Air intake mixture question
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Air intake mixture question
Assuming you are driving your H3 under normal circumstances, let's say around 60 to 70 degrees or so, which scenario would be most true having a high air flow filter in a stock air box:
A) Adding more airflow, i.e. warm engine compartment air to the stock air box will give the engine MORE torque because of more air.
B) Adding more airflow, i.e. warm engine compartment air to the stock air box will give the engine LESS torque because of the warmer air.
C) Keeping the amount of airflow the same but having cooler air coming into the stock air box will make the truck have MORE torque then any improvement A) may have.
D) None of the above will change the torque levels at all of the engine unless you buy a true CAI kit.
I'm just curious to what you pros say because once I get my house I'm thinking about fabricating something (yes another one of my experiments) because I'll actually have the room for normal tools to be able to do the stuff I've always wanted to try.
A) Adding more airflow, i.e. warm engine compartment air to the stock air box will give the engine MORE torque because of more air.
B) Adding more airflow, i.e. warm engine compartment air to the stock air box will give the engine LESS torque because of the warmer air.
C) Keeping the amount of airflow the same but having cooler air coming into the stock air box will make the truck have MORE torque then any improvement A) may have.
D) None of the above will change the torque levels at all of the engine unless you buy a true CAI kit.
I'm just curious to what you pros say because once I get my house I'm thinking about fabricating something (yes another one of my experiments) because I'll actually have the room for normal tools to be able to do the stuff I've always wanted to try.
Joined: Apr 2006
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RE: Air intake mixture question
Dennis is right, colder the air the better, plus I also think that one of the major gains from the CAI kit is replacing the ribbed plastic piping from the throttle body to the airbox. Less turbulant the better also.
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RE: Air intake mixture question
ORIGINAL: importkiller
Less turbulant the better also.
Less turbulant the better also.
Joined: Apr 2006
Posts: 7,253
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RE: Air intake mixture question
this was taken right from the airaid website
so it doesn't creat turbulance to the air but rather spins the air kinda like a tornado funnel.
The POWERAID® TBS concept was developed to enhance mid-range power, torque and fuel efficiency. The unique dyno-proven "Helix Bore" of the POWERAID® TBS causes a spinning action of the incoming air-charge as it passes through the throttle body. This extremely beneficial air-charge carries all the way into the combustion chamber, producing a super-atomized mixture, which produces tremendous gains in mid-range power and overall efficiency. This is the key element to the horsepower success behind each POWERAID® TBS
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RE: Air intake mixture question
This is actually a tough question. The simple answer is what ever gets you more molecules of O2. Your engine sucks in a volume of air not a mass. The density of the air will determine the amount of O2. For a given airbox, as your engine sucks in warmer/less dense air, you have less O2, your PCM will command less gas, and you'll make less power. The old rule is for every 10 F increase in air temperature you make 1% less power.
The problem comes in when you suck in warm engine compartment air with a new intake. Now you engine sucks in air easier (less restriction) but sucks in less dense air. The other issue is how well the PCM is tuned to handle the warm air in the timing advance.
I've tested a couple aftermarket systems and several of my own design, all of them did better than the stock air box even though some were breathing warmer air. The biggest slug of hot air comes just after sitting at a red light for a minute.
The problem comes in when you suck in warm engine compartment air with a new intake. Now you engine sucks in air easier (less restriction) but sucks in less dense air. The other issue is how well the PCM is tuned to handle the warm air in the timing advance.
I've tested a couple aftermarket systems and several of my own design, all of them did better than the stock air box even though some were breathing warmer air. The biggest slug of hot air comes just after sitting at a red light for a minute.
Joined: Sep 2006
Posts: 145
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RE: Air intake mixture question
here is a quote from Amsoil on CAI's.
More Cold Air = More Horsepower
The basic purpose of the air intake system is to bring cool air from outside the engine compartment into the engine. The cooler air is denser than the air found within the hot engine compartment. The denser charge contains more oxygen than warmer air, providing better combustion through a more effective air/fuel mixture.
Another advantage of most specialty-equipment cold air intakes is their consistent diameters and the absence of sharp bends, both of which help to eliminate turbulence in the air stream.
The basic purpose of the air intake system is to bring cool air from outside the engine compartment into the engine. The cooler air is denser than the air found within the hot engine compartment. The denser charge contains more oxygen than warmer air, providing better combustion through a more effective air/fuel mixture.
Another advantage of most specialty-equipment cold air intakes is their consistent diameters and the absence of sharp bends, both of which help to eliminate turbulence in the air stream.
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RE: Air intake mixture question
ORIGINAL: ChevyHighPerformance
This is actually a tough question. The simple answer is what ever gets you more molecules of O2. Your engine sucks in a volume of air not a mass. The density of the air will determine the amount of O2. For a given airbox, as your engine sucks in warmer/less dense air, you have less O2, your PCM will command less gas, and you'll make less power. The old rule is for every 10 F increase in air temperature you make 1% less power.
The problem comes in when you suck in warm engine compartment air with a new intake. Now you engine sucks in air easier (less restriction) but sucks in less dense air. The other issue is how well the PCM is tuned to handle the warm air in the timing advance.
I've tested a couple aftermarket systems and several of my own design, all of them did better than the stock air box even though some were breathing warmer air. The biggest slug of hot air comes just after sitting at a red light for a minute.
This is actually a tough question. The simple answer is what ever gets you more molecules of O2. Your engine sucks in a volume of air not a mass. The density of the air will determine the amount of O2. For a given airbox, as your engine sucks in warmer/less dense air, you have less O2, your PCM will command less gas, and you'll make less power. The old rule is for every 10 F increase in air temperature you make 1% less power.
The problem comes in when you suck in warm engine compartment air with a new intake. Now you engine sucks in air easier (less restriction) but sucks in less dense air. The other issue is how well the PCM is tuned to handle the warm air in the timing advance.
I've tested a couple aftermarket systems and several of my own design, all of them did better than the stock air box even though some were breathing warmer air. The biggest slug of hot air comes just after sitting at a red light for a minute.