Intake Theory????
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From: COLORADO SPRINGS, CO USA
Intake Theory????
It seems to me that adding any type of free flowing intake would end up being a waste. I am looking for someone to clarify this for me, not knocking the addition of a free flowing intake. I have a JET Powrflo filter and removed the snorkel to the fender on the air box. I can't say that I feel any difference in power or mileage.
My theory is this, on a computer controlled EFI engine, the MAF sensor is metering the amount of air that is avail, along with the temp. It then feeds that to the ECM and the proper air/fueld mix is calculated. Does the MAF actually read that more air is avail or does it determine the amount of air needed for a certain RPM? If it does the later, then a free flowing intake would cause a lean condition, yes or no? I am thinking of opening up the stock air box and the silencer, but am not convinced it is even worth messing with. Can anyone enlighten me on this subject.
Thanks in advance.
My theory is this, on a computer controlled EFI engine, the MAF sensor is metering the amount of air that is avail, along with the temp. It then feeds that to the ECM and the proper air/fueld mix is calculated. Does the MAF actually read that more air is avail or does it determine the amount of air needed for a certain RPM? If it does the later, then a free flowing intake would cause a lean condition, yes or no? I am thinking of opening up the stock air box and the silencer, but am not convinced it is even worth messing with. Can anyone enlighten me on this subject.
Thanks in advance.
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From: Humble, Texas
You meant to say ECU right?
Your ECU calibrates and compensates for any additional air flow that is marginal to the degree that an intake adds; as same as a free'r flowing exhaust.
By adding a FIPK, yes you are adding more air, but you are also increasing the velocity of the air by reducing the turbulence in the intake path.
Your ECU calibrates and compensates for any additional air flow that is marginal to the degree that an intake adds; as same as a free'r flowing exhaust.
By adding a FIPK, yes you are adding more air, but you are also increasing the velocity of the air by reducing the turbulence in the intake path.
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Joined: Mar 2002
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From: SE Texas
The MAF sensor will show an increase in air flow, which the PCM compensates w/ more fuel.
If your air filter is in the engine compartment, it will be sucking hot air. Anything above 140F the pcm retards timing.
Unless you change the volumetric efficiency of the engine(bigger valves, pistons and super charger/ turbo) the air filter is kinda redundant.
Just my $0.02
If your air filter is in the engine compartment, it will be sucking hot air. Anything above 140F the pcm retards timing.
Unless you change the volumetric efficiency of the engine(bigger valves, pistons and super charger/ turbo) the air filter is kinda redundant.
Just my $0.02
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Joined: Mar 2002
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From: College Station, TX
Well, I wouldn't go *that* far ...
The whole concept of ramping up an engine is based upon the air intake. How much air you can get into the engine dictates how much power you will have at the wheels. When you change your air filter out for an aftermarket kit (or perhaps just a filter change), you are removing a restriction in the air flow. Hopefully the change will cause more air to flow, and if you can, cooler air as well. This is because cooler air compresses more than hotter air, and it means there's more oxygen.
In any case, the MAF is constantly reading the amount of oxygen flowing into the engine and sending the data back to the ECU. If more oxygen (read as: more air) flows in to the intake, then the ECU will increase the fuel to maintain the perfect 14.7 ratio. This means that you have more fuel in your cylinder when the plug goes off, creating a bigger explosion.
With regards to FIPKs, they really don't help all that much. In ideal conditions, with your hood up and a huge fan blowing cold air at your engine, you can get a good power increase. However, driving around in 80 degree weather with your hood down (do you know anybody that drives with the hood up? Tell them they are stupid if they do), the actual increase is on the order of 2 or 3 hp to the rear wheel. Not all that much ...
I could talk for much longer about all of this theory if you'd like ... I just don't want to make this post longer than a page =). Hope this helps!
Tim
The whole concept of ramping up an engine is based upon the air intake. How much air you can get into the engine dictates how much power you will have at the wheels. When you change your air filter out for an aftermarket kit (or perhaps just a filter change), you are removing a restriction in the air flow. Hopefully the change will cause more air to flow, and if you can, cooler air as well. This is because cooler air compresses more than hotter air, and it means there's more oxygen.
In any case, the MAF is constantly reading the amount of oxygen flowing into the engine and sending the data back to the ECU. If more oxygen (read as: more air) flows in to the intake, then the ECU will increase the fuel to maintain the perfect 14.7 ratio. This means that you have more fuel in your cylinder when the plug goes off, creating a bigger explosion.
With regards to FIPKs, they really don't help all that much. In ideal conditions, with your hood up and a huge fan blowing cold air at your engine, you can get a good power increase. However, driving around in 80 degree weather with your hood down (do you know anybody that drives with the hood up? Tell them they are stupid if they do), the actual increase is on the order of 2 or 3 hp to the rear wheel. Not all that much ...
I could talk for much longer about all of this theory if you'd like ... I just don't want to make this post longer than a page =). Hope this helps!
Tim
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From: Windsor,Ontario,Canada
The little 2-3 HP at the the wheels as was mentioned will be added to the next mod and so on and so on. Every little bit helps. Adding a FIPK or any other brand will add HP. I will not debate how much as I don't care while I am making this point. If you then add a chip your potential increase is greater with the FIPK than it would be without the FIPK. In what order or what you do to your engine is for you to decide. What ever mods you do to your engine the more you do, the more potential power you will make.
Regards
Jean Marc Chartier
Regards
Jean Marc Chartier
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Joined: Jun 2002
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From: Oklahoma
I think
I think it does make a diffference and it adds up. The best that I have seen from this is a guy on a different sight named gary. He has a larger MAF, TB, and fliter and housing with a Super charger and he has about 380 HP I am sure he has more tricks under there but I think you get what I am saying. you can keep it stock or make a hot rod it is your chioce. Hey I have even changed to a synthetic oil because of a 3 hp gain.