collecting data for different air cleaners, help appreciated
Administrator
Joined: Apr 2010
Posts: 87,465
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From: Clayton MI
I hear ya on that one. It has been unbearable up here lately...... and my truck hates it too. If it is 90* or above, it runs crappy, doesn't wanna shift, and generally is a drag to drive. Temp drops to 89*..... runs/drives just fine.
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Legend
Joined: Jul 2007
Posts: 7,843
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From: DFW, Texas
Grand Champion
Joined: Nov 2004
Posts: 6,099
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From: Colorado
correct formula for density of a solid.air is not a solid its a gas.one would need to ad in the ideal gas law when calculating VE tables.P*V = n*R*T.combining both equations you get density=P(pressure)/R(GAS/constent)*T(TEMP).speed density VE TABLES will be N(estimated)=PV/RT.VE table are calculated using this equation.VE tables are not the only thing that controls the fuel.you have heard the saying "hot air rise's".density,volume,mass are not all the same.MAF sensor is MASS air flow.not volume air flow.anyway cold air is free horsepower anyway you slice it
Yes, my bad you are correct. Density of air = pressure / (specific gas constant x temp).
However, I still contend (from my own experience) that our PCM's care more about MAP then about temp because I have had my IAT fail, and the truck only exhibited difficulties at cold start up, then some minor surging the rest of the time. Other then that, it ran fine.
I agree, cold air is free horsepower, but unfortuntaly on our trucks, it isn't much and you have to have significantly colder air to really make a difference due to the issues mentioned above and the fact that we utilize a plenum volume intake rather then a direct port intake.
Banned
Joined: Jul 2010
Posts: 123
Likes: 1
Yes, my bad you are correct. Density of air = pressure / (specific gas constant x temp).
However, I still contend (from my own experience) that our PCM's care more about MAP then about temp because I have had my IAT fail, and the truck only exhibited difficulties at cold start up, then some minor surging the rest of the time. Other then that, it ran fine.
I agree, cold air is free horsepower, but unfortuntaly on our trucks, it isn't much and you have to have significantly colder air to really make a difference due to the issues mentioned above and the fact that we utilize a plenum volume intake rather then a direct port intake.
However, I still contend (from my own experience) that our PCM's care more about MAP then about temp because I have had my IAT fail, and the truck only exhibited difficulties at cold start up, then some minor surging the rest of the time. Other then that, it ran fine.
I agree, cold air is free horsepower, but unfortuntaly on our trucks, it isn't much and you have to have significantly colder air to really make a difference due to the issues mentioned above and the fact that we utilize a plenum volume intake rather then a direct port intake.
Veteran
Joined: Jul 2010
Posts: 263
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From: cocoa beach, fl
i have built alot of high performance vehicles in the past, and my experience shows that you have to seperate the air cleaner from the engine bay with a physical divider. the stock unit (at least i my truck) does have that but it still sucks the hot air from inside the engine bay.
my plan is to build a functional ram air hood that internally plumbs to a high flow filter that sits in an enclosure sealed of by the closing of the hood.
i simply make a "door" in the side of this enclosure with a linear actuator on it. if it starts raining i flip a switch and the door opens so it sucks the dry air out of the engine bay.
a simple screen water trap will trap 99.99 percent of water vapor coming in. i have used this setup on three custom air intakes i have made. worked great, and imho the best and most user friendly way to get truly colder air for the truck to breath.
my plan is to build a functional ram air hood that internally plumbs to a high flow filter that sits in an enclosure sealed of by the closing of the hood.
i simply make a "door" in the side of this enclosure with a linear actuator on it. if it starts raining i flip a switch and the door opens so it sucks the dry air out of the engine bay.
a simple screen water trap will trap 99.99 percent of water vapor coming in. i have used this setup on three custom air intakes i have made. worked great, and imho the best and most user friendly way to get truly colder air for the truck to breath.