Why tune the VE before the MAF?
Thread Starter
Launching!
Joined: Oct 2022
Posts: 206
Likes: 74
From: FL
Why tune the VE before the MAF? Why is it recommended to tune the VE before the MAF?
Like In a swap where the air intake is stock. The MAF shouldn't change once you get it right correct?
Specifically a gen 3 with a 411 PCM.
Like In a swap where the air intake is stock. The MAF shouldn't change once you get it right correct?
Specifically a gen 3 with a 411 PCM.
TECH Resident
Joined: Oct 2006
Posts: 993
Likes: 173
From: Euless, TX
Well, technically, you can tune the MAF first, and lots of guys do. I always tune the VE first. I personally think it gets you a little better result on the MAF, because then the correction is basically nothing anyway.
On my own personal stuff, it's all SD. I don't even run a MAF.
On my own personal stuff, it's all SD. I don't even run a MAF.
That's just how they teach you to tune that way in the event the MAF fails the ECU still has good data to fall back on and the engine will run ok in SD. Otherwise, everything else trails the MAF above the point where dynamic airflow is disabled.
on NA cars (and I dont do a whole lot of them) where i run them MAF only, I still fill in the VE first. #1 If you have a bad maf the car will still run #2 if it's an automatic, especially a six speed auto, the car needs the tq values the VE table predicts to pull timing on the shifts, even if you have the VE "disabled" for a maf-only tune. without TQ management those 6l80e's die in short order.
TECH Resident
Joined: Oct 2006
Posts: 993
Likes: 173
From: Euless, TX
Well, technically, you can tune the MAF first, and lots of guys do. I always tune the VE first. I personally think it gets you a little better result on the MAF, because then the correction is basically nothing anyway.
On my own personal stuff, it's all SD. I don't even run a MAF.
On my own personal stuff, it's all SD. I don't even run a MAF.
