L86/L83.Flex fuel conversion with pics and part #s

Rockcrawler11

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I have a Flexfuel conversion on my 2019 LT suburban, the sensor harness under the driver side passenger door jam where the pigtail is blind plugged right by the frame rail in front of the fuel tank. 1 GM sensor and some npt push fit connectors rated for fuel systems…. I haven’t sent the tuning out to blackbear performance yet to open the E85 tables. but I will once I get back home from the road. Everything fit like factory and it looks like it belonged there in the first place. I haven’t taken photos yet but I will in about two months when I’m home.

And I’m not worried about running E85 on a 50K mile truck…. It’s had the 91 octane tune running on it since it was @5500miles, 0 carbon buildup or gunk issues
 

Slow5.0

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Well since facory dash gauges are way off im installing sh$t load gauges, plus more gauges im gonna need for the future . Hiding them all over. Here is two of fuel pressure sensors im adding, one for AEM X series fuel pressure gauge and one for Innovare ECF-1 gauge


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Slow5.0

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Fill up 2nd tank of E85. Got 80% this time haha. I need to find higher Ethanol fuel

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swathdiver

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What brand gas station was 80%? That’s actually a pretty decent %.
From what I'm learning, the extra 3-5% is not going to make a difference anyway.

My Gen IV 5.3 gets about the same mileage burning E10-E30 and E40-E85 and the Gen IV 6.2 is a little different, getting roughly the same mileage on E10-E50 and E70-E85. There are sweet spots though to maximize horsepower and mileage.
 

Slow5.0

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Well i have a lot of idling since i was working on my semi in last 2 days so i used Denali to cool.me down. Friking 95f in MO. I think it will burn more but E85 here is $2.40 vs 3.80 for 93. But i didnt do it for MPG, i did it for future mods ill be doing. Im waiting in Fuel-it BT/Raw signal output 50-150hz jumper harness for E85 sensor
 

swathdiver

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Well i have a lot of idling since i was working on my semi in last 2 days so i used Denali to cool.me down. Friking 95f in MO. I think it will burn more but E85 here is $2.40 vs 3.80 for 93. But i didnt do it for MPG, i did it for future mods ill be doing. Im waiting in Fuel-it BT/Raw signal output 50-150hz jumper harness for E85 sensor
Right, but the mpg is a measure of efficiency and cost per mile to operate.
 

Slow5.0

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Right, but the mpg is a measure of efficiency and cost per mile to operate.
I understand that but we drive V8 heavy vehicles, we didnt buy them to be fuel efficient, but its possible to get better MPG out of them and if you like to do that more power to you
 

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