You seem like the most knowledgeable guy on here so what do you think about VEmaster? Any cons or risks that we might be taking?
Thanks

 

Hi, sorry but I've been on vacation and I am just on the "net" briefly. I don't use VE Master. I have my own method to tune SD. From what I've read about VE Master, it seems to simplify it for a lot of people that don't want to do a lot of scans and "dicing and slicing".

For the "anally inclined", I think my method is better, but you really to be **** about prom tuning. But for those that "have a life", VE Master is definitely worth a look.

PS: It is not a good idea to address a post to one person (and I changed to title to open to all VE Master experts). They could be on vacation (like me) and your post gets missed. Also, I think it is a good idea to chat to others that may be using the product and have better info to offer. I believe Tim may use VE Master - but don't hold it against me if he doesn't.

If you are interested in my "dice and slice" method, I will discuss when I get back from vacation.

 

VEMaster is nice for getting closed-loop fueling "close enough" and would be considered invaluable for a new engine setup.

VEMaster will *NOT* help you with spark tables, Power Enrichment (WOT) tuning, or Accel Enrichment ("pump shot") tuning...all of which cost you in efficiency and engine longevity if not tuned to your combo.

And as Glenn said, to squeeze every bit of efficiency out of closed-loop fueling you need to tune manually and TRAXXION's article above describes it on the money. VEMaster will get you darn close after a few runs, but it can only tune in RPM/KPa coordinates you actually run the engine in...fail to tune the entire table and you'll eventually hit an untuned RPM/KPa coordinate and the engine will fall on it's face.

 

Over the last year tuning my 730 setup, I have canged the way I jumble and mix my BLMs 4 times.

First off, I think VE Master sounds good. It sounds kinda similar to what I have already written with macros in Excel.

But remember, a computer will only do what you tell it to do, and a program will only work how you tell it to work.

With that being said, you should still review the final data. I tried to download the software about 4 times because I guess you get 10 free runs with it. I got timed out each time (dial-up). So I Haven't used it.

But does it take into account Cell shifting? Is averaging really better than using the median? Lots of questions I have about it and I wish I could DL it to find out.

FWIW, I only used the 'average' method in my first couple trials. I started using a median method and a compare function to match it against the average. If the 2 were more than 2 points off in BLM value, I did some further interrogation.

Also something interesting. Using my method (or probably VE Master) can make some really weird VE tables. I know that mine were all over the place due to a bad CC setup. But I still had 128/128...

Good luck, -Matt-

 

I actually look at "AVERAGE", "MEDIAN" and "MODE", along with Standard Deviation. Also, I will look for "unusual" values which may be caused due to "transistion" and other factors like the Ambient Air Temp (I have a relocated MAT) and possible engine temp (hot day and load on engine can skews results, especially if your MAT Tables our out).

Lastly, for a specific RPM/LOAD (let's say 2,000 rpm an 70 KPA) I will look at specifically 2,000 RPM/70 KPA values and then 2,000 +/- 25 rpm, 50 rpm, ... to 100 rpm and 70 KPA +/- 1 KPA, 2 KPA and 3 KPA. The "range" depends on the interval between each "step". The Low VE Table has only 100 rpm steps while the high VE table has 400 rpm steps. Similar with the KPA - low range has 5 KPA steps and high has 10 KPA steps.

The bottom line is I like to see how well the numbers corroborate each other. If they are all close, then I am a happy camper. But if I am getting really "weird" numbers I tend to look at an "overall average" of "all the averages" and/or the MODE. Make sure you use some common sense and do look for "weird" values and consider tossing them out if you get a "stray oddball". Though you should try and see why that "oddball" came up. It may lead you to other things to consider.