LOL I just signed up to the wiki to add it, and then I noticed it was there and was like WTF?  Was it there the whole time?  Good to know I'm not going crazy (yet)

Anyone??

I set FKVA to 10 and lowered my KVB setting to around 120.... my display show that I'm using 2L /100km...

I'd really like to get this dialed in

With my KVA maxed (around 712 or so) it's still not enough... I have 1000cc running @ 4BAR so almost 1200cc.

My understanding was that FKVA was a multiplier.... but it doesn't seem to work.

pic for giggle:

It seems to work for julex, don't know what it doesn't for me

http://nefariousmotorsports.com/forum/index.php/topic,496.msg5693.html#msg5693

Everybody has their own theory on how to set this.  It's actually quite easy if you take a numerical approach.  Divide your injector size at the operating-pressure you use by the stock size at this operating pressure.  OK:  ev14's @ 4-bar ~= 630cc/min   Stock b5 s4 ~= 349 cc/min      (630/349) ~= 1.75.

Set FKVA to 1.75.  Write your tune.  Reset your tripometers.  Fill up gas and start with a full tank.  Don't overfill.  Use same pump / same gas station for both fill-up and re-fill.  Calculate your actual MPG based on a precise procedure such as I've described.

Since your FKVA is large enough for huge injectors, KVB now has enough dynamic range to be adjusted precisely.  Rinse/repeat your procedure using static FKVA, estimated like I talked about above.  After a few trials your dash mpg will be within +/- .25 mpg.  Actually using this, I've got my mpg to within +/-.1 of the actual.

The trick is that you have to a) follow a precise refill procedure, b) understand what you are doing, c) start by making a static large-adjustment to FKVA from it's 1.00 stock value to .25 step-size rounding and then leave it alone.

The problem most people have is that they don't actually understand the equation governing this stuff.  Look its simple algebra.  Get your FKVA roughly adjusted, because the precision of KVB isn't sufficient for large injectors without FKVA bumped up.  Reread what I've written here, it's very easy.  Nyet's the one that tipped me off on how to properly do this.

Man, trust me, it's way easier.  You are thinking too hard.  I have 60# / 630 @ 4-bar bosch-ev14.  I am using 1.5 * 570 ~= 855.
Julex has 97 # / 1015cc @ 3-bar InjDyn.  He uses 2.0 * 500 ~= 1000.
You are using 1200cc @ 4-bar, arguably 1000cc @4-bar.
(i'm not sure which and it doesn't matter which.  that was my point with the "numerical technique approach".)
Set your FKVA to 3.0 and set your initial KVB to 400.  3.0 * 400 = 1200.

Start a static FKVA, do the procedure I've listed.  Report back the following.  I will help you make the adjustments.
We require:  Miles Driven, Fuel Consumed, and Tripometer MPG from your LCD display.

Seriously, its this easy, I promise everyone this.  Nyet advocated this basic idea on the wiki starting two-plus years ago.

20.6 mpg  with 15 and 770cc

and now with the theoretical correct values:

28.3 mpg  with 3.4 and 350cc

Real MPG is about 15.7

So it went just like I thought. It's not THAT simple always it seems?