Ive searched for some time trying to understand how it works

I red the hondata webpage and some others

At wot the values should be flat line around 12.5 or should it gradually go from 14.7 at lower rpm to 12s towards high rpm

What about part throttle how should those look

Anyone have a crome table of the afr values at part throttle?

 

Try this.

 

what kind of motor is that for? or is it before dynotune?
my afr doesnt go down less than 12.4 at redline
shouldnt it be gradual like fuel maps ?

 

The table posted is a general table to give you an idea...
Air fuel ratio targets all really depend on a lot of variables such as the engine setup, fuel being used etc.

 

To the OP, everything past column 10 on what mtber provided is boost so unless your boosted which im guessing your not you can disregard everything past that point.

In other words, you will/should be shooting for around 13:1 afr at WOT

12.5:1 is a slight bit on the rich side for all motor but usually good for peak torque!

 

is it really safe to run 14.7 AFR on columns 3-5? i am on 12.1:1 comp on 91oct, and it doesnt feel good to run it 14.7. i had column 3-4 at 14.0 and column 5 at 13.8

 

Like Mtber said...its a table to give you a general idea. READ!!!

 

bro .. if you cant answer with respect, then dont answer at all. i did READ! the OP is asking for "all motor" setups, not a stock B-series setup.. I would assume all "all motor" setups have increased compression whether its 11.5:1 or 12.5:1. so my simple question is if you read is ... if its really safe to keep columns 3-5 at 14.7:1 or should they be richened slightly.

p.s. people like u makes me feel no simple - "dumb" questions or discussion can be had on public forums anymore ..

 

yes it is safe there. the factory ecu does that under closed loop anyway.

 

Generally the same AFR rules apply for vacuum regardless of setup.
Col 3, 4 and 5 are where you will be cruising at light load. You want those to be stoich and sometimes you can go a little leaner for extra mpg.

You arent going to damage anything in deep vac anyways.

 

QQ

 

I've been playing around with afr's a bit lately, this is where I'm currently at:



B20/P8R/ITR clones. Really mild build, but the motor seems real happy at these targets so far.

 

13.5 target under wot is a good baseline, I'm currently targeting 13.2 but not finished yet...

 

Is stumbling at low rpm related to this or is it a separate issue?
When i decelerate and then press gas pedal only a lil bit.
Say in press gas and try to keep the car around 2000rpm in second gear
I cand even control the car stumbling so hard i have to ler go the gas and press it again
It shakes back and forth and i cant kep my foot steady so the throttle ends up bouncing and i let go the gas
Can it be something to do with injector shutoff?

 

Sounds like you need to play around with the fuel cut. Keep an eye on your MAP values where you're having the issue. Incrementally turn the fuel cut down until it's just below the lowest level you see while not actually decelerating.

 

lol figured out what the problem was

i forgot to rese the ecu after upgrading dizzy intake and exhaust

after i loaded a fresh map on ostrich the problem magically went away.

im guessing without buying a paid version of RTP theres no way to see fuel cut?

crome free doesnt have it i belive

 

I don't know much about Crome but it should have something, maybe by another name.

 

Not true. Crome free definately has fuel cut. The only thing crome free doesnt have is live tuning i believe

 

Where is it at ive been looking through it for days but cant find it

 

finally got crome pro
heres the target afr table from the tune

but it is not the same according to afr gauge
at part throttle it was more around 14.7 and 12.4 at wot


low cam


hicam



now that i look at it if it was tuned strictly by target afr it would probably run like crap..

why dont tuners update the target afr tables after the car has been tuned to have exact numbers as they should be for the specific engine?



also why is there same exact values in column 2-6
wouldnt it be better to fill it up with rpm points and have a better rpm resolution for hi cam profile instead of leaving them unused?

 

i also just realized that when i enabled closed loop i didnt know how my target AFR tables looked and it ran leaner than open loop tune

now that i see that the tables are on the rich side why would it run leaner with closed loop?
i was under the impression that closed loop ecu tried to get AFR close to the target values and not opposite.

 

Closed loop is not based on the target table. It is based on a target voltage for either the HO2s or wideband, depending on how you have it set up.

Edit: I looked around in Crome, I'm not sure where you set up the closed loop functions in there. In Neptune it looks something like this:

 

You have to datalog and then look at your lambda table and the lambda differential table for each cell. Then you go back into the fuel tables and adjust each cell accordingly. using the autotune feature and auto adjusting maps isn't all that great at times. it is best to go in and tune groups of 4 cells individually. The more time you can spend doing fine tuning the better the maps will transition from one end of the scale to the other.

 

still trying to setup crome its buggin like a ****

RTP disconnecting and datalogging timeout lol now i know what people are talking about when they say crome is like playing lottery.

im kinda just looking around and watching how numbers change when im driving around

after intake and exhaust upgrade i have a lean spot right after idle and idle is too rich now.

 

Yeah getting Crome set up and working can be a bit of a PITA at first. Not a bid deal once you get used to it though.

Did you make sure to set up your injector and battery offsets and get your base idle adjusted before making any adjustments to the fuel table?