i feel like im doing something wrong...

[IamKuahn]

ive downloaded some tunes to compare mine to and i feel like my ve map is all wonky compared to ones i found on the sloppy mechanics tune cabinet. my truck rips, so im sure im just paranoid and overthinking. in any case here is my tune vs compare files. mine is labeled 2barturbobase8 and i attached a log file to it as well if anyone wanted to review. also if anyone has the answer to why that other tune is so drastically different id love to hear it.

[blindsquirrel]

What injectors, what fuel system, what fuel pressure, are the cats/downstream O2s completely gone, is the MAF completely gone or just failed for VE tuning, what MAP sensor, what is the combo? What parts? What is it?!

On the cat/O2 codes, unchecking the box does not disable the diagnostics. The tests all still run, and the actions taken in response still happen, unless you change the drop-down to No Error Reported.

[IamKuahn]

my bad...lol im strictly talking about how the ve tables look, ive got deka 80 58 psi 1:1 fpr tbss intake summit 210 218 cam walbro 450, 7875 chinacharger ntk 2 bar map cats gone maf gone

[abc]

The tune you are referencing as a compare file is a scaled airflow/fueling tune. Don't use that as a comparison.
You likely have a fueling issue, such as, injector data is incorrect, insufficient fuel flow, and so on. You are also targeting too lean in your BE for a boosted scenario.

We know that by looking at the VE table and seeing numbers significantly above 110 percent, as you are at your max boost in the log posted.

[blindsquirrel]

There is no MAP sensor I'm aware of that has the actual linear/offset of 200/10.33. Those numbers are simply the defaults that get filled in when the custom OS is applied. There is no one single sensor for a '2 bar map'. Part number. Need part numbers of the actual parts actually being used.

Also, post the datasheet you got the injector data from. Everything I have seen has those at 94.something at 58 PSI so if the IFR is wrong then the rest of it is suspect too.

[Alvin]

ive downloaded some tunes to compare mine to and i feel like my ve map is all wonky compared to ones i found on the sloppy mechanics tune cabinet. my truck rips, so im sure im just paranoid and overthinking. in any case here is my tune vs compare files. mine is labeled 2barturbobase8 and i attached a log file to it as well if anyone wanted to review. also if anyone has the answer to why that other tune is so drastically different id love to hear it.

The VE looks reasonable. Fuel trims show it needs some editing still... Actually rich in all the LOW PW areas so maybe injector data isn't correct but for sure ECM 2284 needs to be reduced. I move them to zero with no problems. This must be done ASAP. It caps low injector PW's.. the injectors will not be able to fire less than that limit.

Another FIX ASAP is..

Your PE settings.. PE is too lean for a boosted engine.. BE isn't setup at all. You are commanding 1 in boost enrichment. This needs to be fixed before you drive it again IMHO.

You aren't logging nearly enough to be able to tune this. Commanded EQ and wideband would be a priority.

[IamKuahn]

ntk ma0031 is my map part number, how do I find that data?? What is ECM 2284. How would I setup boost enrichment? And I will try to find the injector data I used later today to post it

[IamKuahn]

Thank you all so much for y'alls suggestions too btw I really appreciate the help

[IamKuahn]

One other question... What is the point of scaling with a p59? Isn't the injector limit something like 254lbs an hour or something crazy with these ecus?

[gtstorey]

ntk ma0031 is my map part number, how do I find that data?? What is ECM 2284. How would I setup boost enrichment? And I will try to find the injector data I used later today to post it

Go to RockAuto and look up the MA0031 and figure out what it used on or check for a cross reference number. Looks like it cross references GM 12615136. The GM values are available here;
https://www.pcmofnc.com/2020/03/12/g...r-2-bar-3-bar/

[IamKuahn]

https://docs.google.com/spreadsheets...f=true&sd=true
this is the injector data i used

[IamKuahn]

This may seem like really flawed logic on my end but... doesn't adding boost increase volumetric efficiency? Like if you add 1 bar of boost to the intake shouldn't that double the ve?? Or am I just thinking about this in the wrong way? Originally I was thinking I don't have enough in my ve table but now I'm not so sure. Id really like to wrap my head around all this and sorry this may seem really simple to you guys but I'm still so new to all this.

The tune you are referencing as a compare file is a scaled airflow/fueling tune. Don't use that as a comparison.
You likely have a fueling issue, such as, injector data is incorrect, insufficient fuel flow, and so on. You are also targeting too lean in your BE for a boosted scenario.

