View Full Version : Just a few questions,
Blk Mamba
05-16-2008, 05:21 PM
first please explain what the MAF does. Second does the proximity of the MAF to the throttle body make a difference. Third other than the throttle body what controls the volume of air that can enter the throttle body (IE restrictions)? Fourth are different MAF sensors available? The reason I'm asking these stupid questions is I'm planning on building my own air-box to gather more air, and in addition to increasing the size of the throttle body, I need to know what other restrictions I may face.
Local Boy
05-16-2008, 08:00 PM
I'll help you out Brutha...
In order of your questions:
1. Your MAF measures the amount of air passing into the TB, so that your ECM can calculate the correct timing and fuel curves...It does this by heating up the little wires you see on the inside...Your ECM applys a specific electrical current thorough this wire, heating it to a specific temp. The manner in which this heating element is cooled by the incomong air is calculated by the ECM... Resulting in adjustments made to the timing and fuel curves...and your car runs as efficiently as possible...
2. It only makes a difference if it is blow through type or a suck through type...Each type needs to be calibrated correctly to your specific application...
3. Your TB is responsoble for allowing specific amounts of air to enter the intake...It also is a point of reference for your ECM, regarding your throttle angle...Any, and all, restrictions in the air intake path will affect how much air is available to enter the TB...
4, Yes, there are a variety of different sized MAFs...Every MAF has it's limitations...They only can calculate so much air before they "peg" out...People will go with a bigger MAF when the air they are flowing surpasses the capability of the MAF...
5. Regarding the TB...You can up-grade to a Accufab or BBK TB...But this alone will not net you any really noticable gains. Unless you go S/C'ed this mod is considered a "bling" mod...
Hope this helps...
ALOHA
FordNut
05-16-2008, 09:56 PM
2. It only makes a difference if it is blow through type or a suck through type...Each type needs to be calibrated correctly to your specific application...
I know of one instance where the position of the MAF relative to the throttle body made a big difference in how the car ran. There was a flex tube connecting the two. When the MAF was at the airbox the car ran bad, but when the MAF was moved to connect directly to the throttle body and the flex tube connected the MAF to the air filter the problem was fixed. It appears that the connection between the MAF and throttle body needs to be at least somewhat rigid. Otherwise, I believe the distance shouldn't matter.
Blk Mamba
05-17-2008, 03:10 PM
So if I fabricate a port for the MAF right next to the TB, and increase the size of the TB it will work? I'm going to try to grab as much air as I can from anywhere I can. (wheel wells, under the bumper, cowl style hood, all plumbed to an aluminum air box.)
Local Boy
05-17-2008, 03:46 PM
HMMM...
Assuming you are N/A...it could work...But remember, that the MAF needs to be oriented at the 12 'o clock position...and like FordNut said, it has to be rigid enough so it won't contort at WOT...
What concerns me is the speed of air changes (faster) the closer you put the MAF to the TB...
This may pose a problem...I don't know...I would venture to guess that the speed at which the air flows past the MAF, would affect the readings the ECM recieves...
Because of this, I would have it dyno'ed to be sure, your invention does not produce less than accurate readings, and thus contribute to engine failure...
Ironic, that I'm thinking of the same thing, but going about it, in a very different direction...
I'll be fabing up my idea this weekend...
Good Luck...
ALOHA
Blk Mamba
05-17-2008, 04:03 PM
But you just got "blown" didn't you? You should need no more air. And yes I am NA. Thank You both, and good luck to you also.
Local Boy
05-17-2008, 04:17 PM
Thanks Trash...
Yeah...lol...
My intent is to reduce underhood temps, in an effort to further reduce my IAT's...
Let us know how it turns out...
ALOHA
Blk Mamba
05-17-2008, 04:23 PM
I'm going to use a cowl hood to suck air thru the underhood area, and reduce engine heat build up, and suck air to the engine from everywhere else.
Local Boy
05-17-2008, 04:38 PM
That sounds like a cool set up...
Please post up some pics, when it's done...
Wishing you the best, Brutha...
ALOHA
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