Thread: What caused my melted piston?
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10-27-2009 10:19 AM28 F1 Pantera - Sit down and foot throttle | DPM Drive
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10-27-2009 10:25 AM
Why did it start to detonate in the first place... if you lose a plug the one cylinder just dies and gives no energy to ignite anything.
So what raised the cylinder temp up to detonation?
A loose plug itself doesnīt do that IMO because itīs a blown engine..it doesnīt suck air as the intake is pressurized so therefore the A/F ratios didnīt go lean until the temp of the combustion chamber got uncontrollable.Offshore Racing wasnīt designed to be a spectator sport, it's for people or companies with's lots of money to push the envelope of endurance technology and hopefully put a trophy on a mantle. It's man vs the elements, not like boats with like engines running in circles.
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10-27-2009 10:27 AMOffshore Racing wasnīt designed to be a spectator sport, it's for people or companies with's lots of money to push the envelope of endurance technology and hopefully put a trophy on a mantle. It's man vs the elements, not like boats with like engines running in circles.
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Offshore Racing wasnīt designed to be a spectator sport, it's for people or companies with's lots of money to push the envelope of endurance technology and hopefully put a trophy on a mantle. It's man vs the elements, not like boats with like engines running in circles.
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10-27-2009 10:37 AM
Detonation can loosen the Spark plug.... by itself.
Believe me on this one the loose plug is not the issue here Id say it got loose because the detonation gave a hit on the threads. Weīre talking of a 10 times pressure peak and force to the threads compared what they usually take.
Was it the first run after winter ?Offshore Racing wasnīt designed to be a spectator sport, it's for people or companies with's lots of money to push the envelope of endurance technology and hopefully put a trophy on a mantle. It's man vs the elements, not like boats with like engines running in circles.
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10-27-2009 10:38 AMOffshore Racing wasnīt designed to be a spectator sport, it's for people or companies with's lots of money to push the envelope of endurance technology and hopefully put a trophy on a mantle. It's man vs the elements, not like boats with like engines running in circles.
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10-27-2009 10:41 AMOffshore Racing wasnīt designed to be a spectator sport, it's for people or companies with's lots of money to push the envelope of endurance technology and hopefully put a trophy on a mantle. It's man vs the elements, not like boats with like engines running in circles.
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10-27-2009 10:43 AM28 F1 Pantera - Sit down and foot throttle | DPM Drive
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10-27-2009 10:49 AM
Beats me honestly... sometimes they just happen and that would be the only thing IMO that could do damage like that...unless you lost also an exhaust valve before meltdown which you didnīt ?
Offshore Racing wasnīt designed to be a spectator sport, it's for people or companies with's lots of money to push the envelope of endurance technology and hopefully put a trophy on a mantle. It's man vs the elements, not like boats with like engines running in circles.
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10-27-2009 11:07 AM
Two things not mentioned yet.. Water pressure less the 15 lbs is trouble. This should be closely monitored. Exhaust could have a pin hole in it. Not enough to collect and rust but, enough to change compression.
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10-27-2009 11:10 AMIf it was cooling, the valve would have tulip'ed badly.
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10-27-2009 11:10 AM
After 15 hours on the dyno what changed besides water pressure and exhaust ? Fuel?
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10-27-2009 11:11 AM
Valves looks good so no blowbyīs on the seats thatīs what I was after.
I stick with the air pocket issue.
Not an ignition crossfire like Daredevil hinted as a timing problem ?
Those seems to be the only 2 reasons which could lead to detonation IMO as the plug hasnīt blued or anyother part to speak of.Offshore Racing wasnīt designed to be a spectator sport, it's for people or companies with's lots of money to push the envelope of endurance technology and hopefully put a trophy on a mantle. It's man vs the elements, not like boats with like engines running in circles.
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- Join Date
- Oct 2008
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- Posts
- 193
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Offshore Racing wasnīt designed to be a spectator sport, it's for people or companies with's lots of money to push the envelope of endurance technology and hopefully put a trophy on a mantle. It's man vs the elements, not like boats with like engines running in circles.