Originally Posted by Automatic 51

Just when i was thinking i had a handle on this whole project.... Haha.

Originally Posted by Green_Bandit

Oh! I didn't know you had success with it 03. Andy if I were you I'd do a little at a time. I promise you, you don't want to jump into ecuflash with a ton to tweak while learning.

Go with the stock maf first and get the simple things in check then go for the more involved things. Maf scaling is going to be long and a pain while burning a lot of gas. Tuning is not going to take a month, 2, or 3. 03 said two years. This whole time I've been tweaking mine and still have some to go AGAIN due to the change in spool thanks to more preload.

Tuning is the "fun" part of this whole thing.

Originally Posted by RoadSpike

That is only partially correct. The maf's in these cars are karmen vortex based. They measure airflow based on pressure waves kind of like looking at a flag in the wind and seeing how fast it flaps back and forth as a measure of airflow.

They do this by straightening the air, well sort of straight, with the grid in front then basically put a stick or rod in the middle of it. The air current eddies like water forming pressure waves which it measures either with a pressure sensor or something else which reads the pulses formed. They take the number of pulses and multiply it by the size of the pipe and you get a number you can use for airflow.

As you might imagine any tunneling of airflow say from a S bend in the air stream greatly effects this sensor. This is especially true when you look into one and see the tiny circle like thing that is the sensor. If air swirls a bit or tunnels past it then you can get readings that are too lean, or too rich, and mostly incorrect.

In the evo at least its widely noted that certain intakes and filter shapes greatly effect the numbers you get out of the maf. For the evo at least the HKS filter with its S shape and mushroom filter seemed to cause the maf to experience periods of super high readings followed by lower than normal ones depending of the airflow speed. With advent of air filter mods it was noted that the KN filter with its closed end and open sides provided wildly erratic readings while a filter with open sides and a conical open end piece provided smooth airflow and normal readings.

Originally Posted by andy2964

My intake tube is being built for maf setup and have about 3 weeks at most the get it up and running properly, or at least drive able since I know fine tuning will take a much longer. Sound reasonable?

Originally Posted by 03lances

Absolutely. Within a week I had a reasonable tune on mine quite well enough to just drive for sure and creep a little into boost. After the first month I was boosting happily and wasn't listening for any little noise lol, but it was far from done.

Originally Posted by Green_Bandit

2 options. Either find an O2 extender which I looked into but couldn't find the right one or you're going to have to cut, extend, and solder the OEM wires. Do not cut the wires on the sensor side.

Iirc demon said you can actually extend the wires by unraveling the loom a little and not have to cut. If you're feeling froggy give that a shot.

Originally Posted by link62

i opened the wire loom a bit and my o2 runs between the turbo and block just fine