E85 Flexfuel sensor

speedraider · 09-15-2017, 11:25 AM

When using the E85 Flexfuel sensor and no tune. Will the car benefit with having the higher octane as we only have 91 octane on the west coast

JB'sZL1 · 09-15-2017, 11:28 AM

Higher octane results in hp gains.

91 vs. what? E85?

IneedAZ · 09-15-2017, 11:32 AM

Quote:

Originally Posted by speedraider

When using the E85 Flexfuel sensor and no tune. Will the car benefit with having the higher octane as we only have 91 octane on the west coast

You will still need someone to activate the sensor in the stock tune. So even doing that will void the warranty. At that point just go ahead and do a full tune IMO.

zl1_tommy · 09-15-2017, 11:32 AM

Quote:

Originally Posted by speedraider

When using the E85 Flexfuel sensor and no tune. Will the car benefit with having the higher octane as we only have 91 octane on the west coast

flex fuel sensor and no tune?!

Can'tHave2MuchHP · 09-15-2017, 12:35 PM

Flex fuel sensor but no tune? K.

KyleL · 09-15-2017, 02:20 PM

Quote:

Originally Posted by speedraider

When using the E85 Flexfuel sensor and no tune. Will the car benefit with having the higher octane as we only have 91 octane on the west coast

Once it's pinned to the ecu, i would think it should be able to read the octane of what your putting into the car. Will you see a benefit? Probably not, the ecu would maybe adjust SLIGHTLY for the added octane but I doubt it's something you'd notice. Like others have said, just tune it for the e85, that way you'll really feel the gains.

Getinthur · 09-15-2017, 03:00 PM

The flex fuel sensor wont do anything without a tune, and the car needs to be tuned on E85, its not just plug and play. And to go full E85 you will need a low side pump. Dave over DSXtuning has a awesome system and package going for this right now. Without the low side pump you will only be able to get about E40-E50 before you aren't keeping the fuel pressure high enough.

TheElementalCashew · 09-15-2017, 04:21 PM

Quote:

Originally Posted by Getinthur

The flex fuel sensor wont do anything without a tune, and the car needs to be tuned on E85, its not just plug and play. And to go full E85 you will need a low side pump. Dave over DSXtuning has a awesome system and package going for this right now. Without the low side pump you will only be able to get about E40-E50 before you aren't keeping the fuel pressure high enough.

Yeah, my tuner told me today I need a pump and probably a better fueling cam to go beyond E40.

DSX Tuning · 09-15-2017, 05:40 PM

I have the golden ticket for low sides.

The sensor won't do anything until the ECM is reflashed and the function activated. FWIW, the sensor reads alcohol content which is not necessarily the same as octane.

17 White ZL1 · 09-16-2017, 11:42 AM

Quote:

Originally Posted by DSX Tuning

I have the golden ticket for low sides.

The sensor won't do anything until the ECM is reflashed and the function activated. FWIW, the sensor reads alcohol content which is not necessarily the same as octane.

So Dave with the flex fuel sensor + low side fuel system & HP tuner with a tune & Dyno from a tuner can you run E85 ? Or do you still need cam , high side etc ?

Getinthur · 09-17-2017, 01:59 PM

Quote:

Originally Posted by 17 White ZL1

So Dave with the flex fuel sensor + low side fuel system & HP tuner with a tune & Dyno from a tuner can you run E85 ? Or do you still need cam , high side etc ?

You don't need a cam, just a sensor, low side pump, and tune. DSX tuning has it all.

Cmyskill · 09-17-2017, 04:06 PM

Ok, silly question, I keep seeing that E85 has to be activated in the ECU? Are you guys saying that GM has all the fuel tables for E85 installed in the ECU and they just have to be activated or do the tuners do that? Either way just curious as to how it works...I will get a tune for sure with any fuel change/setup.

7WSM · 09-18-2017, 10:36 AM

Quote:

Originally Posted by Cmyskill

Ok, silly question, I keep seeing that E85 has to be activated in the ECU? Are you guys saying that GM has all the fuel tables for E85 installed in the ECU and they just have to be activated or do the tuners do that? Either way just curious as to how it works...I will get a tune for sure with any fuel change/setup.

Yes, the tables are there. The tuner has to turn it on. Then you can run between E85 and regular fuel without having to do anything.

jwdominick · 09-18-2017, 10:41 AM

Quote:

Originally Posted by 7WSM

Yes, the tables are there. The tuner has to turn it on. Then you can run between E85 and regular fuel without having to do anything.

"tables" are absolutely there however they are far from optimally tuned. to get the most out of going e85, you'll absolutely want a tuner to dial them in for performance

09-15-2017, 11:25 AM	#1
speedraider Drives: 2016 Z06, 2017 ZL1 Join Date: Feb 2012 Location: Las Vegas Posts: 305	E85 Flexfuel sensor When using the E85 Flexfuel sensor and no tune. Will the car benefit with having the higher octane as we only have 91 octane on the west coast

09-17-2017, 04:06 PM	#12
Cmyskill 17 ZL1 what a car.... Drives: 2021 M S PLAID, 2017 ZL1 A10 White Join Date: Apr 2008 Location: Port St Lucie FLORIDA Posts: 428	Ok, silly question, I keep seeing that E85 has to be activated in the ECU? Are you guys saying that GM has all the fuel tables for E85 installed in the ECU and they just have to be activated or do the tuners do that? Either way just curious as to how it works...I will get a tune for sure with any fuel change/setup. __________________ 2017 ZL1 -- WHT - A10 - PDR - NAV Mods: Kooks 2", Lingenfelter 9.17” 18% Pulley, CAI, E85 sensor, and Interceptor Wide-band & Gauge with Pod, 180 Thermostat, BMR Rear suspension parts.

09-15-2017, 11:28 AM	#2
JB'sZL1 Drives: 2013 ZL1 and 2019 Ram Laramie Join Date: May 2017 Location: Milwaukee Posts: 1,259	Higher octane results in hp gains. 91 vs. what? E85?

09-15-2017, 12:35 PM	#5
Can'tHave2MuchHP Drives: Fast Join Date: Mar 2015 Location: Michigan Posts: 3,696	Flex fuel sensor but no tune? K.

09-15-2017, 03:00 PM	#7
Getinthur Drives: 2017 ZL1 Join Date: Jun 2017 Location: Baltimore Posts: 66	The flex fuel sensor wont do anything without a tune, and the car needs to be tuned on E85, its not just plug and play. And to go full E85 you will need a low side pump. Dave over DSXtuning has a awesome system and package going for this right now. Without the low side pump you will only be able to get about E40-E50 before you aren't keeping the fuel pressure high enough.

09-15-2017, 05:40 PM	#9
DSX Tuning Drives: 2019 Corvette ZR1 Join Date: May 2017 Location: St. Louis, MO Posts: 316	I have the golden ticket for low sides. The sensor won't do anything until the ECM is reflashed and the function activated. FWIW, the sensor reads alcohol content which is not necessarily the same as octane.

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