bluenc-87

I started tuning with Crome and usually set the Target Lambda and Refer to the Lambda afr tab/option that shows afr in numbers like the wideband (example 14.7, 12.5, etc). I've read that if i refer to the Lambda Percent Differential tab/option i can tune faster by doing percentage. I'm not sure how to set the numbers in the Settings/General tab to adjust by 1% increments. As it moves some different numbers i dont know by how much...

ThE HeLLRaZoR

I have used these types of tools before. They are nice to get the shape of the fuel maps heading in the right direction. They are NOT for fine tuning tho.
You will find that accel/decel fuel and operating Temp will really affect it's accuracy.
Doing it clear down to .01 just sounds like nonsense to me

OneBadTurboCRV

The settings screen shot are for when you use PageUp and PageDown buttons. That is the amount each button press will change the table cells that are highlighted. So for instance, if you hit PageUp in the ignition table map it will change the highlighted cells by +0.25° for every button press. If you want it to change the number by more or less with every button press then you change the 0.25 in that window.

The second screen shot is of the data logging. When you use the tools at the bottom in that window and it will adjust the specific cells by the percentage shown BUT unless something has changed it doesn't work like it should so every cell has to be changed manually. If you use the auto adjust feature it adjusts the wrong way. I have gotten so used to it not working properly that I always just adjust it manually - haven't checked it in a looong time.

When in doubt play with it a bit and and pay attention to cause and effect.

Cabletie

do you know how to do it with hondata? I would like to try

ThE HeLLRaZoR

I think he's talking about using a form of "Autotune" and not how to change Increment size. Increment change is a very useful setting tho.

If your car runs decently fine, I would not use Autotune. It'll just change the Tune for the worst.

OneBadTurboCRV

The first paragraph refers to just cell changing. If you haven't made custom keystroke changes in HONDATA it is CTRL + "I" for increase and CTRL + "D" for decrease. The amount it's adjusted by can be found in the settings.

Yes, my second paragraph refers to the (IIRC) Auto-Adjust in CROME feature which is supposed to work like HONDATA's AutoTune feature. Problem is CROME's is broken (or at least it was, pretty sure it still is.)

Cabletie

I tried with hondata as well. I found the same function that tells me the %. Unfortunatly I think that the stock lambda doesn't work at all fot this things, because even if I add or subtract like 15% of fuel the % doesn't change. I thought it can be helpful while waiting my wideband but it's not...

OneBadTurboCRV

You would be wise to take my advice in your thread before you blow you engine. When you changed the fuel settings the AFR almost certainly did change. The stock narrowband O2 has an extremely limited usable range.

Here is a chart so you get the idea...

Cabletie

Yes I got the idea. I did an error in installing the hondata before my wideband has arrived, I'm just trying to make it work

OneBadTurboCRV

It's 3 plugs... swap it back to the stock ECU.

Cabletie

well not really I had to socket it back, putting the chip a resistor and resoldering all the pins. I'm afraid to overheat something or burn the ecu.. I know that an ecu cost less than an engine so If I'll not find a solution in these day I will do it...

OneBadTurboCRV

Oh, in that case leave it alone. Definitely not worth the hassle at this point. You could always try different basemaps like the ITR one. I posted a link in your other thread previously.

Cabletie

ok I'll try! thanks a lot!

bluenc-87

I was not talking about using Autotune and was talking about adjusting manually. I was talking about how to change setting to adjust Pgup/Pgdown button to adjust by increments of 1% fuel (Because i was looking/trying/adjusting by % differental cells).

VegasInvasion

It IS effective in adjusting fuel cells, IF you do it correctly. I've tuned hundreds of cars this way, and as long as you heir on the side of caution, there is no risk.

Multiple increments of 1% (CTRL-I) for a single cell is NOT accurate, here's why.

When you adjust [CTRL-J] 15% of 500, you get 575.
When you increment [CTRL-I] 1% fifteen times, you get 580.
You're not adjusting 1% of 500 each time, you're adjusting 1% from the NEW number that you already incremented.
At that point you'd be better off guessing.
Again, it's a useful tool, but aim rich until you nail the tables, then lean out from there to gain power.
Read my manual.

VegasInvasion

also a word on autotuning, it does work well if you know how to do it, but certainly isn't for fine tuning. the biggest obstacle is omitting tip-in, knowing when to start logging, and making sure tables stay smooth.

OneBadTurboCRV

I thought CROME's AutoTune adjusted backwards. I know it at least used to... Say it said it needs +10% more fuel and you hit the AutoTune button it would adjust the map by -10% instead. Maybe my stuff was just glitching IDK, but I have had the Dealer version for years if that matters.

bluenc-87

Thanks guys. You guys have been of great help.

Thanks VegasInvasion. Didn't know that was your manual. I have been referring to it a lot. Thanks for sharing your manual/info.

VegasInvasion

it's always worked right for me. as long as you don't adjust more than 10% at a time, then it stays relatively accurate. If you're more than 10% off, you probably need to adjust your injector scale. if it's more than 10% different in vacuum than under load, it's either a crappy basemap or you didn't adjust the injector offset correctly.

OneBadTurboCRV

I pulled the 10% out of the air. It could have been 0.00001% or 1,000,000% it's just a number to make a quick example. The fact remains it has always done the opposite for me of what it's supposed to. Meh, it's been updated quite a few times since I last tried it honestly, maybe I will check it out again sometime.

Then again, I have really gotten away from using CROME anymore so I don't really care LOL! Most people I know have gotten away from it and I have even upgraded all of my stuff to other platforms as well.