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VE tuning....not necessary?

PacerSS

PacerSS

New member
I was recently told that a VE tune isn't necessary. This was brought up due to my suggestion of running an L32 MAP on my top swap to be able to have a 2-bar and read boost for VE tuning purposes. I was informed that it wasn't an issue to be able to read boost since the MAP is only used on startup(no boost) and MAF failure instances. With that in mind after all of the tuning research I have done I heard that a VE tune is the foundation of tuning and should be done to get idle and cruise down before moving on. What is everyone's take on this?
 


I don't tune VE... however, many swear by it. Many will tell you that VE is only good if your MAF goes out... other's will say do this first and it will help you tune in your fuel trims better ( MAF tune).
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My vote is no, others can chime in.. :)
 
like goose said, you only need it if your MAF is whacked.

i liked having a good VE tune because i didnt want to rely on solely the MAF, even though thats what the car does. given the chance i would eliminate the MAF and run the car speed density.
 
in my tuning experience, some cars (different years) use the VE and some dont, The way to test is to zero everything out and try.

my car is very dependent on the VE, and wouldnt idle with out a good VE tune
 
That's my main concern, I'm going to be utilizing a pretty aggressive cam. With that in mind I think that strictly MAF tuning the beast would be a PITA and probably not yield much for idle.
 
In my opinion you would want to go ahead and tune for VE especially if you are putting in a cam because that will change your numbers from a stock cam. Even if it is only used when the maf fails i wouldn't want to be at the track at 6000 rpm when the maf decides to give out and the computer is only thinking your getting a smaller amount of air and your fueling gets all screwed up, possible to cause damage.
 


That's my main concern, I'm going to be utilizing a pretty aggressive cam. With that in mind I think that strictly MAF tuning the beast would be a PITA and probably not yield much for idle.
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VE tuning is useless. Ive experimented on 25+ Grand Prixs of all different years with various OSIDs.

MAF tuning is not a PITA at ALL if you know what you are doing. You can go to a full time open loop tune to eliminate fuel trim issues with the cam. Again, if you know what you are doing, you can do a full open loop tune with a wideband in like an hour assuming there are no issues on just about any car. Idle will be rock solid at whatever you set it to no matter what.

Pwned.
 
Tengis said:
VE tuning is useless. Ive experimented on 25+ Grand Prixs of all different years with various OSIDs.

MAF tuning is not a PITA at ALL if you know what you are doing. You can go to a full time open loop tune to eliminate fuel trim issues with the cam. Again, if you know what you are doing, you can do a full open loop tune with a wideband in like an hour assuming there are no issues on just about any car. Idle will be rock solid at whatever you set it to no matter what.

Pwned.
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X2 Pwned.
 
Yeah feel free to explain said pwnage, I'm really curious now. I must be missing something.

So was it the part where MAF tuning a car with an aggressive cam and Stage 4 heads being a PITA? Or the fact that because he thinks that VE tuning is pointless and has tuned other cars makes it fact? I'm really wondering.
 
he is saying that you can easily MAF tune a car to however you want it to run so long as you know what youre doing and that VE tuning is far less accurate.
 


Ok, sounds feasible. Is that the majority opinion? I see it as to be about split so far in this thread. But researching has suggested both I guess, I was just asking if it's reasonable to rely on MAF only.

So with that being said shouldn't one at least attempt to get a semi-decent VE tune going as a "worst case" backup in the event a MAF does fail?
 
if you want a great tune, do both.
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Or you can put whatever numbers you want to in your VE table and then realize that its not effecting your tune. If we were talking about a Cobalt PCM... then ya, you have to do a VE tune. Our PCMs seem to be archaic and only use the VE table when the MAF doesnt work.

I just tuned a 344whp 377wtq non intercooled S1X car... with a stock VE table.
I just tuned a 373whp 398wtq intercooled XP car... with a stock VE table.
I also run a stock VE table on my car.
 
I messed around with VE tuning and it did jack for my car. It is said "some" cars reference the VE tables and others don't mine certainly doesn't use this table what so ever.

I zeroed out the VE table and as well put some crazy numbers in the VE table and nothing happened. The only time my car would use the VE table is if my maf fails.

I tried to VE tune my car back in the day and what a mess that was trying to keep the car going without a maf sensor.

My VE table is bone stock and don't see a need for touching it.
 


I believe that VE is referenced during times of open loop such as start up and decel (aka. Deceleration enleanment). I have also tried setting the VE to stock,0,100,150 and the only thing I noticed when doing this and performing back to back 0-60runs and a circle back to the starting point was that when set to 150 my engine turned off during the run I had to pull over and it would not start till I re flashed it.
 
Mines been stock for as long as ive owned the car. I dicked around with it years back but it didnt do chit. My trims lock my trims sit pretty. My car starts after many hot lapping 1/4 mile runs back to back. Just my 2 cents
 
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