engine finally gave
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From: ft. lewis/ milwaukee, WI
ive seen it you have a realy clean setup
Last edited by mrbelvedere; Dec 16, 2011 at 12:07 PM.
if you think the plug caused that then you are way off that piston is melted fuel got past the top ring then it was ignited fractured the piston when the piston fractures it starts melting because you expose the part of the piston that isent hardend so each time the fuel ignites a little more melts away all the shiney rough spots is from the strap of the plug being beat around inside of the cylnder
Ill get my 2 cents worth in here.
Detonation
Detonation is the spontaneous combustion of the end-gas (remaining fuel/air mixture) in the chamber. It always occurs after normal combustion is initiated by the spark plug. The initial combustion at the spark plug is followed by a normal combustion burn. For some reason, likely heat and pressure, the end gas in the chamber spontaneously combusts. The key point here is that detonation occurs after you have initiated the normal combustion with the spark plug.
Pre-ignition
Pre-ignition is defined as the ignition of the mixture prior to the spark plug firing. Anytime something causes the mixture in the chamber to ignite prior to the spark plug event it is classified as pre-ignition. The two are completely different and abnormal phenomenon.
I started a new thread for everyone to read and learn.
https://www.cobaltss.net/forums/gene...nition-267519/
Detonation
Detonation is the spontaneous combustion of the end-gas (remaining fuel/air mixture) in the chamber. It always occurs after normal combustion is initiated by the spark plug. The initial combustion at the spark plug is followed by a normal combustion burn. For some reason, likely heat and pressure, the end gas in the chamber spontaneously combusts. The key point here is that detonation occurs after you have initiated the normal combustion with the spark plug.
Pre-ignition
Pre-ignition is defined as the ignition of the mixture prior to the spark plug firing. Anytime something causes the mixture in the chamber to ignite prior to the spark plug event it is classified as pre-ignition. The two are completely different and abnormal phenomenon.
I started a new thread for everyone to read and learn.
https://www.cobaltss.net/forums/gene...nition-267519/
Both of those would leave more of a mark on the top of the piston, well kind of. My theory is that the ground strap broke off the plug and welded itself to the piston, then it created a hotspot there which caused detonation to be focused in that area.
Lol listen..... I know what im talking about. Ops setup was not finished. Hes running e85 with 80 s and don't have a upgraded pump or didn't have the reference fuel system. Then they put it in and didnt log it for me to tune. So there for it can be many things. I feel it was the plug, reasoning is I've seen this before on many other cars. Grounding strap breaks and gets squished within the wall of sleeve and piston. Or the fact the plugs were.misfiring causing washing of the wall which therefore caused the explosion to the piston. Melting, boom, same thing. Autolites are junk. And motocraft should throw them away..[/B]
now im not slamming anyone but from how he explains things he is saying the plug did most of the damage when the plug isent what caused the piston to melt most of the people on here probably dosent know how or why a piston can melt and the information is somewhat correct but it is very poorly explained as to how and why the failure happened in the engine
you should listen to him
ive seen it you have a realy clean setup
you should listen to him
ive seen it you have a realy clean setup
Lol listen..... I know what im talking about. Ops setup was not finished. Hes running e85 with 80 s and don't have a upgraded pump or didn't have the reference fuel system. Then they put it in and didnt log it for me to tune. So there for it can be many things. I feel it was the plug, reasoning is I've seen this before on many other cars. Grounding strap breaks and gets squished within the wall of sleeve and piston. Or the fact the plugs were.misfiring causing washing of the wall which therefore caused the explosion to the piston. Melting, boom, same thing. Autolites are junk. And motocraft should throw them away..[/B]
Lol listen..... I know what im talking about. Ops setup was not finished. Hes running e85 with 80 s and don't have a upgraded pump or didn't have the reference fuel system. Then they put it in and didnt log it for me to tune. So there for it can be many things. I feel it was the plug, reasoning is I've seen this before on many other cars. Grounding strap breaks and gets squished within the wall of sleeve and piston. Or the fact the plugs were.misfiring causing washing of the wall which therefore caused the explosion to the piston. Melting, boom, same thing. Autolites are junk. And motocraft should throw them away..[/B]
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Joined: 12-13-11
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From: Wisconsin
Yes, the engine is getting built, and all the weak points that have been talked about so far are getting fixed, espically the fuel issues, and the spark plugs, probably have him go back to some NGK's, oh and a tune from chevycobaltss3, before its raced with the new engine.
lol
i would look into replacing that sleeve or you could end up with some carnage like in my sig photo and the sleeves are only 0.060 thick or get a zzp block
Yes, the engine is getting built, and all the weak points that have been talked about so far are getting fixed, espically the fuel issues, and the spark plugs, probably have him go back to some NGK's, oh and a tune from chevycobaltss3, before its raced with the new engine.
Lol I'm so confused. You guys plan on changing to a different Tuner after new engine?
Yes, the engine is getting built, and all the weak points that have been talked about so far are getting fixed, espically the fuel issues, and the spark plugs, probably have him go back to some NGK's, oh and a tune from chevycobaltss3, before its raced with the new engine.
Junior Member
Joined: 12-13-11
Posts: 420
Likes: 0
From: Wisconsin
Junior Member
Joined: 12-13-11
Posts: 420
Likes: 0
From: Wisconsin
Lol, oops, my bad, I meant have you.tune it before he goes out and races it, I like you tunes, I need to.stop being lazy and have you revise the one in my truck now that the low octane fuel is out of her,
Junior Member
Joined: 12-13-11
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From: Wisconsin
Started doing some work on carstedt's valve cover, waiting on parts to do everything else, so time for some look good stuff, had some left over orange paint from when we did his rims.
this is with no clear coat
two coats of clear, just sprayed it, still gonna do a few more,
this is with no clear coat
two coats of clear, just sprayed it, still gonna do a few more,
Junior Member
Joined: 12-13-11
Posts: 420
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From: Wisconsin