Hypereutectic Pistons???
Postmaster
Joined: Jul 2003
Posts: 2,711
Likes: 2
From: Pittsburgh
there are two peculiarities about them. first, you MUST set the ring gaps to what the piston manufacturer recommends. If you don't, you'll seize a piston in no time.
secondly, if the motor detonates hypereutectic pistons are more prone to crack or shatter than forged or stock cast pistons. They're also more prone to crack if the motor is overheated.
but at the same time, hypereutectic pistons provide for better ring sealing, less blow by, and can take revs better than a plain cast piston while being lighter than a forged piston.
I'm running a set in a 300-6 I have and I have no complaints about them at all.
Justin
secondly, if the motor detonates hypereutectic pistons are more prone to crack or shatter than forged or stock cast pistons. They're also more prone to crack if the motor is overheated.
but at the same time, hypereutectic pistons provide for better ring sealing, less blow by, and can take revs better than a plain cast piston while being lighter than a forged piston.
I'm running a set in a 300-6 I have and I have no complaints about them at all.
Justin
Elder User
Joined: Nov 2002
Posts: 620
Likes: 8
From: USA
From what the machine shop told me, the gap was wider on the top ring because it's higher up on the piston than the stock rings, if I remember right. I'm running a set in my 390. The machine shop I used is very knowledgeable on the FE's and he recommended them and said they were a great piston in the way they are designed.
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