TT_Vert

iTrader: (12)

The Wideband will read 14.8 steady but HPT historogram fluctuates wildly between 14.9-15.1. I read something about different grounds but is that what is going on and can I fix it? .1-.3 AFR is quite a bit of difference for my tastes.
Thanks
dave

horist

is the ground from the LM1 connected to the ground wire on the EIO cable? Also the LM1 device is configured for 0-5 volts 10 to 20 AFR right? (if it's only off by a few tenths then I'd imagine it's setup properly but covering all bases)

TT_Vert

iTrader: (12)

yea 0-5 V
0V=10AFR
4.995=19.99AFR

The LM1 is being powered by a cigarette lighter. I have the black wire from the EIO going to the ground of the LM1 ouput and the white wire from the LM! to output 1 on the LM1.

Dave

jimmyblue

iTrader: (11)

I don't consider +/-0.2 AFR to be "wildly" but... I would check
the LM-1 display, and export voltage "smoothing" settings.
The unit can be set up to filter / smooth them independently.
Maybe the display is more heavily filtered than the export
voltages.

TT_Vert

iTrader: (12)

well the thing im saying is the lm1 display is steady as can be and HPT is moving around .3 higher then the display. And its varying .3 millisecond to millisecond when the LM1 is rock steady. I'll look into export voltage smoothing. I just want to make sure i dont have some ground difference issue seeing as the output voltage is always at least .1 higher then the LM1s display and up to .3.

Dave

TT_Vert

iTrader: (12)

i just looked in the lm1 book and in the LM programmer and saw nothing about voltage output smoothing. Can you give me a bit more info about this?

thanks
dave

JNorris

iTrader: (4)

Look on page 15 of the LM1 manual.

See link below:

http://www.innovatemotorsports.com/s...Manual_3.0.pdf

John

TT_Vert

iTrader: (12)

ahh i did read that actually. I didnt know if i wanted to slow down the actual response. Another thing I read was that I could set the voltage output to a constant voltage and measure the actual output voltage of the LM1 output and then change the output voltages according to the actual voltage output vs. programmed output for a given afr.

dave

TT_Vert

iTrader: (12)

i also wonder what the actual LM1 display uses for a delay if any to display that nice smooth AFR.

parish8

iTrader: (6)

i wouldn't sweat .3 diference in afr. i dont think it is that critical.

TT_Vert

iTrader: (12)

to me .3 is huge. When I tune my car i have it at 13.0 the entire WOT 1/4 mile run. Id hate to have it go 12-7 to 13.0 to 13.3 etc.

Dave

parish8

iTrader: (6)

.3 isn't huge. the wideband it there to get you close. from that point you tune for best power without knock.

i have ran my motor from 11.2 up to 12.2 and there was virtualy no diference in power or knock supresion. with that in mind i err on the safe side just to give me a little more time to see if there is a problem(like maxed fuel pump) before it heads to far lean.

TT_Vert

iTrader: (12)

I realize it may not be huge to most but to me it is. The LM1 displays smoothly, i want to get HPT to display the exact same data as the LM1 display as IM no longer tuning via lm1 display rather HPT display. Obviously you are tuning for forced induction and I dont feel like tuning "getting it close" and watching for knock. Just because it isnt knocking doesnt mean the AFR is adequate or close enough. I Just want opinions how to try to get the LM1 display and HPT the same, not debate if .3 is a big difference.

Dave

horist

log the raw voltage... it's linear from 0 to 5 volts... if the voltage in is what's throwing it off then may want to ask the folks at innovate as well

TT_Vert

iTrader: (12)

im going to set 10 AFR at 2V and 20 AFR at 0V so i can flatline the voltage and see what the output voltage is in reference to the 2V it should be. I think that'll help me figure out if its a voltage offset issue and if so i can probably just correct there.
Dave

TT_Vert

iTrader: (12)

ok did some logging and averaging. W/ the flatline output set at 2.40V I get 2.42V. This in itself is only 1/4 point in AFR change so I dont think that is my problem. When the WB02 is reading 14.8-14.9 the output to HPT is displaying 15.1-15.3 or so. I tried to change the refresh from instant to 1/3 second and it didnt slow down the display to HPT any either. So im just going to lower the AFR at 0V and 5V to lower the entire scale down about .15 AFR and watch it I guess to see how accurate it is. Anyone see any flaw in this logic?
Thanks
dave

YellowToy/A

iTrader: (1)

Is the display correct or the the voltage. What is the WB reading in free air. Both on the display and voltage and in HP tuners. Did you cal the WB. If you wanted to get within a point I think you should have got a lab grade WB not the LM1. Lab grade wb cost 1000 - 3000. They cost that for a reason.

TT_Vert

iTrader: (12)

yellow toy i dont have to have a perfect reading. I just want the LM1 to coincide w/ HPT display since I wont be looking at the lm1 display anymore after I get this setup and calibrated right. Ive tuned w/ the LM1 and am confident its readings are accurate and I want the HPT display to match the LM1 display for tuning purposes. I have done a free air calibration but that wont really affect what im experiencing. Basically the lm1 displays say 14.8 AFR and HPT will display 15.1 or so on average. It seems to be .2-.3 high at 15 AFR (The middle of the range). So i figured if i could get 15 AFR dead on (LM1 displays same as HPT) the entire range would be pretty accurate. The lm1 AFR display isnt perfectly stable so its hard to watch the LM1 display, check the voltage w/ a voltmeter and do the calcs. If I could get the lm1 to read a steady AFR at given AFRs i could measure the voltage and set the HPT WB02 scale accordingly but I cant.

\Hope this makes sense.
Dave

YellowToy/A

iTrader: (1)

Dave What does the WB read in free air. U know what that is u calibrated it. Base all u do on that. Free air is a know value. The display does not up date very fast. The analog out is very fast. If the WB changes in free air u will have to live with it.

USE the FREE AIR value it is known. It will not change.

TT_Vert

iTrader: (12)

in free air its 20.9 I think. Problem is at 20.9% that is out of the range of the calibration (max is 20 I think.).

I think ive got it to within a tenth now of the lm1 display. So the LM1 display actually is slowed down to read steadier? IF thats the case that'll put my mind at ease. The voltage output varies about .07V or so at any given AFR which isnt that much now.

Dave