Yeah, I assume these cars are running blow-through MAFs (i.e. after the compressor), which are more tricky to calibrate. I wish cars just used MAP metering instead, it's so much easier to work with. I think Hondas use MAP, or at least I believe my old S2000 did. I converted my STi to MAP after going rotated turbo because the MAF was a nightmare to calibrate with my 4" inlet.

hehehehehehe! this kit's MAF sensor is before the compressor!

It's the other way around. Drawn through is before the supercharger, blown through is after the supercharger before the throttle-body (Stillen = Drawn, GTM = Blown).

Why not throw a MAP sensor in that manifold and call it a day?

there is already...it's in the rear of the manifold

MAF sensor is what we need. If there's any change in voltage or just a small amount of debris that gets on it, the car goes into limp mode. That's how fragile they actually are. Plus they're pretty expensive. We'll have to see what UpRev says.

From what I know, and correct me if I'm wrong please, MAP sensors' reposnse are more linear and can cover a wider range than a typical MAF sensor.

A MAP sensor also does not depend on orientation nor will obstruct flow, whereas in a MAF sensor, its placement and orientation is very crucial

To use a MAP (Manifold Absolute Pressure) sensor to determine air mass would also require a manifold air temperature sensor, and recoding of the ecu logic. Not a simple task by any stretch


From what I can see in data logs, that sensor doesn't read much above 0psi.

That's what I said regarding position--blow-through is after the compressor. However, I did not know that Stillen was draw-through. That may be part of the problem. If the IAT readings are way off then it would not surprise me if there were idle issues.

That's right. What would be nice is to take the IAT from the MAF along with a MAP meter and black-box it so that we got an equivalent 5V output which could be fed back to the ECU as a surrogate MAF reading i.e. spoof the MAF voltage using a MAP and IAT sensor. I imagine it would take quite a bit of mapping to get right, but getting rid of the MAF sensor would save a lot of headaches.

All I can say is whenever my IAT is above 90-120 my car drives like crap and detonation will show, in cooler climates it performs very very good!

I gotta ask. How about relocating the MAF sensors. THink that could help solve some issues?

It's in the works, unfortunately it's easier said then done. The way the piping is setup makes it next to impossible to evenly distribute air to each sensor.

why not put them right before the intake manifold? where pipe turns into two
Frank

right! you can't just put 2 MAF's on the single pipe. it's gotta be separate.

did you purchase the kit? i was really thinking about parting mines out seriously and of course you're the first i've got in my mind to sell.