whats the difference between these two. what do they mean?

 

Quickly,

A Forged piston uses a forging that is machined into the specs to fit your engine and is a stronger piece.

A Hypereutectic is a cast piston with a hyper (saturated) amount of silicone in the aluminum, this creates a very strong cast piston that can a handle 500+hp and run standard small tolerances between it and the bore for a quiet running engine.

Old Stroker will come on here and do a much longer explaination I am sure.

Bret

 

http://www.automotiverebuilder.com/ar/ar129832.htm

All you need to know.

-Mindgame

 

...and then some.

First time I've heard of a "destroked" piston. It seems to mean a shorter compression height.

 

Yeah, them damn product design engineering managers... when will they ever get up on modern lingo.

-Mindgame

 

the reason i ask is i was thinking about building a custom engine, but i found a crate that will come close to my needs...although the crate doesn't have forged pistons, it has the other.

what is the biggest reason that you would want one over another?

thanks for all the help guys!!

 

In almost any engine I would use Hypers, if you are going to blow/turbo the car then any kind of detonation could be instantly fatal on a hyper engine, so if your looking at serious numbers I would go forged, although a well built and well thought out 'charged engine with hypers I wouldn't doubt could be done. Any kind of bad luck with gas, slight oil leak or blow by causing reduction in octane levels, those sort of things would be risky...

If your looking at a strong NA engine then good hypers is 100% the way to go IMO, with a little nitrous I still wouldn't go forged, but there will of course come a point when forged will be alot more comfortable a route.

 

why wouldn't i want to just go forged so that i wouldn't have to tear it apart later down the road? is cost the only reason?

 

Blow by at startup, probably not as nice wear characteristics (piston slap at the worst, depending on assembly), and generally a heavier rotating assembly. As was noted above you can run tigher clearances with a cast piston, and hypers are strong enough.

Forged is old school IMO, or for blower folks that "need" it.

 

Dr.Mudge is 100% correct.

As a matter of fact, a good hypereutectic will take MORE power before disintegrating than a forged one, with one exception: you must NOT allow detonation to occur, since they are brittle.

My stock bottom LT1 has been putting out 600hp with a 200 shot for over 3 years on the stock hypers. I don't even have the knock sensor active at WOT. I do have a complete overkill aftermarket fuel system, from tank to pump, to lines, to regulator to insure that no detonation ever takes place.

 

anyway you could email me or post a comprehensive list of the essential parts of your fuel system to compare and see if i'm setup to handles such power?

thank you so much guys for taking the time.......

 

Got to my web site, I have all the info under Tech Section, then Fuel Flow.

 

thanks...

 

Do forged weigh more or less than hyper? What kind of difference are we talking for a comparable piston. I.e a flat top with four valve releifs. I appreciate the help!

 

If you are building a motor and buying pistons, buy forged.

If you are running bolt on power adders and want to keep the HyperS pistons than do so and save your money for the inevitable rebuild.

It may be possible to put lots of power through hypereutectic pistons but why? if you are in the short block anyhow.

Perry