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Discussion Starter #1
I work at a major piston manufacturer and we are working on bringing new products to our customers, specifically for the 4-stroke ATV market. Some machines we are targeting include:

Yamaha Raptor 660/700, YFZ450
Polaris RZR 800, XP 900
Honda TRX450R
Kawasaki Brute Force, KFX700, Prairie

We are producing a superior product above anything else that is currently on the market, withstanding higher horsepower levels, more boost, larger nitrous applications, and more technical tunability.

Giving us suggestions/feedback from your current experience with aftermarket pistons in these machines will help us better improve the quality parts that you may already have.
 

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Cooling fins? Lol. Make titanium pistons.
 

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That is a battle of the ages there. Durability generally comes with thickness, but thickness means weight. So a heavier piston is the answer, but we need a lighter piston in order to spin rpm and make any kind of power. Its a battle that all piston designers face.

One of the ways we have had great success managing heat is with the use of our in-house hard coat anodizing. It started to gain commercial popularity in NHRA Top Fuel and Funny Car engines and from there we have applied it to everything from Pro Mod Busa's on nitrous to Offshore boats. Having the program in house we can greatly reduce the cost and offer expedited delivery times that other shops just can't compete with.

I hope that answers the question here. Did you see any cracks in your current pistons due to heat?
 

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The more exotic the metal, the more heat it can take, but the more it will cost... The fin idea would work to allow the oil to cool it if a jet would be there to squirt the oil. Afterall, one fo the functions of oil is to cool.

How can surface conversion for hardness alter the melting point? Or was this just for cracking?
 

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How many piston failures does this motor see?? basically ZERO.

headgaskets blow, rods blow, cases crack. ALL pistons hold plenty strong even on heavy NOS apps.

anodizing them will help with heat and corrosion from nitro and alky. but who the hell is running that??
 

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How many piston failures does this motor see?? basically ZERO.

headgaskets blow, rods blow, cases crack. ALL pistons hold plenty strong even on heavy NOS apps.

anodizing them will help with heat and corrosion from nitro and alky. but who the hell is running that??
Our findings have been that the hard anodize prevents thermal saturation of the aluminum and thus, reduces its pliability and risk of defect. True, it is used with nitro, but by and large, our anodized pistons have been used in gasoline engines.
 
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