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[quote="BigAl"]Need help understanding the 5 min AFM mod.
The engine at a set rpm will draw in required amount of air (a)
The flap is set at a set resistance (r)
If you alter (r) to be lower, the same amount of air is going in, albeit at a slower rate, as the engine only sucks in what it wants but the flap position opens further, telling the ecu that more air is going in and so puts more fuel in.
I would assume this is true for the opposite, as in if (r) is increased then the same amount of air is being sucked in but at a higher rate as the flap position is restricted, telling the ecu that less air is going in so decreases the fuel.
How come when I had a play around with my flap, trying to put it back to original, I realised that I had increased (r) and definitely got better torque, ect ect?
The person who marked the toothed wheel prior to me owning the car had indeed loosened it, if he used the reference point of where the w clip holds the tooth in place. I put it back to normal reference point but it got better the more I tightened it?? :oops:  :cry: 
HELP!!![/quote]

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