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Old 03-10-2003, 05:36 PM
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Question NOS on KB pistons

anyone running over 200hp shot on kieth black pistons. if so what equip are you using and how are they holding up.

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Old 03-10-2003, 07:11 PM
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come on. I know some NOS freaks are out hear
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Old 03-10-2003, 08:39 PM
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I don't know if this helps but I do know that KB pistons that I installed in my motor required more ring gap on the top ring due to their design. If the NOS system you want to install generates more heat it may cause the top ring to bind with bad results
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Old 03-11-2003, 03:02 PM
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KB pistons make more HP by reflecting heat energy back into the combustion process and, as a result, the top ring runs hotter and requires additional end clearance. Increasing ring end gap does not affect performance or oil control because normal end gaps are realized at operating temperatures. Failure to provide sufficient top ring end gap will cause a portion of the top ring land to break as the ring ends butt and lock tight in the cylinder. The broken piece may cause further piston or engine damage.
http://www.kb-silvolite.com/speclear.htm#CHART
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Old 03-11-2003, 05:42 PM
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I read in a book on NOS that hyperutectic pistons will crack and break because of the change in the harmonics when using NOS.

but they were talking about regular hyperutectics. KB are heat treated. they say that this solves the problem.
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Old 03-11-2003, 05:56 PM
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I would never consider anything but forged pistons in a performance engine.

And, if a power adder were used, I say it was more or less mandatory.

Like the man said, "Pay me now or pay me later."
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Old 03-11-2003, 06:30 PM
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I know plenty of people who run the KB (includng myself) who throw nitrous at them and they hold up just fine, as long as you gapped the rings the proper gap and you run the NOS correctly. I know a guy who threw a 500 shot of nitrous on KB and had no problems with it. He is currently going to run an 800 shot wow. They will hold up fine as long as you have everything set up right.
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Old 03-11-2003, 07:17 PM
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I wasn't implying you couldn't do it...of course you CAN do it.

It's about pressure/fatique/strength. A cast piston does not have the strength of a forged one. Running a power adder and high rpms will take their toll on a cast piston over time.
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Old 03-11-2003, 08:00 PM
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I say if you're only going to make 2 or 3 passes every couple of weekends or so they should last a while.

Plenty of STOCK engines have seen a 200 Nitrous shot over the years.

BTW, don't use "NOS" to refer to Nitrous in general. NOS (Nitrous Oxide) is one company that makes Nitrous kits. N2O is the chemical formula for Nitrous Oxide. Plus it makes you sound like a ricer. Rodders say "Nitrous", "The bottle" or "squeeze"
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Old 03-11-2003, 08:08 PM
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I hated that the movie didn't explian to ricers what it was they were oogeling at. "Noss" doesn't even exist in my opinion
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Old 03-12-2003, 06:54 PM
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put nitrous oxide systems in place of NOS and see if it sounds better to you. besides who cares if somone sounds like a ricer anyway. does it bother you that a civic ran a record 6sec 1/4 mile time. I know they cost a ton of money and are harder to build but it's the chalenge and need for speed that pushes us all. I like any fast car reguardless.
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Old 03-12-2003, 07:55 PM
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Hey, if you want to sound dumb, that's fine.
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Old 03-12-2003, 08:08 PM
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tru dat!!

I really don't hate them just the attitude that comes with most "ricers"
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Old 03-13-2003, 04:06 PM
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I will have to find the article again, but in the article it states that when used correctley a hyperutectic piston will actually hold up to N20 better than a forged one!!
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Old 03-13-2003, 04:18 PM
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Can't wait to see it. I'm always open to learning about new or advanced theories.

Thanks.
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