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hyperutechtic pistons...anyone know about them????
id like to know about the pistons also, there is a guy sellin them and this is what he posted:
Hyperutechtic low compression (8.5:1) pistons, stock bore. Hyperutechtic is a newer style metal. its almost as strong as forged and much stronger than cast. these pistons should be able to handle 17psi and higher with proper tuning. so if anyone knows about these pistons let me know, thanks |
Re: hyperutechtic pistons...anyone know about them????
8.5 to one is gay, Hyperutechtic is just a stronger version than cast but still not strong. There not anything new they have been around forever.
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Re: hyperutechtic pistons...anyone know about them????
ok thanks for the help, i've never heard of them....and do you think 8.5:1 is too low
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Re: hyperutechtic pistons...anyone know about them????
I've always thought so for a street car, I think it makes it to doggy when your out of boost. It would be different if you had a big displacment motor that acually put out some torque ;)
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Re: hyperutechtic pistons...anyone know about them????
well the car will no longer be a daily driver, but i am try to stay in the 9-9.5:1 range since its a dohc zc
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Re: hyperutechtic pistons...anyone know about them????
stronger than cast, not as strong as forged but they don't grow and shrink with heat like forged do, so you don't get the cold start piston slap
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Re: hyperutechtic pistons...anyone know about them????
Originally Posted by fork
stronger than cast, not as strong as forged but they don't grow and shrink with heat like forged do, so you don't get the cold start piston slap
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Re: hyperutechtic pistons...anyone know about them????
You sure you can connect them to the "solid 1 piece" rods youve got?
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Re: hyperutechtic pistons...anyone know about them????
Originally Posted by Ravage70
Originally Posted by fork
stronger than cast, not as strong as forged but they don't grow and shrink with heat like forged do, so you don't get the cold start piston slap
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Re: hyperutechtic pistons...anyone know about them????
the hypers gotta be fairly strong, my buddy's mustang has a 351 in it with kieth black hyperutectic pistons 10:1 c/r i believe, anyway he sprays them with a 175 shot of happy gas all the time and they havent failed yet...
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Re: hyperutechtic pistons...anyone know about them????
In all honesty, hyper eutectics are better than forged IF you are not running big boost or big nitrous, and you have a half decent tune, ie no detonation
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Re: hyperutechtic pistons...anyone know about them????
17 psi ??? ok on what turbo? its more about the horspower and your rods then how much boost theyre gonna hold. :-\
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Re: hyperutechtic pistons...anyone know about them????
They come stock in 5.0's
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Re: hyperutechtic pistons...anyone know about them????
Ok, so would these pistons be of any use to a honda owner? Are they availabe for the Bseries motors? Would they work with stock rods? Forged rods? What HP are they good to? And how much $$$ and where from ???
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Re: hyperutechtic pistons...anyone know about them????
Originally Posted by Whitey
They come stock in 5.0's
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Re: hyperutechtic pistons...anyone know about them????
The thing with these pistons are that they dont like any detonation.If detonation occurs i havent seen or heard of a set living.They shatter like glass. My 2 cents worth
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Re: hyperutechtic pistons...anyone know about them????
Originally Posted by Cadracer
The thing with these pistons are that they dont like any detonation.If detonation occurs i havent seen or heard of a set living.They shatter like glass. My 2 cents worth
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Re: hyperutechtic pistons...anyone know about them????
Originally Posted by random-strike
Originally Posted by Ravage70
Originally Posted by fork
stronger than cast, not as strong as forged but they don't grow and shrink with heat like forged do, so you don't get the cold start piston slap
with enough mileage the cylinder walls wear which will cause piston slapparoos :y |
Re: hyperutechtic pistons...anyone know about them????
