After a few hours reading about that little difference between the Innovate AFR gauge and the Tunerstudio gauge I've realized maybe I have a grounding problem. My problem is similar to anyone who owns a LC-1: Tunerstudio readings are a bit leaner than the Innovate gauge.
Question 1: Maybe grounding the heater ground to other point which is not the MS ground will improve the readings? Now I have controller and heater ground wired to the MS ground, which is grounded to engine block. Should I ground heater directly to the battery?
Question 2: Running with this difference between gauge and MS, which one is the right one? I guess the Innovate gauge is right, because no reference voltage is needed, or if needed, it is set in the gauge.
PS 1: Yes, I have configured both outputs on my LC-1, 0-5v 7.35-22.39 for the gauge and 0-5v 10:20 for MS.
Thanks!!
Wideband grounding question
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- Master MS/Extra'er
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Re: Wideband grounding question
Should not the heater be grounded to the main chassis, and the LC-1 signal ground go to Megasquirt signal ground?
Would a discrepancy between MS and LC-1 be just to do with the calibration of the analogue signal in the MS?
Would a discrepancy between MS and LC-1 be just to do with the calibration of the analogue signal in the MS?
RX7 Series 2 13B Turbo. Megasquirt 3 with 3X Expander and V3 CPU. Firmware 1.4.1
Knock module, twin EGT, real time clock, WBO2, full sequential fuel and spark
http://web.aanet.com.au/arran
Knock module, twin EGT, real time clock, WBO2, full sequential fuel and spark
http://web.aanet.com.au/arran
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Re: Wideband grounding question
Hi arran,
do you recommend grounding the heater directly to the main chassis? I'll try this today. I didn't done the MS calibration for the wideband, I'm just using 0-5v 10-20 AFR Innovate PLX. Would be better to use Custom Linear Wideband then adjust values to match the gauge?
do you recommend grounding the heater directly to the main chassis? I'll try this today. I didn't done the MS calibration for the wideband, I'm just using 0-5v 10-20 AFR Innovate PLX. Would be better to use Custom Linear Wideband then adjust values to match the gauge?
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Re: Wideband grounding question
You're using different calibrations so you'll never get the correct value. Use the same calibration on both.nano wrote:PS 1: Yes, I have configured both outputs on my LC-1, 0-5v 7.35-22.39 for the gauge and 0-5v 10:20 for MS.
Jean
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Re: Wideband grounding question
Thank you! I'll try that
Re: Wideband grounding question
Hi, I'm observing the same difference between TS and innovate DB gauge, the gauge shows about 0,2AFR richer.
I've set both outputs to output 2,5v (2,5v @ 7,35afr, and 2,5v @ 22,39afr)
multimeter confirms 2,51v on both outputs
gauge shows 14,7AFR
TS shows 14,9AFR, and 2,51 "Front bank O2 voltage"
22,39 - 7,35 = 15,04
15,04 / 2 = 7,52
7,52 + 7,35 =14,87 AFR @ 2,5v That makes me think, TS is closer to truth...
I've also tried setting both outputs to 0v, both TS and gauge read 7,35-7,40 AFR, thats OK.
with both outputs set to 5v, TS reads 22,2 and gauge 21,8
with factory default settings 0-5v @ 7,35-22,39afr, and o2 sensor exposed to free air, TS shows 22,2 and gauge 21,8/21,9 , I believe 22,2 is closer to reality..
what do you think?
I've set both outputs to output 2,5v (2,5v @ 7,35afr, and 2,5v @ 22,39afr)
multimeter confirms 2,51v on both outputs
gauge shows 14,7AFR
TS shows 14,9AFR, and 2,51 "Front bank O2 voltage"
22,39 - 7,35 = 15,04
15,04 / 2 = 7,52
7,52 + 7,35 =14,87 AFR @ 2,5v That makes me think, TS is closer to truth...
I've also tried setting both outputs to 0v, both TS and gauge read 7,35-7,40 AFR, thats OK.
with both outputs set to 5v, TS reads 22,2 and gauge 21,8
with factory default settings 0-5v @ 7,35-22,39afr, and o2 sensor exposed to free air, TS shows 22,2 and gauge 21,8/21,9 , I believe 22,2 is closer to reality..
what do you think?
1978 vw golf gti 16v itb cop full sequential MS2
1992 vw corrado 16v moonlight blue MS2
1992 vw corrado 16v moonlight blue MS2
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- Master MS/Extra'er
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Re: Wideband grounding question
Yes, when I was running a LC-1 I grounded the heater to the chassis.
nano wrote:Hi arran,
do you recommend grounding the heater directly to the main chassis? I'll try this today. I didn't done the MS calibration for the wideband, I'm just using 0-5v 10-20 AFR Innovate PLX. Would be better to use Custom Linear Wideband then adjust values to match the gauge?
RX7 Series 2 13B Turbo. Megasquirt 3 with 3X Expander and V3 CPU. Firmware 1.4.1
Knock module, twin EGT, real time clock, WBO2, full sequential fuel and spark
http://web.aanet.com.au/arran
Knock module, twin EGT, real time clock, WBO2, full sequential fuel and spark
http://web.aanet.com.au/arran