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In Reply to: Re: STAN posted by franklin on January 15, 2002 at 00:25:06:
However you do it, ditching the AFM greatly improves the engine's output and feel. High specific output motors such as the AFM are disproportionately affected by the AFM. It's an early 80s engine management sensor.
MAF, or A-N, or A-N plus MAP (what I am doing via a Link Electrosystems AFM/Link, more forgiving than straight A-N) all remove or greatly reduce the part and full throttle restriction of the AFM.
In my case I tuned the fuel in accordance with a tuned intake (sorta like the Honda guys use from AEM or Injen)so I am getting more torque down low than a MAF conversion using the factory airbox. Then MAF approach is a it trickier than MAP or A-N/MAP or A-N strategies cuz it measures air without caring about direction..you can have some turbulence throw off the measurement or measure the same air twice with big cams due to reversion. For example it's often not such a good idea to slap a cone filter on the end of a MAF. And why they often use screens or grids to straighten out the air.
Having said that, for most folks a MAF approach is best cuz they are available, come with settings good enough to operate the car until you can dyno it, and they partially self adjust to mods and engine wear. A-N adjusts to some extent but not nearly as much and A-N not at all. With the cyntex A-N you just add a TPS and chip. But you MUST use it on a motor in good condition (verified) with the same mods the chip is intended for. And even then you can't quite get the low load/low rev resolution of othjer approaches. Motorsport raced the S14 with A-N and likely mapped at each track as they went along.
Stan
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