Hypereutectic refers to the fact that due to grain orientation in metals, there is only so much of a certain alloying agent that can be added to a metal that will actually form a solid 'metallic atomic bond' within the crystalline structure. This theoretical maximum is called the eutectic point of the alloy. Any alloying agent added past this point doesn't really bond very well and is more or less just chilling there. In this case, when alloying aluminum and silicon, the eutectic point is somewhere near 12.5% silicon. A common hypereutectic alloy is 390 aluminum (made famous by the Chevrolet Vega) which works well for this application. This alloy is somewhere near 14%, or something, I have had a lot to drink... anyway, the extra silicon is killer for scuff resistance on a cylinder wall. Not to mention the real reason for they alloying in the first place- if you fill in the crystalline structure of a metal, it gets more rigid. Pistons hold their shape better, face less thermal expansion/contraction because simply, the grains can't slide past each other as easily if they are subject to more atomic bonding, and as a tradeoff are indeed more brittle as the percentage of alloying agent increases up to the eutectic point. As compared to 2618 T61 alloys (the noisy, slappy ones with ~2% silicon) hypereutectic alloys aren't really that weak as far as absolute tensile strength (you can rev the ---- out of them still) but they do indeed suffer more than a more ductile 2618 T61 when detonated on. I dig 4032 T6 alloy. It makes a pretty good compromise as it is right at the eutectic point. That's what you will find in my car. -Peace
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Re: hyperutechtic pistons...anyone know about them????
most bmws and most vws come stock with Hypereutectic pistons...
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Re: hyperutechtic pistons...anyone know about them????
Originally Posted by swartz
most bmws and most vws come stock with Hypereutectic pistons...
all the GT and older Cobra mustangs come with HEs |
Re: hyperutechtic pistons...anyone know about them????
Originally Posted by random-strike
Originally Posted by swartz
most bmws and most vws come stock with Hypereutectic pistons...
all the GT and older Cobra mustangs come with HEs |
Re: hyperutechtic pistons...anyone know about them????
Originally Posted by 2BG4HNDA
Originally Posted by random-strike
Originally Posted by swartz
most bmws and most vws come stock with Hypereutectic pistons...
all the GT and older Cobra mustangs come with HEs there is one year of fox's that came with HE's though. i believe 92. i meant to say the NEWER gts, like the sn95 5.0 and the OHC engines. |
Re: hyperutechtic pistons...anyone know about them????
Originally Posted by random-strike
Originally Posted by 2BG4HNDA
Originally Posted by random-strike
Originally Posted by swartz
most bmws and most vws come stock with Hypereutectic pistons...
all the GT and older Cobra mustangs come with HEs there is one year of fox's that came with HE's though. i believe 92. i meant to say the NEWER gts, like the sn95 5.0 and the OHC engines. |
Re: hyperutechtic pistons...anyone know about them????
Yep. 93 and newer stangs both 4.6 and 5.0 were hyper. Before that they were forged. I run the stock hypereutectic pistons in my 97 GT. This motor has 280,000 miles on it and runs perfectly. Compression is 180 all around. I have been running a blower with 10 psi boost for the last 173,000 miles. The car uses 1 quart of oil per 1000 miles currently. I have had some mild detonation a few times but never going all out at 10 psi boost. I think the hypereutectics get an undeserved bad rap. With a decent tune, as I have shown in my case, they are excellent. A bad tune will kill any pistons. All that being said, building a forced induction motor from the ground up, forged are the way to go. They give you a little more room for error. Mustang people running forced induction with stock pistons usually see ringland failures if they detonate under boost. For my turbo car, I used forged pistons in the 5.0.
Erich |
Re: hyperutechtic pistons...anyone know about them????
Originally Posted by Erich
Yep. 93 and newer stangs both 4.6 and 5.0 were hyper. Before that they were forged. I run the stock hypereutectic pistons in my 97 GT. This motor has 280,000 miles on it and runs perfectly. Compression is 180 all around. I have been running a blower with 10 psi boost for the last 173,000 miles. The car uses 1 quart of oil per 1000 miles currently. I have had some mild detonation a few times but never going all out at 10 psi boost. I think the hypereutectics get an undeserved bad rap. With a decent tune, as I have shown in my case, they are excellent. A bad tune will kill any pistons. All that being said, building a forced induction motor from the ground up, forged are the way to go. They give you a little more room for error. Mustang people running forced induction with stock pistons usually see ringland failures if they detonate under boost. For my turbo car, I used forged pistons in the 5.0.
