Hypereutetic Pistons
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1st Gear Member
Joined: Oct 2006
Posts: 128
From:
Hypereutetic Pistons
I've always heard that hypereutetic pistons were made to be equipped with computer controlled car. (EFI) But i'm not building anything close to computer controlled, so what do they me by hypereutetic? Are they for computer controlled or smogger engines?
3rd Gear Member
Joined: Apr 2006
Posts: 1,406
From: Canton MI
RE: Hupereutectic Pistons
It's just the type of material and the way it was casted. You can use them with either computer controled, smog, or carbed motors.
Hypernumatic is an alloy whose chemical composition is above that of the eutectic. In hypereutectic Al-Si alloys, the first phase to form on solidification is primary Si. Phosphorus-based additives are often used to refine it.
So pretty much it's an aluminum/silcione piston.
Hypernumatic is an alloy whose chemical composition is above that of the eutectic. In hypereutectic Al-Si alloys, the first phase to form on solidification is primary Si. Phosphorus-based additives are often used to refine it.
So pretty much it's an aluminum/silcione piston.
3rd Gear Member
Joined: Mar 2006
Posts: 925
From: Orange, Texas
RE: Hupereutectic Pistons
stay away from hypereutectic pistons, a tuning mistake can cause them to shatter. they are not made for high performance applications. BTW ... "thats controlled" mister grammer. quit correcting people if you can't spell yourself. Sick
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1st Gear Member
Joined: Oct 2006
Posts: 128
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RE: Hupereutectic Pistons
Sorry about the spelling I was in a hurry. Anyway the 350 i'm building will only be 350 or 375 hp and will be about 10.25.1 compression; so will hypereutectic pistions be fine? Or should I go with regular alunimum cast pistons?
THX
THX
3rd Gear Member
Joined: Sep 2006
Posts: 793
From: San Antonio, Texas
RE: Hupereutectic Pistons
69camaro1
Hypereutetic pistons are only a "better" cast piston. Is most circumstances, they will hold up better than a regular cast piston because of their higher silicone content which make them withstand heat better. Any cast piston can shatter when put under extreme stress. Therefore, the hypereutectic is better suited to most cast piston application needs.
Hypereutetic pistons are only a "better" cast piston. Is most circumstances, they will hold up better than a regular cast piston because of their higher silicone content which make them withstand heat better. Any cast piston can shatter when put under extreme stress. Therefore, the hypereutectic is better suited to most cast piston application needs.
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1st Gear Member
Joined: Oct 2006
Posts: 128
From:
RE: Hupereutectic Pistons
Oh ok. Thx for all the help I'll be going with the hypereutectic pistons. By the way if you ever look in Jegs the regular cast pistons are the same price as the hypereutectic pistons. So theres no point in even bothering with regular cast. By the way it will be fine running on pump 89 won't it?
