Why?
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Originally posted by KJ
they broke because of how long you were spraying. The intake valves have the cool air flowing over them due to the relatively cool intake charge (real cold since you were spraying) and the heat from the combustion cycle heats them up. This hot cold temperature cycle going on for a full minute will fatigue the intake valves until they break. I'd also bet some exhaust valves are also burnt and should all be checked and/or replaced. That is my theory anyways.
they broke because of how long you were spraying. The intake valves have the cool air flowing over them due to the relatively cool intake charge (real cold since you were spraying) and the heat from the combustion cycle heats them up. This hot cold temperature cycle going on for a full minute will fatigue the intake valves until they break. I'd also bet some exhaust valves are also burnt and should all be checked and/or replaced. That is my theory anyways.
Rockin' 4 more Cylinders
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Originally posted by KJ
they broke because of how long you were spraying. The intake valves have the cool air flowing over them due to the relatively cool intake charge (real cold since you were spraying) and the heat from the combustion cycle heats them up. This hot cold temperature cycle going on for a full minute will fatigue the intake valves until they break. I'd also bet some exhaust valves are also burnt and should all be checked and/or replaced. That is my theory anyways.
they broke because of how long you were spraying. The intake valves have the cool air flowing over them due to the relatively cool intake charge (real cold since you were spraying) and the heat from the combustion cycle heats them up. This hot cold temperature cycle going on for a full minute will fatigue the intake valves until they break. I'd also bet some exhaust valves are also burnt and should all be checked and/or replaced. That is my theory anyways.
yeah i was spraying tilll like 5thi gear when my shit happen...
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Honda Tech/ Local AssHole
Joined: May 2003
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"Floating a Valve"
Terminal Velocity... A object can only stay in motion for so long increasing speed so fast before the molecular or composite materials Freeze Motion.
English means The spring is rated to push the valve closed only so fast, once the cam overtakes the speed of the Springs capacity to be sprung the valve stays in one direction.. down, once down the piston Hits the valve breaking the valve or worse shoves it through the piston when spraying.
Why things break when you spray. N20 is Sub Freezing when expanded. A engine internally runs around 200 degrees +. When N20 is sprayed into a heated combustion chamber the expanded gas's freeze the metals persay, but intern SOFTEN the metals. To much spray and you "burn" holes in your pistons melting them. A valve Being bent is what occurs the breakage happens when something mechanically hits the valve and breaks it. LIke i think KJ said The cycle of HOT COLD cycles breaks down the molecular strength of the metals in the engine weakening the components. Exhaust Valves like stated go first die to the heat since they dont see any cold N20/Air mix, it just gets Super Heated Exhaust. Intake Valves 99% of the time bend when sprayed and are broken uppon impact of the Cam lob or The piston. Cylinder Wallsalso give way like this Softened Metal and "Burns" holes in the cylinder wall.
I hope i Helped and didnt confuse ya !
Terminal Velocity... A object can only stay in motion for so long increasing speed so fast before the molecular or composite materials Freeze Motion.
English means The spring is rated to push the valve closed only so fast, once the cam overtakes the speed of the Springs capacity to be sprung the valve stays in one direction.. down, once down the piston Hits the valve breaking the valve or worse shoves it through the piston when spraying.
Why things break when you spray. N20 is Sub Freezing when expanded. A engine internally runs around 200 degrees +. When N20 is sprayed into a heated combustion chamber the expanded gas's freeze the metals persay, but intern SOFTEN the metals. To much spray and you "burn" holes in your pistons melting them. A valve Being bent is what occurs the breakage happens when something mechanically hits the valve and breaks it. LIke i think KJ said The cycle of HOT COLD cycles breaks down the molecular strength of the metals in the engine weakening the components. Exhaust Valves like stated go first die to the heat since they dont see any cold N20/Air mix, it just gets Super Heated Exhaust. Intake Valves 99% of the time bend when sprayed and are broken uppon impact of the Cam lob or The piston. Cylinder Wallsalso give way like this Softened Metal and "Burns" holes in the cylinder wall.
I hope i Helped and didnt confuse ya !
i stepped on my weiner!
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as far as i knew you couldnt "float " a honda valve, because they arent hydraulic or push rod operated.....
the theory sounds correct but because we have so little roatating mass in our valvetrain, i didnt think it was possible........i have revved B16s with stock valvetrain to over 10 grand before, with spray on a JR supercharger and i only ever lost one retainer, unfortunatley it went ionto the blower and locked it up!!!!!!!!!
sucked for me
the theory sounds correct but because we have so little roatating mass in our valvetrain, i didnt think it was possible........i have revved B16s with stock valvetrain to over 10 grand before, with spray on a JR supercharger and i only ever lost one retainer, unfortunatley it went ionto the blower and locked it up!!!!!!!!!
sucked for me
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owner/operator
www.tdcperformance.net
Honda Tech/ Local AssHole
Joined: May 2003
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Originally posted by NChatch
as far as i knew you couldnt "float " a honda valve, because they arent hydraulic or push rod operated.....
the theory sounds correct but because we have so little roatating mass in our valvetrain, i didnt think it was possible........i have revved B16s with stock valvetrain to over 10 grand before, with spray on a JR supercharger and i only ever lost one retainer, unfortunatley it went ionto the blower and locked it up!!!!!!!!!
sucked for me
as far as i knew you couldnt "float " a honda valve, because they arent hydraulic or push rod operated.....
the theory sounds correct but because we have so little roatating mass in our valvetrain, i didnt think it was possible........i have revved B16s with stock valvetrain to over 10 grand before, with spray on a JR supercharger and i only ever lost one retainer, unfortunatley it went ionto the blower and locked it up!!!!!!!!!
sucked for me
you are correct. but Honda valves tend to break or "float" due to excessive force constant RPM pounding. a Spring can be collapsed and float valves.
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Breaking and floating are completly different. They also tend to float under HIGH RPM. Not low constant RPM. Breaking happens from excessive heat, and/or pistons smacking them. Springs allow the valves to float, because they are forced to expand and collapse faster and/or harder then they are able to compensate for. So they get weaker, and allow much more travel then they normally would. Which is why we upgrade our valvetrains.
Honda Tech/ Local AssHole
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Originally posted by Cronic
Breaking and floating are completly different. They also tend to float under HIGH RPM. Not low constant RPM. Breaking happens from excessive heat, and/or pistons smacking them. Springs allow the valves to float, because they are forced to expand and collapse faster and/or harder then they are able to compensate for. So they get weaker, and allow much more travel then they normally would. Which is why we upgrade our valvetrains.
Breaking and floating are completly different. They also tend to float under HIGH RPM. Not low constant RPM. Breaking happens from excessive heat, and/or pistons smacking them. Springs allow the valves to float, because they are forced to expand and collapse faster and/or harder then they are able to compensate for. So they get weaker, and allow much more travel then they normally would. Which is why we upgrade our valvetrains.
Honda Tech/ Local AssHole
Joined: May 2003
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Originally posted by Cronic
I have a friend who has a 1.5, he floated a valve, and it didn't break. Car ran like shit tho.
I have a friend who has a 1.5, he floated a valve, and it didn't break. Car ran like shit tho.
he obviously wasnt revving it too hard. if you "float" collapse in a honda a valve you tend to break them when the piston smakcs the valve unless it did close just not all the way. He got lucky but ive never seen a car without any damage when floating a val;ve.
