Cascade Crew

iansane · Posted: Thu Feb 14, 2008 9:01 pm Post subject: WOT tuning... GO LEAN!

Anyone who has watched the last three years of my dyno runs has seen my AFR "graph". I use the term graph loosely. It just looks like a line across the bottom of the page. So, how do I change that? The only thing I seem to find searching through TGO's prom stuff is how to change theoretical AFR in:

Enrich Power Change to AFR Vs. RPM

I messed with that a little bit tonight, reduced the multiplier A LOT, I'm still pegging the wideband rich. It seemed to pick up a little but on the butt-o-meter but everyone knows how accurate that is. Might've just been the colder evening...

Twilightoptics · Posted: Fri Feb 15, 2008 7:17 am Post subject:

You'll be changing your secondary VE table. If you notice, your main VE table only goes so high in RPM. Then it kicks into the secondary VE table. Start takin fuel out there.

I like to zero alot of the tables that act as multipliers especially for spark. IE Power enrichment spark. I zero that table, and put all my spark in the main spark table so I know exactly what timing I'm calling for. Simplifies things.

Power enrichment AFR doesn't do much IIRC. Just set that to 12.5 and leave it and then start tuning the tables.

iansane · Posted: Fri Feb 15, 2008 4:56 pm Post subject:

Really? The major thing affecting WOT fuel is the VE tables? Wow. Right now mine peaks the amount of fuel at ~2800-3200 and drops off significantly after that. I figured there would've been another mutiplier table or something applied that I was missing. Back to the drawing board.

Dewey316 · Posted: Fri Feb 15, 2008 5:21 pm Post subject:

where is your torque peak at? Usualy your highest VE is going to be where the torque peak of the motor is.

--John

Twilightoptics · Posted: Fri Feb 15, 2008 5:51 pm Post subject:

It's VE 2. It should go from like 2800ish to like 6000-6400 in a single row table.

iansane · Posted: Fri Feb 15, 2008 6:00 pm Post subject:

Yeah, the "upper" table. I say "upper" because I've also got one that goes to 6400r's.

My torque peak is around 4700ish but it only varies a couple of ft/lbs (maybe ~5-6) between lowest and highest.

Twilightoptics · Posted: Fri Feb 15, 2008 6:03 pm Post subject:

hmmm. That doesn't seem right. There should be one big Multiple row/column table (VE 1) and one Single column table (VE 2)

Twilightoptics · Posted: Fri Feb 15, 2008 6:05 pm Post subject:

But either way. Make your changes in the VE table.

Unless you see a powerenrichment VS rpm table.

Either way fine the Map value and RPM you're in and change there. So if you're at 94KPA and 4000RPM. Change that cell.

iansane · Posted: Fri Feb 15, 2008 6:05 pm Post subject:

This is 8D, does that make a difference?

EDIT: hrmm...okay. It just seems weird to me that I should be dumping out that much fuel at WOT...

Twilightoptics · Posted: Fri Feb 15, 2008 6:07 pm Post subject:

It might. But only in what tables are there.

Now difference in what you change to make it work :O)

iansane · Posted: Fri Feb 15, 2008 6:10 pm Post subject:

These are the only things I have to work with regarding accel enrichment...

Didn't mean top highlight that specific table, just happened to be on that one when I screeshotted it.

Twilightoptics · Posted: Fri Feb 15, 2008 6:35 pm Post subject:

Okay. The "Enrich power change to AFR vs RPM" you should probably figure out how to make that table do nothing.

Basically it means that when your throttle is down far enough to engage Power Enrichment based on a specified value, this table will change the AFR by said amount.

If it's zeroed out or set to not change... then you can run all your fueling out of the VE tables.

Acceleration Enrichment and Power Enrichment are two different functions.
AE is your pump shot/accelerator pump on a carb. It's what you get when you first crack the throttle. Once the throttle has stopped moving AE will dissapate.

PE is when you've moved the throttle open far enough to the pre determined level, the computer figures you are getting on it, and adds more fuel over all.