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Old 08-13-2014, 02:12 PM   #1
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So About Them Pistons

I have been reading around trying to find out as much as possible about the 5.0 motor. And found out the pistons are hypereutectic aluminum alloy and was wondering what is the max they can handle along with the other internals. Page 10 - 2011 Mustang GT Coyote Engine - 5.0 Mustang & Fast Fords is a interesting article and very informative. And all those that changed to forged internals what did you do and how much it cost you?

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Old 08-13-2014, 02:22 PM   #2
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Roughly $6,000 for all ARP hardware. And Manley H beams, diamond pistons. Billet oil gears.

The stock pistons are crap, if you have more than 600 the ring glands are on borrowed time.

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Old 08-13-2014, 03:17 PM   #3
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The rods are forged already from what i have read. It seems that both a forget piston and a Hyper piston will last forever if there is no pre-detonition. per wikipedia: The normal temperature of gasoline engine exhaust is approximately 650 °C (1,200 °F). This is also approximately the melting point of most aluminum alloys and it is only the constant influx of ambient air that prevents the piston from deforming and failing. Forced induction increases the operating temperatures while "under boost", and if the excess heat is added faster than the engine can shed it, the elevated cylinder temperatures will cause the air and fuel mix to auto-ignite on the compression stroke before the spark event. Both pistons can suffer from knocking, the forged pistons will bend, where as the Hyper pistons will explode. I think if you have a good tune, never run lower than your tuned octane you should be fine.
It seems the oil gears will shatter with high rpms. here is an article of one that busted after 120 passes on the strip, centrifugal boost of 13-14 psi:
Evolution Performance KILLED my 2011 5.0 Mustang - EvoPerform.com Review - Page 6 - Mustang Parts Product and Vendor Reviews

Also 2013 and 2014 have stronger pistons than the original 2011 and no oil squirter.
link: Confirmed: 2013's have different pistons and no oil squirters - The Mustang Source - Ford Mustang Forums
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Old 08-13-2014, 03:21 PM   #4
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The rods are not forged.
Listen to people who have been down this road. Not from" what I have heard people "

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Old 08-13-2014, 03:23 PM   #5
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They are powder forged. And as Scotty would say, that's like the Walmart brand of forged.


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Old 08-13-2014, 03:28 PM   #6
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the boss 302 rods are " powder forged"
The GT rods as cast. Not powder forged.


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Old 08-13-2014, 04:30 PM   #7
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The crank is forged, that's it. The connecting rods are the weak point of the coyote for sure. There's articles for days about it.


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Old 08-13-2014, 05:41 PM   #8
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Originally Posted by Rapinator126 View Post
the boss 302 rods are " powder forged"
The GT rods as cast. Not powder forged.


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Hmm that article says "power forged" i wonder if it wasnt a typo for powder forged. at any rate does anyone know if the newer 5.0 coyotes have the same connecting rods as the 2011's?

How can someone find this info out?
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Old 08-13-2014, 05:51 PM   #9
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They are not forged. I promise you that. The only thing forged is the crank.

The pistons they may call powder forged. But they aren't. They are cast.

The boss rods are powder or center forged or whatever you choose to call them.

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Old 08-13-2014, 05:53 PM   #10
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Ask anyone that has seen the cute little rods that come out of the coyote.

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Old 08-13-2014, 05:53 PM   #11
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I think it's the '15 that's supposed to get the powder forged ones


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Old 08-13-2014, 05:54 PM   #12
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I think it's the '15 that's supposed to get the powder forged ones


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Yes they are. The same ones from the boss.

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Old 08-13-2014, 06:13 PM   #13
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So About Them Pistons

There's always a weak point, that is unless you have a terminator lol. I'll be interested to see how the 2.3 ecoboost with forged internals holds up to higher boost, bigger turbo, etc.


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Old 08-13-2014, 06:28 PM   #14
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I think ill do forged internals after the vortech - aiming initially for 580-600ish, but will do stronger pistons & rods before swapping the pulley.

The ARP stuff looks nice (I've got a good history with ARP parts), and the manley connecting rods are rather massive compared to the stockers.
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Old 08-13-2014, 07:39 PM   #15
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I think ill do forged internals after the vortech - aiming initially for 580-600ish, but will do stronger pistons & rods before swapping the pulley.

The ARP stuff looks nice (I've got a good history with ARP parts), and the manley connecting rods are rather massive compared to the stockers.

I think I'll build my motor before I go FI. We'll see where the wind takes my finances lol


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Old 08-15-2014, 12:58 AM   #16
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Originally Posted by Soccerluvr4 View Post
They are powder forged. And as Scotty would say, that's like the Walmart brand of forged.


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Well depends on what products... Walmart Brand Ice Cream Sandwich won't melt even in 90+ degree weather and direct sunlight after an hour and a half so by that comparison to a "Walmart Brand" of forging then that's a pretty damn sturdy *** product lol
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