Just put them back to where they were in the first place. If you dial in the MAF table to hit the zero line, you will have a nice safe fuel curve. Depending on what dyno/wideband you test it on, you'll see around 12:1 in the midrange, mid 11s in upper midrange, falling off to mid 10s by fuel cut. If you use 3rd gear for all your tuning, the realtime smart offsets will adjust fueling for different gears, conditions, etc,.)

Cheers
shiv

 

Will my displacement increase and head work cause any problems, or will the table remain the same?

 

I hope the AFR issue has been explained sufficienty in the other thread. If not, here's a quick overview:

1) Shoot for the zero line. It is conservatively rich on pump gas. But not excessively so. It can be leaned out a bit above 6000rpm but the gains wont be mind blowing. Keep it safe for you and follow the tune-up directions as they are released.

2) Every wideband unit is calibrated differently. If you installed 3 on the same car, they would all read differently. Sometimes alarmingly so. And if you put one on the tailpipe a la dyno tuning, it will read much leaner than if it were put in the downpipe. So talk nominal AFRs with a grain of salt when comparing them to other systems on different cars, using different sensors in different locations. The only important thing here is that the sensor we are using is consistent and quick acting (which it is).

As for closed loop boost control, is it under development. When its done, we can use that closed loop logic on other stuff as well. With the amount of things I'm throwing at the programmers, I'd be happy if it was done and ready for testing in 2-3 weeks.

More pressing matters that we are attending to is getting the datalogs and display to show useful values (actuals degrees of total retard, load %, AFR/Lambda) since this would take one step out of the tuning-thru-datalogging practice.

Another feature we are working on RIGHT NOW is the abilty to set conditional outputs:



This would relieve us of having to use full tables to turn things on and off (launch control, fuel threshold, leanrun protect, overboost protect, etc,.) This would free of some space and give us more memory for more tables.

Cheers,
shiv

 

What would you like to know specifically?

 

You answered the question in your AFR response. I just want the datalogged numbers to be translated to useful units. Also, a range of knock values that would be considered bad would be nice.

EDIT: Will the Creader get rid of my P0420 error? I want to remove the second 02 sensor and just install the wideband there (no cat).

 

We are working on having the datalogging showing normal AFR/lambda units. As for knock values, anything much above the zero line can be considered knock. The neat thing about engines is that the noise level of a well running (no knock) motor is reasonably independant of actual hp output. In other words, the more power an engines makes, it doesn't really make much more noise. So any outliner from the normal noise floor can be considered abnormal combustion/detonation. We've tested the Zero Line in the SMART table on a number of EVOs with different set-ups. And the Zero point is always the same. With the exception of cars running stock cams. These cars don't ramp up noise above 5500rpm as sharply as cars with cams. We have not tested any cars without balance shafts... yet. I can only imagine them to have a higher Zero line.

No but the 3 unused wires on the knock buffer will It's got an o2 simulator built in. We just haven't told anyone about that yet

shiv

 

Sneaky, sneaky.

 

There would be no reason for the SMART timing or fuel tables to change. However with headwork, you can typicially target leaner AFRs at high RPM. Maybe raise the Zero point up to 21-22 range above 6000rpm instead of having it drop to the 17-19 range.

Shiv

 

Nice!

 

Cool, that is about where I was and it was runnign pretty well I think...

Actually, I put the SMART fuel table back to where it was originally and knock seemed to increase? There were no signs of knock when it was running a little bit leaner.

Thanks for the help!

 

Alky Injection/Launch Control Question!!!

The launch control table pulls all fuel sources at the set limit, or only Gasoline?

That question should be enough to let you know where I'm going with this, but for everyone else....

If the LC table only pulls the gasoline at the set RPM, wouldn't the Alky still get injected which in effect would nullifying the rev limiter and allow the engine to continue to rev albeit lean?

- Steve

 

Fuel Threshold Question

Do you have to fill this table with -100 along with zeroing out the SMART Fuel and Timing if you will not be using the SMART features?

I noticed after we hooked up the Launch Control/NLS feature we lost some boost and I had to compensate by adding more boost in the boost table. This normal?

 

To turn off SMART fuel, just set all the values in the Fuel Threshold table to -100. You can leave the actual SMART fuel table untouched. No need to zero that out since it will never be active (you'll never seen highlight box leave the bottom-most row which is full of zeros. But to turn off SMART timing, you WILL have to zero that map out. We just got the copy/paste feature working in a beta xmap that i'm trying. So you wont have to fill it in manually if/when you install the SMART hardware.

This is not normal. The LC/NLS feature has nothing to do with boost control. It only inputs the Clutch switch and outputs 0 or -100% Fuel/MAF. Might want to re-check that.

Shiv

 

The launch control feature only pulls the gasoline. But the amount of meth you will be spraying between WOT shifts is going to be far too small to make a combustion, let alone a lean-run condition. To get an example of what i mean... Instead of pulling out -100% fuel in the LC/NLS map, try pulling out just -50%. It will still misfire and pop. Try -40%. It should still do the same. It's not until you get into the -20% range will you actually see a combustion (a lean one, of course!).

So, if you chose to use Methanol in your system, cut back -100%. This may end up meaning that say, 70% of the fuel is cut.

If you aren't using Meth, you can even experiment with cutting back less fuel. Instead of -100%, try -50%. Heck, you might even want to try tapering to adjecent columns to acheive the desired hysteris/misfire behavior. So instead of going BAM BAM BAM, it will go BAM BAM BAM. Just try it out during launch conditions first before testing during WOT shifting conditions, of course

Cheers,
shiv

 

you shouldnt have to zero out the smart fuel or timing if you dont have the equipment yet...you should only have to set -100 values on the fuel threshold table...this will prevent the smart fuel table from working at all

and i dont think the SMART timing table really matters if you dont have the knock buffer hooked up since the SMART wont be able to hear knock at all so no adjustments will be made

im running mine without the SMART hardware with only the fuel threshold table zero'd out with -100 values and it runs great