I just can't get my stock b20 to run at 14.7 as soon as I start pulling fuel from the table on s300 the load moves up the table bet I can get it as is 13.5-13.7. Any suggestions?

Heres my current map https://drive.google.com/file/d/17V-...ew?usp=sharing

 

Do you have either a narrow band or wide band oxygen sensor installed? I would recommend using the Closed Loop parameters for AFR control as opposed to fuel tables.

 

Aem wideband, anytime I try to run in closed loop the ecu pulls a lot of fuel so it jerks do you think adjusting the rich to lean speed help?

 

Here are my settings that work well for my setup.

 

Do you know what your afrs on low load?

 

Pm sent.

 

you should probably get a professional to tune it. Unless you like going through engines faster than gas. Just sayin.

 

Its just a stock b20 it runs fine just a little rich with the adjustments I have made. If it was a real build I would go to a professional

 

Check your DM about setting up the lambda voltage conversion tables.

 

You should be able to cut your gains in half from where you are, trim the limits too. I guarantee it will run smoother, if your actual fuel maps are pretty dialed in.





*** I am open loop at idle due to running a lean-cruise cal. That's why the max TPS is 0% in those sites.

 

well that is my issue when I try to get them dialed in close to 14.7 it wont idle right leanest I can get it to idle is 13.7

 

Post a cal and a data log.

 

Hmmm....looks like you subscribe to EPA, no?

 

I did a month to see if I could pick up a couple of things and I did. Was also happy to see I’d gone the right direction on others. But if you look at the way the lambda control normally behaves it’s pretty clear that the first step is to calm it down and clamp.

I don’t understand why he used the voltage target when s300 actually has some limited lambda target maps. I run closed loop with multiple targets at different temps everywhere except idle as the wot line, works great. The trick with using any kind of closed loop control is getting your maps as accurate as possible first so the control doesn’t have much to do except compensate for fuel blends and variables you just can’t predict. Formula, IndyCar and LMP car engines aren’t running open loop unless they are in a limp mode (but they obviously have better control than we do).

Also, I do calibrate for a living 👍🏻

 

Hello Adam I've been following your posts for years and have learned a lot from your responses to questions in several areas - thanks for sharing your knowledge.

However, I did not know that you tune professionally and since I am eager to do the same (and destined as I have already made my decision), I would like to ask you a couple of questions.

To get a solid background in theory, I invested in the lifetime subscription to Jeff Evans tuning videos as based on his knowledge, professionalism and customer reviews, I felt confident it would put me on the correct path for my new goal. These videos are also multi-platform allowing me to tune both imports and domestics.

Knowing that theory is not enough, I plan to first tune my own cars before working on customers cars. When I feel confident enough with the results on my cars, I plan to invest in a professional dyno and open a tuning facility along with a speed shop. This will be a family business.

Do you think I am going about this the right way? Do you think I made a good choice going with Evans? You can PM me if you prefer to take this offline. Thanks Adam!

 

Yes. Jeff Evans is one of the best to ever do it. Ive learned how to tune using his academy.

 

I agree!

Thanks for the positive feedback.

 

Yes, I think he does some good stuff. The HP Academy courses are really good too, but more focused on higher end equipment and theory than the Jeff Evans courses. He does a good job of breaking things down in an every mans method. I thought the material was worth the subscription.

7rrivera7, I always check out your stuff too, here and back on pgmfi, especially when the engine sim thread was still kind of alive. Feel free to PM me if you have any questions.