penguininatux

lol so instead of a -36 correction percentage across the board what should i do? yes its a 2.2 toyota celica with 460cc injectors. the stock were like 210cc or something. i thought my 2 pics of my car in the sig/avat. would give it away.. but yeah just a FYI.

Or to rephrase the question... After finding out the right fuel correction for like stock (no boost, just to compensate for the larger injectors) how many % is it common to go over to run rich and "tune down" or (lean out) from? if that makes sense. :P

well let me know

Thanks .

Boosted_StinkyNuts

Hes tunning w/ an afc... Maybe it was just my experience but just tunning part throttle kinda left high cam a lil poopy...But this is just my experience keep in mind. Now on crome, uber, turboedit I agree %110 w/ you.

boosted_b16

yes -36 is a guess, if you can do the math then you may come up with a better starting number, i only suggested it because its a starting point that will work, its not rocket science to tune an afc for low and high throttle, its sooooo ------- simple, just do it like i said and start making adjustments and watching the wideband, i guarantee you'll make it happen...

penguininatux

lol thanks for the confidence. boosted_b16.

anyways.

im hoping that the 12 correction points (instead of safc I that had 8 ) make it a little better for tuning. but i have nothing to compare it to lol.

if i went like -30 is that a dramatic increase in fuel compared to -36? like if it was a 14:1 would it go to a 10:1 just from 6 percent? im just curious on like how much a percent actually changes an A/F ratio? im guessing 1% is more of a change the larger injector you use.? is that right? becuase i've never used an safc but kinda have some common sense... just thinking logically. :P

thanks.

StanB

Since you have a wideband sensor, you can make the change(s) while the car is idling and see how it affects the air/fuel ratio.

penguininatux

before reading this here's SOME OF what i have if it helps u help me with my problems.

celica GT 2.2 turbo.
.57 trim
moved from 213cc to 460cc. (read in toyotanation to do this)




alright. installed injectors and setup what i thought was a fairly good start for a tuned safc II. I did like -45 % and increased 1 or 2 percent through 1k intervals. <-- just a rough depiction. anyways. i started it up with logworks started on the laptop and got a reading of like 10.5:1 in IDLE. it was really rich. so i tuned the first fuel correction point on Low Throttle (30%) to -%50. The max i could go. Still yeilded low elevens. So i gave a little gas, maybe 15-20 percent throttle and it was alright for a second as it was at like 11.5:1, but as soon as i let off the gas to shift back to neutral the laptop jumped quickly to like 18-20:1 and then like 18, then back to 10.0:1 as it returned to idle. oh yeah and i forgot to remove the checkvalves. so would that be a problem? I KNOW YOU'RE SUPPOSED TO NOT USE THEM WITH A SAFC, BUT I JUST FORGOT (but dont htink it would make any difference at idle, or even at boost because the map sensor signal is being intercepted by the SAFC) but i could be wrong.

it seems like i just need smaller injectors. maybe 360cc or something. But the "spiking to really lean" all of a sudden.?? i have no clue/ or guess about that.

would this have anything to do with "sensor type" or having my settings at "4 cyl" and the arrow pointing top right?

Just wondering because i've never used an SAFC before this

Anyways.


let me know what u think

Dan.

penguininatux

anyone?

Chris Harris

Get rid of the check valves with the AFC...

(1-(210/460)) = .54 or 54%...i dont even know if you can go that high on a AFC but you would want to be slightly under it anywho...

does this Toyota have a MAF or MAP...i am assuming it came with vehicle specific directions and you followed them to the "T"

might be best if you have someone else drive while you mess with the settings and watch the wideband

start slowly, tune part throttle first and idle and get the hang of it, make sure everything is working nicely and you know what you are doing, gradually increase the load you are putting on the engine will you learn

penguininatux

yeah but then the 5% injecter latency changes the 54% to 49% (which is in the SAFC fuel correction range; max is %50). and i can get it to idle atabout 11-12. and when i step on it, even with full negative settings im gettin like a 9-10 A/F ratio. wayy to rich. and it runs like ----. So u think i just need smaller injectors? oh and i when i let off throttle i go really really lean. for like a split second.( like a really quick spike to 30:1). is this normaL?

and also i have the "ETC" setting set to 4 cyl, arrow up. Sensor type is Pressure 3 in 3 out.

anyways. let me know what u think.

penguininatux

sorry to be bitching again. but you know how everything never seems to work out sometimes.

So here's the issue.

460cc's in (stock 220cc for sure) High impedence
apexi safc II
Innovate wb o2.
MSD 2 BAr Map Sensor

The 2 bar map sensor helped a lot to lower the voltages and enable me to use less correction.. It dropped the map voltage from 4.555v to 2.250v. So i could tune close to "No correction" (0%). At Zero i wouuld idle at about 13.0. But when i even hit -1% correction my idle sounds really sparatic. like goes from 1800rpm to 1400rpm and then back up in a matter of a second or so. and repeats over and over. And it seems to idle really high (ie :1800-2000) also.

has anyone had this problem?

I can tune at postitive %'s fine but i dont really want to for idle because its too rich.

Anyways let me know.

Thanks.