what?
the resistance table I have is showing that it is very, very close?
I only went to 176F on the triumph.
Tested @68 *F (20c) = 2.27 Ohms
@176*F (80c) 0.29 - 0.35 Ohms

ours...Air temperature 68F--2.21--2.69
@140F..0.493--0 .667

maybe there are different triumph model iat"s?

 

Yeah, that sounds about right.

It ends up showing the wrong temperature values with the OE calibration table.

Sorry to burst your bubble.

I tried several different sensors, including the one you are talking about (as referenced on the RX-7 club). It just didn't work.

 

well it has taken a while but I have learned to listen --sometime.

 

well just read something that helped me understand this realtionship with the IAT. So I thought I would share in that it may help someone else.

"The MAF output frequency is a function of the power required to keep the airflow sensing element at a fixed temperture above the measured ambient"

It just clicked when I read that.
So in essence if the iat is "off" the frequency that the MAF is sending to the PCM will be "off" also.
It is NOT just a fail safe sensor. It is active at all times.
So once again, it is of high importance to get a post boost temperture reading.
I guess it would be a BIG job to try and tune without an accurate IAT?

 

That is a description of a Karmann/Bosch mass airflow meter. Ours is hot wire. That is a totally different system.

EDIT - OD, this is a question I must ask you and I really mean it sincerely and with no sarcasm:

Do you not read anything anyone else posts up here about this stuff? Do you really feel that you are operating in a vacuum and mining new territory?

OK, that was two questions.

 

MAF measures voltage not frequency.....that's one reason why the MAF's don't like being wet The water will make the wire really cool like a lot of air movement and it will run really rich

 

Sorry guys.
Truth of the matter is , I didnt search before I posted. I should have.
This stuff is tricky and I thought I had a small eureka moment, and I just posted up.
When it comes to my brain , I AM mining new territory. Bare with me.
I do have my stupid moments, but i dont give up easily so I may learn a few things....maybe?

Manual I have been reading must not have been proof read well.

 

Well, the MAF and IAT stuff is already pretty well sorted from both a mechanical/electrical perspective and a tuning one.

There are already several good discussions here about the function of the MAF and IAT as well as wiring diagrams that explain how to hook everything up so that there are no false readings or interference.

 

noted--thanks for the tolerance.
od out