Ive tried to make my offset changes and no matter what i put in, there highest HPT will read is 17.7x. I got a new wideband and it still doesnt work. Any ideas? I have the LM programmer setup like this: 0v=10afr 5v=18 (keeps getting changed to 17.98) response speed is 1/6sec. On HPT under my user defined PID for my lc1, the values are .625v+10.4 because of my offest. Is it my HPT cable?
also, when i use the default, it reads a 21.8x when Logworks reads 20.8
do you have any logs where you've logged the ouput voltage spit out by the LC1?
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
no logs, but i have an excel sheet that i got from one of the threads in this forum and i have the raw voltage for every .5 increments. Does that help?
not really..I want to see the info that is being spit out by the LC1 so we can help you figure out the correct formula.
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
ah...well ill get another log done in a bit and post it up.
here you go
btw bill, on logworks, it was reading 20.8
unfortunately I dont think theres a perfect solution with the LC1..
one of the issues is that the LC1 is a "budget" wideband....
which means that its parts are also budget...
low budget means slopy tolerances on electronics....
which in turn leads to slop...
I own an LC1...and I have sent many e-mails back and forth with innovate motorsports to try to solve this issue....
I've even tested a few "new versions" for them....
its gotten better...but theres only so much you can do on a budget...
what I like to do with the LC1 is see where my 14.7 crossing is...
lets say 10-18 AFR ....2.95volts for an example...
then I set my volts on both high and low AFR to be that 2.95.. in the LM programmer
meaning 2.95 volts = 10AFR and 2.95 volts = 18AFR
then its output would always be 2.95....
I can then look at my AFR reading in HPT....and add/subtract to my afr value till it lines up with 14.7 again...
so volts/0.625 +10(+ offset)
it doesnt have to be 7 decimal point science...the LC1 resolution just isnt that fine(nor is any other budget wideband)....and you really only need 1 decimal on fueling as well....its not going to be any better beacuse its .02 more accurate...
what matters is that you are close to 14.7...just in the ballpark is good enough....then your WOT stuff again just has to be close....
you can put the car on a dyno or take it down the track and add or subtract fuel to see what it really likes...
if its off by a fraction of a volt...its only a small amount of that AFR...less than .1 most of the time....which again is minimal...
its just the way I look at it...sometimes you have to be picky..sometimes you just have to get it in the right area code....
to me the wideband is just in the right area code...maybe even on teh right block at 14.7...but I dont expect it to be perfect
Last edited by S2H; 01-26-2007 at 10:22 PM.
-Scott -
and nino.... I thought we did that ofset thing when I was around that night....even though we didnt really get anything major really accomplished cause I got food poisoning from my dinner
-Scott -
agreed. i dont expect it to be spot on, but close. when the max for hpt is 18 and im seeing 17.7, where is it off? Is it indeed the LC1 and not my HPT cable? What if i tuned with it using the default? If its 15.7 instead of 14.7, wouldnt that work if i knew it was off? so i could still tune? cause in open air its 21.8 and logworks 20.8. Again, ballpark and being ghetto right?thanks Scott.
I say set up a custom PID for the stock settings of the LC1...so you can add in an offset...
stock is what...2.45 volts for 14.7??
see what you get....... fix it for 14.7.... then see what it looks like around teh rest...decide if you can deal with the varying offsets at other voltages
-Scott -
when i changed the values in the LMprogrammer to 2.95v, hpt is seeing 14.67-14.72. Will that work out?
thats close wnough for my ballpark.....as long as you are doing 10~18 AFR...
-Scott -
yes. in the lm programmer, i have it set like this
0v=10
5v-18
hpt is .625+10.04 and for free air it reads 17.78. i guess ill install it tomorrow and try to log it and see how it does.
i just changed hpt to read .625 + 10.2 and set lm programmer for 2.95 in min and max. HPT is reading 14.78-14.93. and when i set it back to 0=10 5=18 hpt reads 17.88-17.93. Thats pretty close isnt it? should I rely on that? To me it looks like it could work out ok. Agreed?
well..I try to get my 14.7 close as possible and not worry about teh extreme ends..after all...do you really care how acurate it is at 17.8???
or do you just need to know that its too lean...
I make a histogram that is one box...and use AFR for sensor and for axis....
then just let it sit...and after a few seconds it will stabilize....
use your afr offset to get that to stabilize at 14.7 and call it good...
-Scott -
sweet. thanks again!
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