Erich whats the compression on your 5.0? is it stock compression? whats the psi in each cylinder? |
Re: hyperutechtic pistons...anyone know about them????
i gotta agree with alot of what is being said. Hyper-eutectic's are infact stronger than a cast piston, yet are also infact weaker than a forged one. I believe Forged and Hypereutectic pistons are about the same price. If I'm not mistaken, Hypereutectic pistons are able to be used with non-forged rods, which makes them a nice choice to guys with a low budget. In this case though, it dosen't benefit us honda guys since rods give out at about the same point our ring lands do! I do know that alot of muscle car guys run Hypereutectic pistons in their muscle car's(namely the Keith Urban's).
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Re: hyperutechtic pistons...anyone know about them????
then what did my 92 have
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Re: hyperutechtic pistons...anyone know about them????
So does anyone make Hypertectic pistons for Hondas?
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Re: hyperutechtic pistons...anyone know about them????
Originally Posted by shanerv
i gotta agree with alot of what is being said. Hyper-eutectic's are infact stronger than a cast piston, yet are also infact weaker than a forged one. I believe Forged and Hypereutectic pistons are about the same price. If I'm not mistaken, Hypereutectic pistons are able to be used with non-forged rods, which makes them a nice choice to guys with a low budget. In this case though, it dosen't benefit us honda guys since rods give out at about the same point our ring lands do! I do know that alot of muscle car guys run Hypereutectic pistons in their muscle car's(namely the Keith Urban's).
1. HE pistons are cast 2. HE pistons are WAY cheaper than any forged peice, sometimes less then OEM replacements 3. since when did forged pistons have to have forged rods attached 4. keith urban is a country singer 5. Keith Black makes HE pistons |
Re: hyperutechtic pistons...anyone know about them????
Originally Posted by shanerv
i gotta agree with alot of what is being said. Hyper-eutectic's are infact stronger than a cast piston, yet are also infact weaker than a forged one. I believe Forged and Hypereutectic pistons are about the same price. If I'm not mistaken, Hypereutectic pistons are able to be used with non-forged rods, which makes them a nice choice to guys with a low budget. In this case though, it dosen't benefit us honda guys since rods give out at about the same point our ring lands do! I do know that alot of muscle car guys run Hypereutectic pistons in their muscle car's(namely the Keith Urban's).
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Re: hyperutechtic pistons...anyone know about them????
Compression in my 5.0 is allegedly 9.2:1 with the piston/head combo I have. I never did a compression test on that motor. The 180 all around is in my high mileage 97 GT which has a 4.6L. There was some variation between cyl but it was between 179-185. that motor is 9:1. I have been testing it for years-nearly everytime I change plugs which is every 10K. It never changes.
Erich |
Re: hyperutechtic pistons...anyone know about them????
Originally Posted by Erich
I run the stock hypereutectic pistons in my 97 GT. This motor has 280,000 miles on it and runs perfectly. Compression is 180 all around. I have been running a blower with 10 psi boost for the last 173,000 miles. The car uses 1 quart of oil per 1000 miles currently. I have had some mild detonation a few times but never going all out at 10 psi boost.
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Re: hyperutechtic pistons...anyone know about them????
Originally Posted by Erich
Compression in my 5.0 is allegedly 9.2:1 with the piston/head combo I have. I never did a compression test on that motor. The 180 all around is in my high mileage 97 GT which has a 4.6L. There was some variation between cyl but it was between 179-185. that motor is 9:1. I have been testing it for years-nearly everytime I change plugs which is every 10K. It never changes.
Erich |
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