I was thinking all the reading and research I have done about VE tuning. All the documents say to "Hand Smooth" the cells you did not log, so the VE table will be smooth. My question is...if you hit all the cells in the Histogram. What do you need to smooth? My VE table right now is a bit choppy, but my STFT are almost all 0 & 1. Why would I smooth it, won't it throw all my numbers off? Just because it's not smooth, does that make it a bad thing???

Thanks for the feedback!

Jason

 

the transition in between cells should be smooth. raise one and lower another to get them smooth. your car would probably not notice a 2 or 3 percent change. the smoother the transition the smoother the throttle response and so forth.

 

ok...makes sense, but I thought the goal of VE tuning was to get the LTFT and STFT at 0? If they are at 0, and the VE tables are choppy, making a change would throw them off.

 

The goal is to get it between -4 and 0 really. Mainly because slightly on the rich side is safer for the throttle cracking WOT and going lean for that split second.

You definetely want it smooth so the throttle response is crisp and not jerky.

Dixit

 

what i do is log and do the whole table, and do a poly smooth to 0 decimals and go back to it again.

 

I agree, with the poly smoothing I eliminated the jerkiness or bucking I was having around 2K-2600rpm.

 

Smooting had me chasing my tail for a little while. No I just use my hands and my eyeballs

 

When I tune my VE table I have a spreadsheet that takes and average and really leaves you with nice results. I rarely have to smooth it and gives you numbers that are dead on.
Phil

 

You feel like sending it my way?

supercharged_z2000@yahoo.com


Thanks,
Jason

 

budchevy358@yahoo.com if you dont mind as well

 

Larry,
Is that VE tuned for a flat 13.0 across the board?
Phil

 

I'll post it here in a few....Here's the basic functions
1) Air to Fuel stitch - allows you to combine multiple logs of A/F data
2) Primary to secondary calculator
3) VE Tuning sheet
- Input your A/F table
- It averages the cells directly above below left and right
- Input A/F for 15 - 75kpa
- Input A/F for 80-105
- Input max and min correction factor
- Input Primary VE table
- Output new corrected VE table and secondary
Phil

 

Nope 14.8 for cruise 13.0@WOT

 

Like HumpinSS said, I use the hands and eyes - and my butt. Using the smoothing features can have you chasing your tail. A little bumpiness is ok, just so it doesn't resemble the rockies! And most importantly, if the car drives nice and smooth with good transition, leave the bumps alone - noone is gonna pull your ve table and grade you on smoothness

 

Sounds like its a great spreadsheet! Can't wait to check it out.

Thanks,
Jason

 

Here is what mine looks like. I have tried and there is no way to get the table smooth. It just isn't possible. Car drives perfect and there is no stumbling or hesitation.

 

I agree with HumpinSS. I didn't use any of the auto smoothing features during my SD tune. My first few passes at it looked like the rocky moutains on crack. After a while though, it started to smooth itself. 20 or so flashes later, I started getting the general idea of where it was going and could eyeball values that were off.

The attached images should give you a better visual.

 

I'll post it as soon as I get home tonight....after over 100 tunes this one really has made my life simple. No more 30 minute drives.
Phil

 

Awesome man, thanks!

 

VE Sheet