VE table ??

[ImpBluSS]

Trying to soak up some info on tuning ve and maf tables. Which ve table/tables get calibrated?

[5_Liter_Eater]

What vehicle? Only the E40 ('05 vette and '05 - '06 GTO) have actual VE tables. After that GM went to virtual VE tables.

[ImpBluSS]

07 tbss. There are several ve tables that I'm seeing with the beta ver. Most have either 0's or 100's in them which have not been modified from stock. There was only one I found last night that had different values than that in it but can't remember what it was called. The fuel trims are way off after the head/cam swap and I'm just trying to get it close enough to get it to the tuner. Before anyone says something about vacuum leaks, I've checked, everywhere. No vacuum leaks, no header leaks.

[Cantalope Kid]

Recommend you disable the VE and run on a MAF only tune.

[ImpBluSS]

Recommend you disable the VE and run on a MAF only tune.

How's this done. I've been reading through threads for a couple days now and get bits and pieces but it's tough to find concrete answers on this forum.

[angrygoat]

it should be under dynamic airflow/ high rpm disable and low rpm disable. Set both to zero. At least that disables VE on my gto

[ImpBluSS]

it should be under dynamic airflow/ high rpm disable and low rpm disable. Set both to zero. At least that disables VE on my gto

I only have high rpm disable. Setting this to zero will disable VE? Also I found the table I was referring to. It's also under dynamic airflow. It's VE correction factor. What's this table for? I've tried doing a search for VE tuning but search feature won't recognize VE because it's not enough characters.

[ImpBluSS]

It worked! Damn thing started up and idled fine. Hot and cold. Turned VE off, then back on to verify. So what does that tell me. VE tables are way off and if so which table? The VE correction table or should I just leave it off? MAF still needs some work but it's a mile from where I was at. Thanks...

[Amric]

I like SD much better than MAF in the lower RPM. There are just two many different combinations of RPM and MAP that show up on the same Hz on the MAF only scan. Seems like in low RPM MAF, getting on and off the gas in traffic pulls more AFR error than a good tuned VE table ever will. Especially when you have a big cam and need more airflow to maintain idle, while at the same time the motor is not burning as efficiently. If you dial in the idle with MAF only, then the low load cruise will not be ideal AFR since you can hit the same Hz as you get on and off the throttle in traffic. It seems like once the VE really gets dialed in, the throttle control down low is great.

Who cares if the tables went virtual. Once you get your head around it, they are just as easy to tune as the old tables. Just takes more time.

Of course I like MAF up top, since it is too hard to get enough cell hits in the upper RPM ranges to really get VE dialed in up there. I solved this by writing a program that takes standard deviation, cell hit counts, and acceleration vs deceleration to adjust what the average AFR adjustment should be for each cell. This allowed the VE to be dialed in much faster.

Give up VE if you want, but at least try and tune it in first. You might really end up liking it.

[Amric]

In Engine->Airflow->DynamicAirflow do you have "Zone RPM Boundaries" and "Zone MAP Boundaries". If you do, then get the program called "EQ_VE" to get you started, and do a search on how to use it. It is really easy, and will get you close.

Once your close, you can get much closer by modifying the equations manually, using more analysis on the scans than the simple "averages", or "> x count" stuff.

[ImpBluSS]

I like SD much better than MAF in the lower RPM. There are just two many different combinations of RPM and MAP that show up on the same Hz on the MAF only scan. Seems like in low RPM MAF, getting on and off the gas in traffic pulls more AFR error than a good tuned VE table ever will. Especially when you have a big cam and need more airflow to maintain idle, while at the same time the motor is not burning as efficiently. If you dial in the idle with MAF only, then the low load cruise will not be ideal AFR since you can hit the same Hz as you get on and off the throttle in traffic. It seems like once the VE really gets dialed in, the throttle control down low is great.

Who cares if the tables went virtual. Once you get your head around it, they are just as easy to tune as the old tables. Just takes more time.

Of course I like MAF up top, since it is too hard to get enough cell hits in the upper RPM ranges to really get VE dialed in up there. I solved this by writing a program that takes standard deviation, cell hit counts, and acceleration vs deceleration to adjust what the average AFR adjustment should be for each cell. This allowed the VE to be dialed in much faster.

Give up VE if you want, but at least try and tune it in first. You might really end up liking it.

I'm just trying to get it to the tuner. Won't idle with the VE enabled and the fuel trims are out of sight. It was like night and day and once again i dont know which ve tables need work. Been hotrodding for a long time but am totally new to the computer controlled stuff. I'll put it this way, utilizing the histo's finally starting sinking in today when I was working on it...

[RWTD]

Your tuner isn't going to tune the VE table anyway (I can bet you a billion bucks), because he won't understand that specific style of VE tuning, and even if he did he's going to charge you double or triple to tune for VE, just due to the amount of actual time that is needed for VE tuning, especially in your case. That's why it is recommended to tune in MAF only mode. I can assure you that your vehicle will run 100% perfect in MAF only mode.

And, FWIW, you do have a "High RPM Disable" and "High RPM Re-Enable". Set both to 0, or 100/0, or 50/0, or 1/0 (as long as it's well enough below idle).

[ImpBluSS]

High rpm disable set at 0. Don't remember seeing a re-enable table. At work now, have to look when get home. It's really close enough to get to him so he can get it right. Thanks for all the help!

[RWTD]

If you don't see it, then you need to upgrade your software.

[ImpBluSS]

If you don't see it, then you need to upgrade your software.

I've got the latest beta. I prob overlooked it. Once i set the disable table to 0 i didnt mess with the airflow anymore. I'll look when i get home. thanks

[jmoody66]

Will disabling the ve hurt anything on a 06 gto?

[RWTD]

Will disabling the ve hurt anything on a 06 gto?

No.

[ImpBluSS]

If you don't see it, then you need to upgrade your software.

Haha, it was right below the disable. Thanks...

[04blackgmc]

so u guys have seen any affects rather than easier tuning from running MAF only and disabling VE?

[midevil1]

so u guys have seen any affects rather than easier tuning from running MAF only and disabling VE?

I picked up an honest 2 mpg's.