We know that by looking at the VE table and seeing numbers significantly above 110 percent, as you are at your max boost in the log posted.

[IamKuahn]

Thank you for the info it really helps a lot

Go to RockAuto and look up the MA0031 and figure out what it used on or check for a cross reference number. Looks like it cross references GM 12615136. The GM values are available here;
https://www.pcmofnc.com/2020/03/12/g...r-2-bar-3-bar/

[abc]

The VE looks reasonable.

130 percent VE at 4000 rpm or so with his combo., looks reasonable to you?

This may seem like really flawed logic on my end but... doesn't adding boost increase volumetric efficiency? No, not in the definition of the factory VE table.Like if you add 1 bar of boost to the intake shouldn't that double the ve?? No, it will get close to doubling the mass air flow but not the VE table number.Or am I just thinking about this in the wrong way? Originally I was thinking I don't have enough in my ve table but now I'm not so sure. Id really like to wrap my head around all this and sorry this may seem really simple to you guys but I'm still so new to all this.

With your current understanding, using an example of a 100 percent VE engine, If you added an additional bar of boost, you would expect to see 200 percent in the VE table, and so on. The fairly current trend of tuning via a VE table is just an easy way to look at a formula of converted data and make sense of adding fuel or removing fuel in an area that shows a diversion from the current desired lambda.

What boost does do is add mass air flow but in the formula provided in the factory PCM it does not change the fundamental VE of the engine.

As the O2s show lean, you are tuning in SD, you add to the VE table. Your now at 100 percent in the VE table for that given cell. The O2s continues to show lean, so you continue to add to the VE table, now your at 120 percent in that given cell, yet your still lean. In this case, your VE is not going up, your just not supplying enough fuel to satisfy your expected lambda target.

There is obviously much more to it, but long story short, your fuel supply is lacking or the input data is skewed or something is wrong...

[gametech]

130 percent VE at 4000 rpm or so with his combo., looks reasonable to you?



With your current understanding, using an example of a 100 percent VE engine, If you added an additional bar of boost, you would expect to see 200 percent in the VE table, and so on. The fairly current trend of tuning via a VE table is just an easy way to look at a formula of converted data and make sense of adding fuel or removing fuel in an area that shows a diversion from the current desired lambda.

What boost does do is add mass air flow but in the formula provided in the factory PCM it does not change the fundamental VE of the engine.

As the O2s show lean, you are tuning in SD, you add to the VE table. Your now at 100 percent in the VE table for that given cell. The O2s continues to show lean, so you continue to add to the VE table, now your at 120 percent in that given cell, yet your still lean. In this case, your VE is not going up, your just not supplying enough fuel to satisfy your expected lambda target.

There is obviously much more to it, but long story short, your fuel supply is lacking or the input data is skewed or something is wrong...

His current understanding of VE is exactly correct. If you had 100%VE at 1bar, you would theoretically have 200%VE at 2bar. The only reason we don't see this exact linear ratio is because of various inefficiencies that happen under boost, most notably being that we are trying to get more exhaust volume out of the same exhaust system (or less exhaust system with a turbo). Have you never SD tuned a boosted motor?

edit-- And the compare file OP is looking at has a LOT of problems, besides being scaled improperly. Its only use as a comparison file is for what not to do.

[abc]

VE wrong....png

This is how I do it with 16 psi of boost. How should it be done?

[blindsquirrel]

If it's making more power than it would N/A then the additional fuel has to be coming from somewhere else, like PE.

[IamKuahn]

Btw my afrs wot is in the 10s on my wideband

[IamKuahn]

His current understanding of VE is exactly correct. If you had 100%VE at 1bar, you would theoretically have 200%VE at 2bar. The only reason we don't see this exact linear ratio is because of various inefficiencies that happen under boost, most notably being that we are trying to get more exhaust volume out of the same exhaust system (or less exhaust system with a turbo). Have you never SD tuned a boosted motor?

edit-- And the compare file OP is looking at has a LOT of problems, besides being scaled improperly. Its only use as a comparison file is for what not to do.

Yikes... Lol not sure what exactly I've used from it, injector data is not it tho or ve data, maybe adaptive idle settings and it seemed to prevent stalling alot

[gametech]

VE wrong....png

This is how I do it with 16 psi of boost. How should it be done?

That VE table is mathematically impossible, so I guess you are using bigger injectors than you have them listed as in the tune. That does not account for all of it, though. Are you also spraying meth?

edit-- Is your tune part of the way, but not quite scaled for bosch 210s or something?