TDStuart Tuning Adventure

[engineermike]

Your car, stock, should be commanding MP1 at idle, which is 20/0 cam angles. If it's not, then something else is wrong. I suggest you figure that out first.

And again, you should not move any mapped points, ever, unless you really know what you're doing. The calibration data cannot possibly be correct when you do that. If you are not able to make it idle right without moving a mapped point, then moving the point is not the answer. You have me and markmurfie both telling you the same thing. You do understand that all the SD, torque, and spark data is specific to the cam timing of the mapped point, so when you change the cam timing, all of the data is no longer accurate, right?

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[markmurfie]

My car commands mapped point 0 at idle.

Again the car drives fine. I like how it drives, it transitions pretty smooth.

The issue is while idling if I shift from drive to neutral it flares while it holds to commanded point. It also doesn’t like idling in dashpot as much as rpm control for some reason

It starts up in MP 0, and may stay there for the duration of emissions reduction mode.

It settles into MP 1. Cam angles IVO 20, EVC 0.

From there it moves up to MP 2,3,4 ect with throttle and load.

No stock HDFX car is going to idle at MP0 with cams at IVO 0 and EVC 0.

If you are going the route you want to go modify MP 1 with the cam angles you want. Leave MP 0 alone.

 

[tdstuart]

You do understand that all the SD, torque, and spark data is specific to the cam timing of the mapped point, so when you change the cam timing, all of the data is no longer accurate, right?

Yes I understand this, but the car didn’t like idling with me commanding mapped point 11 or 12 so idk what to do. I don’t want to mess with those as they might actually be used when I drive.

 

[tdstuart]

It starts up in MP 0, and may stay there for the duration of emissions reduction mode.

It settles into MP 1. Cam angles IVO 20, EVC 0.

No stock HDFX car is going to idle at MP0 with cams at IVO 0 and EVC 0.

Hmm I swear mine was sitting at MP0 but maybe you are right and it moved to MP1 after emissions reduction. I’ll flash a tune without the idle cam changes and verify.

 

[Pistol_91]

Yes I understand this, but the car didn’t like idling with me commanding mapped point 11 or 12 so idk what to do. I don’t want to mess with those as they might actually be used when I drive.

Lol you can command it at idle and it will still command it while driving the car like it normally would. Thats how the distance tables work...

 

[Pistol_91]

Again...

 

[tdstuart]

I havent really messed with the ghost cam stuff too much but pretty sure theyre talking about this. This also shows how the distance tables work

From my understanding the car will look at the mapped point snap lines too.

Is the car actually looking at the 2 profiles (stability and efficiency) at the same time? I thought it was only looking at one at a time.

 

[tdstuart]

Lol you can command it at idle and it will still command it while driving the car like it normally would. Thats how the distance tables work...

Yes I command it at idle, and the car will barely idle, so I will have to make some adjustments to the tables and my worry is it will throw off the car when not idling due to the changes.

 

[engineermike]

Yes I understand this, but the car didn’t like idling with me commanding mapped point 11 or 12 so idk what to do. I don’t want to mess with those as they might actually be used when I drive.

When you change the location of a mapped point, you invalidate the entire mapped point unless you're wanting to completely recalibrate all of the spark, torque, and SD data for that mapped point. When you command an existing mapped point with the cam angles you're looking for, all of the calibration data is still as Ford intended so it's a pretty good starting point. I'm not doubting that they don't idle perfect, as Ford probably didn't spend much time trying to get it to idle at -20/20 cam timing, but at least it doesn't muck up all speeds and load for that mapped point. I would suggest commanding a mapped point that already exists and working on calibration of that mapped point at idle. Mapped point calibration is a function of load and speed, so changes made to help idle stability will only affect it at idle. Mucking around by changing the location of MP0 or 1 can affect lots of things....the law of unintended consequences.

 

[engineermike]

From my understanding the car will look at the mapped point snap lines too.

Is the car actually looking at the 2 profiles (stability and efficiency) at the same time? I thought it was only looking at one at a time.

The snap line between two points just makes it interpolate between those two points when it's near the line, rather than interpolating between all mapped points.

It will only uses once vct mode at a time.

 

[K4fxd]

It should be idling in MP1

 

[tdstuart]

Ford probably didn't spend much time trying to get it to idle at -20/20 cam timing

Do you think it would be easy to copy over mapped point 0 or mapped point 1 idle settings to an existing mapped point so it idles better?

 

[Pistol_91]

You can try copying over all values for that one specific mapped points but I don't think it will work because of what mike said. They probably didn't spend any time calibrating the idle cells for any other MP than 1. If you want it to idle better, you probably need to adjust DD and turn the idle up to 850 or something like that.

 

[K4fxd]

Try this

 

[Pistol_91]

Try this

I think the idle stuff in the vid is the secret sauce you're missing. I forgot about that stuff.

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