i am building a 383 stroker and when completed will have 500hp and 500 ft lbs of torque but i need to know the pros and cons of forged and hypereutectic pistons and whcih would be better for this engine?

 

Please post general tech questions in the proper forum...

Since you have a 91, i will move this to 3rd Gen Tech.

Thank You.

 

AFAIK, Forged is stronger but expands a little more than hyperutetic pistons. As such, there is a little more clearance required and may rattle when cold. So it went. I never had that problem and mine were forged. Not sure of the truth of the matter but that is what I heard. It is also more expensive.

I do know they are stronger so if you are building that much power. I would not cheap out and get the hyperutetic pistons.

 

I broke 2 Keith Black hypereutectics in my 400 sbc, so I recommend paying the extra for forged.

Forged come in different alloys. Replacement types (TRW's), expand less, so are run tighter and less likely to rattle. The super dooper $$$ pistons tend to use alloys that expand more, so need more clearance.

 

Hypereutectic is an alumium alloy. These will be lighter than forged but not as strong. If you looking to super charge or spray go with forged.

 

hypereutectic=CRAP, i'll take the stock pistons over them

TRW forged = CHEAP as hypereucrap and way stronger

Thats what I use

 

AFAIK, the stock ones are hypereutectic.

 

hypereutectic don't expand as much because ther made with up to 12% silicon. silicon is high tensiel strength and won't expand under engine temp. conditions.
I don't belive in the shearing strength of the metal ther made with. They are normaly don't bend or streach they just break or shatter.
There also cast like a normal piston.
As far as forged aluminium there $$$ but worth it.
The Al alloy ones most of the time have magnesium which loves to expand when warmed.