6.7L Stock Pistons Vs Coated 6.7L Industrial Pistons - Page 2 - Dodge Cummins Diesel Forum
07.5 - 09 3rd Gen 6.7L Performance Parts Discussion Discussion of Performance Parts For the 6.7L Trucks...NO ADVERTISING

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post #13 of 57 (permalink) Old 08-11-2010, 06:18 PM Thread Starter
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I'll have to CC them out sometime... Probably have to use the piston without the hole in it..

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post #14 of 57 (permalink) Old 08-11-2010, 07:02 PM
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Hey Bobcat...Are the industrial pistons made by Mahle? Also, what coating do they use?

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post #15 of 57 (permalink) Old 08-11-2010, 07:04 PM Thread Starter
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Hey Bobcat...Are the industrial pistons made by Mahle? Also, what coating do they use?
These are Cummins pistons.

Polydyn coated these.
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post #16 of 57 (permalink) Old 08-11-2010, 07:39 PM
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Damn how much were those pistons
Bet they hurt your pocket

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post #17 of 57 (permalink) Old 08-11-2010, 07:39 PM
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Damn how much were those pistons
Bet they hurt your pocket

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post #18 of 57 (permalink) Old 08-11-2010, 09:28 PM
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Shibby the bowl is larger but it is not as deep as the stock pistons I think it will cc out about the same
Oh I didn't know you were up by Garrett, I'll take your word for it. The lighter color as opposed to the sooted up stocker makes it tough to tell.

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post #19 of 57 (permalink) Old 08-11-2010, 09:55 PM Thread Starter
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Damn how much were those pistons
Bet they hurt your pocket
The pistons would retail close to $250 each.

Coating is just over $50 a piston.
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post #20 of 57 (permalink) Old 08-11-2010, 10:13 PM
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larger bowl will allow more timing safer
that is a huge problem with the duramax guys running too much timing , ends up "trimming" the bowls a little in a bad way !!
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post #21 of 57 (permalink) Old 08-11-2010, 10:24 PM
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The pistons would retail close to $250 each.

Coating is just over $50 a piston.
That is too bad. They look good though! Let us know how they work for you!

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post #22 of 57 (permalink) Old 08-12-2010, 12:15 PM
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We'll see, I didn't melt the stock pistons. I don't plan on making this a huge HP truck either, mainly towing.

Have many people had any luck with less meltage with the high-temp coatings?
We've seen coatings save a couple of motors. One customer got bad fuel and ran nearly 300 miles on toasted injectors (pulling crazy heavy). Scoped the pistons when swapping out the injectors and everything looked great.
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post #23 of 57 (permalink) Old 08-12-2010, 09:40 PM
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Sounds like the way to go ...

Do you have to worry about dis-bondment on the coatings? I know with some coatings the don't like the real high EGT's.

Hate to blow chunks off ...

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post #24 of 57 (permalink) Old 08-12-2010, 11:22 PM Thread Starter
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Polydyn claims it won't flake off. I guess we'll see in 75,000 miles how it looks
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