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What you are suggesting is akin to trying to solve an nth-order differential equation with no boundary conditions. Even if you do all of your tuning in one day, you can't account for the variation...

I don't think it's possible to properly tune your spark advance on the street: even if you had some way of accurately measuring torque output, you have no way of eliminating all the variables that...

I'd be interested in this as well.

It looks like there is a fair amount of experience in here; I'm sure one of us could come up with something.

TAQuickness:
The reason I have mentioned the MAF dominance in the air mass model was because of what I read here (note! "other" forum).



Now, why is it that we can have a decent approximation...

Solving for VE without the MAF seems odd, since the MAF seems to be the dominant influence in airflow calculations when in normal operation; the VE table (I think) was intended for transient throttle...

Can you elaborate on this any more? I would really like to know more about the methods utilized by the factory. :)

Hi Shawn,

I too am one of those "one-post" guys, but I thought I'd chime in. First off, it is important to note that the ideal gas law is just that--a law for ideal gases. These don't really...

I see you have the V1 Flashscan tool from the screen shot; do you have the Commercial version of EFILive? If so, use the "Reprogram PCM Operating System and Calibration" option under the Flash menu...

The only tools you need are that which allow you to put the O2 into the bung in the exhaust (typically immediately following the manifold flange or in the collector of the header). You can buy an O2...

Hi tbaum, welcome to the forum. :cheers:

What people are likely referring to are wideband O2 sensors (although sometimes people utilize exhaust gas temperature sensors, too). The sensor is...

I can try going into OLSD, but my biggest hold-back so far as been the inability to provide adjustments for weather changes. I am in Texas and it is hot during the day and cooler during the night;...

I checked the throttle body hole, and it is stock size (5/32in diameter). The blade is straight and the throttle body is unported, so I don't believe any excess air is going by the blade.

I don't...

I thought it was the M6 cars that didn't need the in-gear portion of the table?

I do have a wideband, but I also have a lot of overlap due to the cam, so I don't have accurate readings. I have...

Thanks for the reply Mr. Prick. :)

I don't have a long-term correction for park/neutral with A/C on, so I can't get a calculated PID for RAFACPN. I do have a short term correction PID for both IG...

Before anyone feels tempted to post a link to the RAFIG tutorial, please don't. I've already been through it.

Now, I am running a 98 PCM with an A4 and a healthy sized cam. The tune is currently...

Thanks for the replies. :cheers:

I wondered if assuming the IFR from the table in the tune definition might have been a bit off; the only reason I thought it might be valid was that because the...

My first post here; I hope it's a good one. I have come upon a wall and no searching has uncovered anything else, so hopefully it is not just ancient information I have failed to dig up. :)

A...