Is there a how to on this yet ? I know I need the 4 bar map sensor and ait is optional.
Why is it optional tho I live in ohio I don't do much traviling the biggest change is the weather. I hope you guys can clear this all up for me I'm very interested in doing it.
O where does the ait sensor go?

 

search the name schedies, all the info is spoon fed to you lol

 

I just tried searching his name it says invalid name that search thing never works for me! Always says invalid search bla bla bla. Maby it's because I'm using a iPad

 

good place to start would be the ECUflash forum

 

Why do people think the AIT is optional?

SD: Air pressure and air temp = airmass

The AIT gets installed in your UICP.

 

Use Google. Type what you want followed by EvoM. Works every time. The EvoM search engine works better in threads (for me anyway).

It's not technically speed density. It is some clever code that subplants airflow measured by the MAF (load) with airflow measured with temp + pressure sensors and a fixed barometer setting.

Anyway I believe its's called something like "speed density how to"...

 

Since Im really nice........

https://www.evolutionm.net/forums/ec...ched-roms.html

 

i think they misunderstand the concept of wiring it into the MAF connector or ECU fuel temp

 

Fuel temp mimics actual UICP temp so close as to be negligible. Most IAT maps in standalones dont get used as much as seems to be inferred. Therefore if I know pressure, pressure is converted to load (whether its a "real number" or not compared to an AEM, ViPec, etc.) have air temp correction based on fuel temp input I still know air mass.

The barometric correction is also something thats almost never used in standalones.

I guess if you wanted to get technical its Alpha N with Boost Comp, but even then its more accurate than just Alpha N.

 

Okay, so your using fuel temp and pressure to find airmass. Makes sense, but even if fuel temp "mimics" air temp somewhat, I would want an actual AIT sensor in my SD setup. And I would agree, its not actually SD doing it that way, more like an advanced Alpha N setup.

 

IATs heat soak in traffic. Since the Mitsu ECU isnt set up to see 160*F IAT because of this it will richen up and drop timing. Stock Turbos would be the worst off but thats the problem, where do you draw the line and start using nothing or use fuel temp?

The factory system wants inlet temp only and all the "correction" is based off of that. Timing pull and AFR is all based on what the inlet temp is. The easiest way to tell if it works is to test it in a wide range of temps and publish results. I have tested (I'll add it one more time) from 16* to 106* and my AFRs are consistent.

The term SD is semantics, we are using it to describe MAP based vs MAF based and thats what everyone knows it as. Whether its really true Speed Density or not has become irrelevant to whether it works or not.

Moates sums it up nicely-

http://support.moates.net/2010/02/11...speed-density/

I find it interesting that under "weaknesses" the point is made that even most OEM dont do it by the book but cheat where they can. The only exception I can think of is GM that has some hybrid systems to make calculations more accurate.

 

I'm new to SD too. Just wondering does the Oem Maf need to be replaced/removed?

 

yes the maf can be removed when using sd

 

Where are you typically seeing the sensor placed?

 

so what do you use/ how would you have your ECU use the fuel temp instead of running an IAT snesor?