AFR Gauge install tips requested - wire harness, mounting ideas, etc
04-12-2015, 06:15 PM
#28
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2005 MB E55 AMG
Well.... That was interesting. And I'm also installing a WB on mine. I would trust the electronics more if I haven't seen STOCK 55K cars melt down because of leaning out. And I'm one for being able to monitor everything myself. Kinda like the no dip stick thing drives me nuts. But what do I know. MB is a new to me.
04-12-2015, 06:18 PM
#29
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2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Installed over the weekend. Still modifying the ashtray to mount the gauge... it's a tight fit.
I agree that it's always nice to monitor AFR if you can. Apparently others choose to just blindly trust that everything is running correctly...
I agree that it's always nice to monitor AFR if you can. Apparently others choose to just blindly trust that everything is running correctly...
04-13-2015, 04:26 PM
#31
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2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
I'm keeping the ashtray door etc to keep it looking OE when I'm not using it. Took some work, but Dremeled out the underside of the sliding door and cut out the bottom, and can fit one gauge in there with a CF plate cemented in to keep it in place.
04-14-2015, 01:37 AM
#32
Seems like every other thread I click on has an argument in it. Lol!!! Stop pmsing and relax guys.
I've been looking for a good place to put some gauges. Looking forward to seeing pictures.
I've been looking for a good place to put some gauges. Looking forward to seeing pictures.
04-14-2015, 02:17 AM
#33
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Glad you work it out, can you post some pictures
=====================
AFR usually used for custom ECU tuning, to make the perfect air fuel ratio.
OR
you going to turbo charged your engine.
Subscribe.
=====================
AFR usually used for custom ECU tuning, to make the perfect air fuel ratio.
OR
you going to turbo charged your engine.
Subscribe.
Last edited by clichere1; 04-14-2015 at 02:20 AM.
04-14-2015, 10:49 AM
#35
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Subscribed to see how the mounting turns out.
Monitoring with a secondary AFR WB on a closed loop WB platform is redundant though.
Both will have slight discrepancies (as the sensors degrade) so which one do you trust? Your secondary (primary) sensors will either show a false positive or false negative at some point.
What is your game plan if your secondary AFR system shows lean?
What is your game plan if your secondary AFR system shows rich?
Would have been better off tapping into the signal from the OE sensors instead. Just some constructive criticism, so feel free to ignore
.
Monitoring with a secondary AFR WB on a closed loop WB platform is redundant though.
Both will have slight discrepancies (as the sensors degrade) so which one do you trust? Your secondary (primary) sensors will either show a false positive or false negative at some point.
What is your game plan if your secondary AFR system shows lean?
What is your game plan if your secondary AFR system shows rich?
Would have been better off tapping into the signal from the OE sensors instead. Just some constructive criticism, so feel free to ignore
.
04-16-2015, 02:35 PM
#36
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2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Installed and working great 
Haven't had a chance to do a long WOT pull yet. Got on it a bit this morning and saw 12.7-12.9 but couldn't stay in it long enough to get a solid reading.
Driver view no problem clear as day to read on the fly
The ashtray mount took a bit of cutting, both to the tray (gone) as well as to the underside of the door. Also had to cut out a plastic bracket underneath everything for the gauge and wires to fit. All-in-all not so bad, just a lot of test fitting, and looks OE when the door is closed. A little disappointed that the CF sheet doesn't match the internal trim, but I'll correct that over the summer.
Haven't had a chance to do a long WOT pull yet. Got on it a bit this morning and saw 12.7-12.9 but couldn't stay in it long enough to get a solid reading.
Driver view no problem clear as day to read on the fly
The ashtray mount took a bit of cutting, both to the tray (gone) as well as to the underside of the door. Also had to cut out a plastic bracket underneath everything for the gauge and wires to fit. All-in-all not so bad, just a lot of test fitting, and looks OE when the door is closed. A little disappointed that the CF sheet doesn't match the internal trim, but I'll correct that over the summer.
