the displacement of the dome was. I couldn't find it in the Steve Christ book, internet search didn't work either, although what I did find made me think these pistons are associated with old school NASCAR engines. Any ideas?
 
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Old Dec 6, 2005 | 04:02 PM
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Those are the stock 427 65-66 medium riser slugs. They were made by TRW and they are a forged slug. I'm pretty sure the dome is +12cc's.

G.
 
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Old Dec 6, 2005 | 05:53 PM
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With todays technology the High rise pistons are of the past! ecept for the Cheby guys with the Big Chambered heads..and they realy arent effective compared to todays standard..when you use a pop up / dome piston..you actually cut of fire to one side of the clylinder..thats why flat tops and dish with zero decks are more effective they fire most all the fuel and air in the chamber and High dome pistons dont..and are more likely to cause detenation!! JMO..Being an Old GM Builder...

Russ
 
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Old Dec 6, 2005 | 05:58 PM
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Freakazoid!'s Avatar
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Is it possible to safely mill them down into flattops? I've heard of plenty of people that have done it, but never anything about reliablilty afterwards.
 
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Old Dec 6, 2005 | 05:59 PM
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Very true Russ. Also guys would mill these domed slugs into flatops for that reason to avoid the cost of a new set.

G.
 
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Old Dec 6, 2005 | 07:38 PM
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RapidRuss
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From: Smith Mountain Lake, VA
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Well the only problem I have run across with the milling.. Is too call the manufacturer and find out how thick the crown is... (the thickness of the bottom of the top of the piston and the actual top..as not to mill to much off and weaken the piston..That is a very critcal area...and can trash a motor in a heart beat... So be for warned..

Russ
 
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