Forged, Hypereutectic, or Cast pistons

[caspert_ghost]

I have been doing some research as to what parts to get for my up coming project.

Project plan is a 4G63 1G Talon AWD (have yet to buy)

While I am searching around for a good deal on a stock unmolested car, I will be getting some of the plan written up on the design, cost, and strategy to do the build.

Once the stock is stripped down to just the block, the first thing (IMHO) is getting the bore to be an exact match for the pistons, which brings me here;
With the ability to ad power as I become a better DSMer.
My goal is 500 to start but any real enthusiast knows once you reach a goal you extend it.
So treat me as a newbie as my experience is with big block Mopar and have never opened the hood of a DSM or delt with any type of turbo system.

Questions:
Pistons: Are the differences only noted at higher outputs of power?
Other than cost what would the pros and cons be between:
Forged, Hypereutectic, or Cast pistons?

 

[delta448]

2618 alloy (2% silicon) forged pistons are the strongest but undergo the most thermal expansion. You might have to deal with minor piston slap until the engine is warmed up.

4032 alloy (11% silicon) forged pistons are not as strong as 2618 but expand significantly less.

OEM DSM 4G63 pistons are cast. Cast pistons have less expansion but are also much weaker than a forged piston of the same design.

Hypereutectic pistons are usually a cast piston, but can also be a forged piston. The only rule is that it must contain higher than 12% silicon in the alloy. This in turn creates an ultra low expansion piston that does not absorb as much heat and can be fit with tight tolerances. However, it is much more brittle due to the high silicon content, which is a very bad thing in a forced induction engine that experiences any detonation or knock. Danger. Will. Robinson.

 

[vingasoline]

I have je forged pistons 2618. There is a little piston slap while it's warming up. I think if I had to build it again I would go with 4032. Both are capable of high hp numbers. Stock pistons are good for 500hp, but get the 2g ones for the higher compression ratio.

I'm into my build for about 10 grand and it's still not done. I'll be lucky to hit 500hp. Now you know what you're getting into.

 

[caspert_ghost]

I read several posts referring to "piston slap" is this common with all pistons or just the forged?
Is it noticeable sound?
Is it bad, or can it damage the piston walls?

I have je forged pistons 2618. There is a little piston slap while it's warming up. I think if I had to build it again I would go with 4032. Both are capable of high hp numbers. Stock pistons are good for 500hp, but get the 2g ones for the higher compression ratio.

I'm into my build for about 10 grand and it's still not done. I'll be lucky to hit 500hp. Now you know what you're getting into.

He he he, I've known what I'm getting into. My cuda project ran close to 8k with major body mods (rear wheel housing was stretched across the body for wide slicks.
Hood was modified to fit a 7" blower rise , but it was a funproject and I hope this will Be as well.

 

[92AWDTalonTSI]

4032 alloy in my opinion. But either way. Grats on coming to the dark side. And remember, when you hit 500 you'll want 500 more.

 

[AK Maniak]

I'm sitting at around 4k and that's only bolt ons. I figure that by the time it's built, swapped to a 5 speed, converted to an eclipse ( don't hate) and under goes a complete color change I'll have over 20 grand into it. It's only going to be as expensive as you want it to be.