Hypereutectic pistons + N20...Will it work?

[nidyanazo]

Getting some Keith Black pistons and plasma mony rings, compression will be 9.1:1 On a fresh rebuild. 0.30" over, balanced and blueprinted. Will it take a 125-150 wet shot safely? I'm guessing the weak link won't be the pistons/rings, but the stock rods/rod bolts. Any imput?
:SNSign:

 

[mackey]

As long as the tune is good you should have no problems.

 

[I_AM_CANADIAN]

As long as the tune is good you should have no problems.

, I don't have much to say other than from what I've heard it CAN be done, with the right tune.

 

[STANGateURlilSS]

yes it can be done.. but those pistons.. do not like the gas too much.. in the right tune it can be done.. but forged are a much better way to go.. but yes it can be done.. with the right tune..

 

[95COBRA241]

The biggest problem with hypers and nos or f/i is detonation. Right tune..no problem

 

[304billet]

The hyper's can take only 400rwhp safely. Beyond that ur pushing it. The stock block and stock internals r good to around 500rwhp.

Bottom line is if ur hitting 300/300 @ the RW and u throw on a 150 shot it won't last long. Keep the shot under 100.

 

[nidyanazo]

I'll be running with maybe ~6-8* timing, and 102 octane.
Thinking 125 shot.....???

 

[payupsucka]

i would keep it low with the hyper pistons just a little detonation will ventilate them bitches

 

[wazazzle]

it can be done, but personally i wouldn't risk it. just fork out the extra bucks for forged dish and don't worry about it. that's what i'm doing.

 

[nidyanazo]

Anyone know of some cheep ones?? Flattop, or with 2 valve reliefs? The KB's are pretty nice.....but I would love to go forged....

 

[millhouse]

The hyper's can take only 400rwhp safely. Beyond that ur pushing it. The stock block and stock internals r good to around 500rwhp.

Bottom line is if ur hitting 300/300 @ the RW and u throw on a 150 shot it won't last long. Keep the shot under 100.

The pistons are fine. With a good tune, the block will split before the pistons let go.

 

[Michael Yount]

Hypers have upsides and downsides. They are harder and in some ways actually stronger than forged pistons. They are also thermally MUCH more stable - so they can be sized to fit in the cylinder much tighter than forged - be sure your machinist knows which piston you're using before you do final cylinder sizing.

Because they're harder, they're more brittle than a forged piston - the forged units have much more ductility. Consequently, when things do go wrong - for example a lean-mixture induced detonation in the cylinder at high rpm -- the hypers tend to break or shatter; the forged units are more forgiving. In layman's terms -- the forged units bend, the hypers break. When you have a catastrophic piston failure at speed, it tends to take out a bunch of other stuff too. When the forged unit fails, you might lunch the piston, but not significantly hurt much else.

That's why people tend to say don't use hypers under boost or with nitrous. And also why they say if the tune is right, they'll likely hold up fine.

So the question is simple -- how certain are you that you can absolutely control mixture in the chamber under all circumstances? And by the way -- looking for "cheep" pistons for a nitrous application is an accident waiting to happen.

 

[FORCED2DV8]

Hypers have upsides and downsides. They are harder and in some ways actually stronger than forged pistons. They are also thermally MUCH more stable - so they can be sized to fit in the cylinder much tighter than forged - be sure your machinist knows which piston you're using before you do final cylinder sizing.

Because they're harder, they're more brittle than a forged piston - the forged units have much more ductility. Consequently, when things do go wrong - for example a lean-mixture induced detonation in the cylinder at high rpm -- the hypers tend to break or shatter; the forged units are more forgiving. In layman's terms -- the forged units bend, the hypers break. When you have a catastrophic piston failure at speed, it tends to take out a bunch of other stuff too. When the forged unit fails, you might lunch the piston, but not significantly hurt much else.

That's why people tend to say don't use hypers under boost or with nitrous. And also why they say if the tune is right, they'll likely hold up fine.

So the question is simple -- how certain are you that you can absolutely control mixture in the chamber under all circumstances? And by the way -- looking for "cheep" pistons for a nitrous application is an accident waiting to happen.

Amen

 

[fiveohGT]

when i ran 125shot on my stock block the first thing to go was my crankshaft....but that was on a ****y TUNE

 

[Michael Yount]

fiveoh - what year stock block? Did you have block damage as well?