and with the portet tb did you just match port it to the intake manifold?

 

I figured it was for really cold environments so the TB blade wouldent freeze shut.. but who knowz

 

My LTrims went from about +2.5 to +4......that would make some change in WOT but where I'm noticing the larges gains are at part throttle acceleration (before you go into PE).

My camaro has not had a screen in its MAF for 3 years now (I tossed the stock MAF in the trash not long after I got the car) and its mods make the truck look like a scooter



it helps head the air up in cold whether so the fuel can atomize better and improve cold start fuel economy.......if the blades froze shut (which would happen with the engine off and cold), you would never get it open because the TB has to open to adjust for idle (drive by wire = no IAC motor) and with no idle you can't heat up the water to heat up the TB



I did that also, but I the main work was to port and polish the TB its self (like you would a head). It has LOTS of ridges and ledges (FAR more than my F-body TB had) and I smoothed the entrance up to the blade so there would not be turbulence. I also cut the screws that hold the blade in shorter (they are too long and stick out the back).

 

Sounds like you know what your doing as far as tuning so you can just tune for the MAF when the time comes.

I wish I had my screen to put back in, im running rich

 

Removing the screen usually makes you go lean because the MAF will read less air than is really going into the engine.

 

Why would it read less air? Dosent the MAF read up to like 60lb/min?
With that theory... wouldent having something like a supercharger really mess things up?

From what ive read the screen is there to keep the air from being turbulant.

Im a/f is about 12.4 and I wanna be more around 13

 

The MAF is calibrated for a given amount of flow and by the screen keeping the air straight, it helps that calibration. When you remove that screen and increase the actual flow, but the elements that "read" the flow still only reading what flows over them (not the total....its like looking through a pin hole to see the world). Air that flows in other areas of the MAF does not get read. So now you have more flow in different areas and that air that does hit the elements is not straight so it does not give an accurate reading.

 

Interesting stuff! I was wondering what the screen did. How do you know what kind of power you are getting if the flow is not straight and only some of it is read? It seems like mine is more powerful but I have no numbers.

 

A screenless maf is going to throw the computer off no matter what you say, that is unless you have tuned for it. Its there for a reason and that is what the Stock PCM is calibrated for.

I ran a screenless maf with mild mods on my TA and it ran pig rich.

 

Sorry man but that makes NO sense. If you take the screen out, it flows more air yes. But the sensors sense that. You arnt fooling the sensors