fc3s.org

I have an AFM from a 13B-RE TT Comso engine sitting in the garage and I think I am going to play with it Anyone ever tried it on a S5 N/A or TII application? The AFM plug is the same as the S5 harness, but it is quite a bit larger than both stock ones for the FC. I guess there is only one way to find out, but I figured I would probe here first.

Evil Aviator

Well don't just sit there at your computer; break out the multimeter and see what you get!

fc3s.org

LOL, I will but I need some time to do it. I might get into it this weekend. I am still in the middle of redesigning the website so time is limited. That's why I wanted to do some probing first

Cheers!

DO IT!

WE WANT LOTS OF PICS!

(oh btw and a write up too)

=D

fc3s.org

Well the cool thing is, that if it works, and there is an improvement it would be a really cool and easy modification. Plus I can get those in pretty easy with my J-Spec engines I will let you guys know what I find.

mazdaspeed7

If it works, Ill do a before and after dyno for you...

NZConvertible

That's a hot-wire AFM. They're completely different to a flapper type, and require completely different code in the ECU. I highly doubt this'll work, and would require pretty tricky custom electronics if it could. And as Evil Aviator has mentioned a few times, you'd still be stuck with the POS stock ECU.

HWO

NZ - S5 is a hotwire type, S4 is a flapper type.

I would have thought the 13BRE would have run off map sensor like the 13BREW motor

fc3s.org

The RE one is just like the cone ones on the S5's, but bigger

And on a stock street car, the stock ECU will do just fine

Suds7

Send me one...
How much would you charge for one? If they are both hotwire then you are correct about the RE being a large S5

mazdaspeed7

IT IS NOT A HOT WIRE AFM!!!!!!!!!!!!!!!

Its just like the cone-type in all S5 cars. It plugs right in, and the car should run fine. I believe its the same AFM as on the US market 929(or 626, I dont remember which) from 92 to 96(again, I dont remember for sure, its been a while since I checked into this)


BTW, if he sells it, I already have first dibs on it. I talked to him about it long before this thread started

NZConvertible

The S5 is a sliding cone type, not hot-wire. Both the JC Cosmo engines (13B and 20B) use AFM's. Why Mazda decided to use MAP sensing for the FD instead is anybody's guess.

HWO

because MAP sensor set up is superior to AFM

I dunno why i somehow types in hotwire type, i have seen S5 AFM's and know that are the sliding type.

20B AFM's are flapper type aren't they cause i know somoene who is toying with putting a pair of S4 ones in to replace their stock ones

NZConvertible

Well you learn something new every day! That's a bit of an assumption. It may plug straight in, but it would be a million to one shot that its airflow/output characteristics happen to exactly match those of the FC's AFM. It's safe to say it will have an affect on how the engine runs (richer or leaner), but the only way to know how much and in which direction would be from before and after testing and measurement.
An educated guess would be that because the same airflow volume would move slower through the bigger AFM, it'll displace the cone less. If the displacement/resistance relationship for the FC and Cosmo AFM's is similar (it might not be), the the ECU would interpret this as less air than the old AFM did, so it's inject less fuel and you'd run lean. If you have an S-AFC you could tune the bigger AFM to match the ECU.

Dave, I say try it, but be careful.

BlaCkPlaGUE

lol, sorry to bring this back from the dead. But whatever happened to the outcome of this project???

Relisys190

iTrader: (4)

I'm having trouble remembering what an Air Flow Meter does


Get that Meter goin'

BlaCkPlaGUE

Eh, as far as I understand a fuel injected engine system, all the sensors do just one thing, fuel controll. So I think the question that im having here is if the car is going to lean out or richen using the RE afm in the low and high rpms?? Just curious..