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1
JACKAL / Columns 1-12 actual value
« Last post by [email protected] on January 10, 2018, 04:22:38 AM »
Can anyone tell me if there is an approximated value for the load index on columns 1 through 12?
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WEREWOLF / Re: Aem wideband don't match
« Last post by hakcenter on December 18, 2017, 10:48:51 PM »
That guys was always off by 0.6, if this remains true to yours, you can setup a programmable, and make it match your gauge output, by varying the low / high until you reach a good linear line.
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WEREWOLF / Re: Aem wideband don't match
« Last post by eclipsegst1990 on December 17, 2017, 08:12:02 PM »
Thought this article on the AEM site might help a little.

http://aemelectronics.com/?q=forum/aemtuner-and-guage-not-reading-same
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WEREWOLF / Re: Aem wideband don't match
« Last post by eclipsegst1990 on December 17, 2017, 03:54:46 PM »
I am grounded to the ECU ground.  I tried that a while ago, but didn't fix the problem.  I will try to get a few more points.  Now the voltage readings are coming from the Werewolf logger.  If the analog gauge output is wrong with the AFR values, wouldn't the voltages be wrong too? 
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WEREWOLF / Re: Aem wideband don't match
« Last post by hakcenter on December 17, 2017, 02:02:09 PM »
I need to find the super super old old aem pdf, cause those linear values don't cut it.

It is just (2 * x) + 10 for p0 / p1, which we all know is wrong.

Using 1.15 / 2.46 really makes it like,
(4.86586386*ln(x))+10.31993741

I have some old mmSD code that I used from the super old pdf and inputted everything by hand, in a 256 byte array from 0v to 5v.
Basically 0.01953125v per 1 unit, starting at 0
Code: [Select]
//AEM UEGO Unlinear
if(WB02Unit == PREFS_WB02_AEM) {
static const UInt32 interp[256] = {
8410,  8423,  8437,  8451,  8465,  8479,  8492,  8506,  8520,  8535,
8550,  8565,  8580,  8596,  8611,  8626,  8641,  8663,  8684,  8705,
8727,  8748,  8769,  8791,  8812,  8834,  8855,  8876,  8898,  8919,
8940,  8962,  8982,  8996,  9009,  9023,  9037,  9051,  9065,  9079,
9094,  9115,  9137,  9158,  9179,  9201,  9222,  9243,  9265,  9288,
9310,  9333,  9356,  9378,  9401,  9423,  9446,  9467,  9488,  9510,
9531,  9552,  9574,  9595,  9617,  9638,  9659,  9681,  9702,  9723,
9745,  9766,  9787,  9809,  9830,  9851,  9873,  9894,  9916,  9937,
9958,  9980, 10001, 10022, 10044, 10065, 10086, 10108, 10129, 10150,
10172, 10193, 10215, 10236, 10257, 10279, 10301, 10323, 10346, 10368,
10391, 10414, 10436, 10459, 10484, 10512, 10539, 10567, 10595, 10622,
10650, 10678, 10706, 10735, 10764, 10793, 10822, 10851, 10879, 10908,
10937, 10966, 10995, 11024, 11053, 11082, 11111, 11140, 11168, 11197,
11226, 11255, 11284, 11313, 11342, 11371, 11405, 11441, 11478, 11514,
11551, 11587, 11623, 11660, 11695, 11731, 11766, 11801, 11836, 11871,
11906, 11942, 11978, 12014, 12051, 12087, 12124, 12160, 12196, 12233,
12274, 12317, 12360, 12403, 12445, 12488, 12531, 12573, 12616, 12659,
12702, 12744, 12787, 12830, 12872, 12915, 12959, 13003, 13047, 13091,
13135, 13179, 13223, 13267, 13317, 13367, 13417, 13467, 13518, 13568,
13618, 13669, 13726, 13784, 13842, 13900, 13957, 14015, 14073, 14131,
14195, 14259, 14323, 14387, 14451, 14515, 14579, 14644, 14716, 14787,
14859, 14930, 15002, 15074, 15145, 15218, 15297, 15376, 15455, 15534,
15613, 15693, 15772, 15852, 15939, 16025, 16112, 16199, 16285, 16372,
16459, 16547, 16640, 16733, 16826, 16919, 17011, 17104, 17197, 17295,
17411, 17527, 17642, 17758, 17873, 17989, 18105, 18231, 18388, 18545,
18702, 18859, 19016, 19174, 19331, 20430
};
UInt32 v = (interp[d]) / 100;
return StrPrintF(s, "%d.%02d", (UInt16)v, (UInt16)(v % 10000));
}

