Keith Black Hypereutectic Pistons
Safety Car
Joined: May 2003
Posts: 3,789
Likes: 0
From: [Quote=WOEII] Is dried brown doodie powders man! [/Quote]
Originally Posted by Rusted40
MAKE SURE you check the ring gaps
follow piston manufacturer reccomendations on this
I have seen the top ring land beaten out of these from
too little ring gap clearance
follow piston manufacturer reccomendations on this
I have seen the top ring land beaten out of these from
too little ring gap clearance
Been there, done that. Had the parts in my oil pan to prove it.
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
At our engine shop we don't feel comfortable using hypers as over the last few years we have had more calls and emails on broken hypers then all the years dealing with forged pistons.
No matter how your look at it its still a cast piston.
No matter how your look at it its still a cast piston.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Originally Posted by loiq
Are they junk?
I'd run them over 7000 on many occasions like drag racing. Open road racing at constant high rpm and they melted the skirts and ring lands. clouds of blue smoke and it sounded like rod knock.
They have some good points like tight cylinder to wall clearance. They would be fine in mildly built up motors.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Like stated above good for mild buildups and occasional blips to 6500RPM but for a serious motor ( racing applications, sustained high RPM ) go forged. And like stated above you cannot gap the rings the same as other hyper pistons, has something to do with the material they are made of 
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by Rusted40
MAKE SURE you check the ring gaps
follow piston manufacturer reccomendations on this
I have seen the top ring land beaten out of these from
too little ring gap clearance
follow piston manufacturer reccomendations on this
I have seen the top ring land beaten out of these from
too little ring gap clearance
I've been running them for over 20K miles in my current engine with no problem. Proper ring gap is indeed critical though.
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