Intake Air Temperature Data

[figgy]

I've scanned all the warm air posts again to try to find the one (I think there was one) which quoted some real world data for the actual intake air temperature sensor readings for the best mpg.

I think the person said the best zone was 75-85 degrees, but I can't find the post! Arrrrrr!!

Can the person who took these readings, or anyone else, post their numbers.

Specifically, what is the ideal window for lean burn?

Does Honda specify that anywhere?

Do we just have to guess?

Has it been tested?

Help!

[figgy]

p.s.

I stuck temp sensors on the rubber air hose just as it goes into the air filter box, and on the end of the air intake stock system (where the air first enters).

I insulated them, so they don't measure the outside air flowing over, but measure the hose and piping temps which eventually reflect the air temp since that is what is flowing over them - most accurately at the air filter box sensor.

If anyone has readings and comments on target temps for either of those positions, please let me know!

[Willie Williford]

Why don't you just buy an OBD tool and construct a temp. mount so you can measure the exact IAT from the sensor.

I've done that and monitor it a lot to see what is going on in different scenerios.

I use mine mostly for testing and research but can't give you any exact temperatures for a "stock" Insight as the TURBO heats up the intake air more than the radiator lines going through the intake throttle body.

[figgy]

Where does one get the OBD tool to read that data?

Sounds like a must have.

[Insightful Trekker]

Originally Posted by figgy

<snip>

:?: Specifically, what is the ideal window for lean burn? :?:

Does Honda specify that anywhere?

Do we just have to guess?

Has it been tested?

Help!

Only cause and effect from observation is known. And has been tested behind the wheel over many thousand of aggregate miles by several Insight owners.

The best temps are up to 120F via the IAT (Intake Air Temp) sensor. Usually read using an OBDII scanner. High humidity also seems to widen the lean burn window. In _extreme_ cold conditions it was reported that an electric hair dryer connected to warm the intake air had a visible MPG result.

There was an old thread in relation to these atmospheric conditions and aerodynamic drag. Such conditions theoretically also reduce said drag and are probably "visible" on the MPG indicator.

HTH! :)

[Willie Williford]

Figgy, the one I have is from http://www.autoxray.com in Tempe, Az.

[figgy]

Thanks!

[figgy]

I'm looking at the autoxray.com site, and there are a bunch of them that say they do OBDII and the prices differ by over $300 bucks.

What's the one to get?

figgy

Hi Figgy:

___I have to assume you own or have access to a Laptop. If so, why spend upwards of $700.00 when the scanner from OBD-II is only $122.00. I have had this scanner (it was Chisight’s) connected up to my own Insight and it works fantastic. They offer a “Group Buy” price although I don’t know what kind of discount that is as well and if you were interested, I would be more then happy to start one. I have a son at the U of I so the price is ~ $98.00 for me but I bet in a GB that it would cost ~ the same.

___Good Luck

___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___[email:1y76s39v]Waynegerdes@earthlink.net[/email:1y76s39v]

Hi Figgy:

___As an addition, Chisight mentioned to me that at ~ 75 - 80 degrees external ambient is where the AIT’s are optimal for maximum fuel economy IIRC. I believe there is an ~ 10 degree increase in AIT’s from external ambient across the radiator and through the air intake plenum with no radiator block or warm AIT installed. If this is the case, 90 degree AIT’s may be the best for lowest fuel consumption but I cannot conform this. Post a message to the Yahoo Honda-Hybrid forms and I am sure he will see it as he does post there every once in a while. His nick is again, “Chisight”.

___Good Luck

___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___[email:1hhs59vr]Waynegerdes@earthlink.net[/email:1hhs59vr]