I'll try to convert it today and see what I can come up with.

Basically unit, 58.88 which lands at 9.51:1, don't think that matches up to the gauge :/

V * 2 + 9.3 is closer but also not it. If you can... get more points so I can plot it out, it should start to match up with some equation.

Also something quite important about matching gauges, they must share the same ground as the ecu. So I would highly suggest grounding the gauge to the ECU ground, and not any random frame ground to help get consistency between the 2. The same goes for measuring voltage output from the gauge itself, make sure your ground on your voltage reader is to the ECU ground

I can tell you from personal experience working with my he351ve turbo controller, when I am programming and monitoring the device through the USB connection, my ISR for counting engine rpm, is different, when I am just connected through bluetooth (not using a different ground ie PC), so sources and grounds really matter in this type of stuff.
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WEREWOLF / Re: Aem wideband don't match
« Last post by eclipsegst1990 on December 16, 2017, 11:59:39 AM »
11.0 afr my voltage was about 1.13 or 1.15 volts.  When I set the aem to provide volts for 14.7, I got 2.46 volts.

**This doesn't match.  The 11:0 at 1.13v kinda matches the P2 column, but the 14.7:1 at 2.46v kinda matches P0 column.  I got this 14.7 voltage by disconnecting the gauge as stated in the gauge manual. 

Maybe I'm reading this all wrong.  Your 64bit brain might brain might be able to figure this out.  My 8 bit doesn't cut it, lol. 

Anyway, should we use my values and do something like what the video in this link suggested?  See reply #2

http://forums.ds-map.net/tuning/has-anyone-got-the-aem-35-8460-to-log-properly/

It should also be noted that there is a theory that the gauge analog output cannot drive the ecu directly or properly and that a buffer circuit may be needed, but I haven't seen anyone post anything about this working.
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WEREWOLF / Re: Aem wideband don't match
« Last post by hakcenter on December 15, 2017, 07:19:05 PM »
Can you get me the AFR to voltage table for the gauge ? Since it's not linear...
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Tuning / Re: Has anyone got the AEM 35-8460 to log properly?
« Last post by eclipsegst1990 on December 09, 2017, 12:46:21 PM »
11.0 afr my voltage was about 1.13 or 1.15 volts.  When I set the aem to provide volts for 14.7, I got 2.46 volts. 
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Tuning / Re: Has anyone got the AEM 35-8460 to log properly?
« Last post by eclipsegst1990 on December 09, 2017, 12:44:51 PM »
Thanks for the reply, I really appreciate it.  With some research I saw that this guy got it to work, but werewolf would require a tad bit more programmability in the gauge programming section.  Its great already, dont get me wrong, but is there a way to implement the rich and lean lamda points like this guy was able to do.  I have my voltages for 11:0 afr and 14.7 afr.  Take a peek at the video and you'll see what im referring to. 

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Tuning / Re: Has anyone got the AEM 35-8460 to log properly?
« Last post by hakcenter on December 08, 2017, 02:58:28 PM »
The gauge is most likely logarithmic and thus will be pretty much impossible to match.

The best I ever did was in the old palm, and it had scalar values for each .1v or so. Nothing super programmable.
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