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Not sure if it was said here, but the AFD maxes out at e80. It states that in the instructions.Highest ethanol content I've seen at the pumps where I live is e70. IMIO the bang for the buck mods go in this order 1) Tune 2) E85 3) headers
We have Hundreds of customers running our flex kits with no issues. In the begginning we had some module issues. but they have been 100% rectified and they are running smoothly. Flexfuel kits support any mixture of ethanol making it extremely convenient. the Problem with a 100% e85 tune is it is very difficult to know what content level you are getting every time. Flex kits take the guessing out.
Legit street cars did a really great video using our kit.
although you CAN have a dedicated e85 tune that does not utilize a flex fuel kit...i personally would not recommend this unless you also pair it with a flex fuel kit.
you will need to monitor your ethanol blend to ensure you can give it full throttle after every fill of the gas tank. If you have an e60 tune but pump e85 you are wasting money and power. technically, you'll be safe as supposedly e85 blends don't go under e60, but you never know.
one thing to note is...with higher amounts of ethanol you WILL require more injection. so if you're tune is for e60...you have a e60 tune for ignition timing, but your fueling will be set for e85...but without a flex fuel sensor, how would you know your tank has e60?...along with this, once you pump less than e85...you'll have too much fueling as your injection time was tuned for e85? parts of the country that get colder and snow will have the highest deviation of ethanol content at the e85 pump versus warmer climates.
the proper way to do it is to receive a dedicated ethanol tune but also utilize a flex fuel kit so your injection times are correct for the ethanol blend you have in your tank at any given time.
FYI...flex fuel kits DO NOT trick computers. flex fuel kits use math to adjust injection times based off requirements due to their ethanol content. all that your ECU cares about is lambda...and labmda is the same across all fuels.
if you plan to run e85 the entire time, maybe look into a dedicated tune. i'm sure where you live the ethanol content shouldn't fluctuate too much...but as always, i always check my ethanol content after fill of each tank of gas.
so far, for me...e50 has given me the best performance when matched with a 100 octane tune from OE. this makes sense as e50 equates to roughly 100 octane. throttle response and power is the best for me with that 50% ethanol paired with matching 100 octane tune.
sent a message to eflexfuel...and received this response.
Hello,
The sensor can read from 0% to 100% ethanol content.
It is meant for e85, but there should not be a problem with even with E100.
along with that here is some info in regards to the senor being utilized...
The flex fuel sensor measures the ethanol-gasoline ratio of the fuel being used in a flexible fuel vehicle. Flexible fuel vehicles can be operated with a blend of ethanol and gasoline, up to 85 percent ethanol. In order to adjust the ignition timing and the fuel quantity to be injected, the engine management system requires information about the percentage of ethanol in the fuel.
The flex fuel sensor uses quick-connect style fuel connections, an incoming fuel connection, and an outgoing fuel connection. All fuel passes through the flex fuel sensor before continuing on to the fuel rail. The flex fuel sensor measures the fuel alcohol content, and sends an electrical signal to the engine control module (ECM) to indicate ethanol percentage.
The flex fuel sensor has a three-wire electrical harness connector. The three wires provide a ground circuit, a power source, and a signal output to the ECM. The power source is battery positive voltage and the ground circuit connects to an engine ground. The signal circuit carries the ethanol percentage via a frequency signal.
Alcohol content information is supplied to the ECM from the fuel composition sensor. The fuel composition sensor has a battery positive circuit, a signal circuit, and a ground circuit. The fuel composition sensor uses a microprocessor inside the sensor to measure the ethanol percentage and changes the output signal accordingly. The signal circuit carries the ethanol percentage via the frequency signal. The ECM provides an internal pull up to 5V on the signal circuit, and the fuel composition sensor pulls the 5V to ground in pulses. The normal range of operating frequency is between 50-150Hz. The microprocessor inside the sensor is capable of a certain amount of self-diagnosis. An output frequency between 180?Hz and 190?Hz indicates that the fuel is contaminated.
Pin 1 - Battery Positive Voltage
Pin 2 - Ground
Pin 3 - Fuel Composition Sensor Signal Out
if you plan to run e85 the entire time, maybe look into a dedicated tune. i'm sure where you live the ethanol content shouldn't fluctuate too much...but as always, i always check my ethanol content after fill of each tank of gas.
so far, for me...e50 has given me the best performance when matched with a 100 octane tune from OE. this makes sense as e50 equates to roughly 100 octane. throttle response and power is the best for me with that 50% ethanol paired with matching 100 octane tune.
Yes, i will after my holidays. Here is always the same ethanol content at 100%. Is 76% ethanol.
i thought more ethanol=more power?
straight 76% ethanol from the pump should be 105 octane. more ethanol equates to more octane which also in turn aids in less likely chance of preignition or detonation. with those factors you can push more ignition timing for more gains. what you have to remember is that, with increased octane, if you don't have enough static compression within your engine, or enough boost on a boosted motor you'll get to a point where any further ignition timing advance will do nothing for power. you would honestly need 14.5:1 or more static compression in your engine to utilize e85 fully. the M156 from my experiences sits nicest at e50 which equates to 100 octane. i haven't yet tried a 104 octane tune, but i doubt it be worth it with the compression the M156 has. a 104/105 octane tune would allow you to pump straight e85 assuming your ethanol content is always above a certain ethanol content. at 78% ethanol i was going through fuel like a mad man. also, cold starts were not smooth.
as of now i blend my own at the pump. last tank i was at e54, pumped 7.8 gallons of e85(which was e76-e80 based off my calculations) and 6.4 gallons of 87 octane(e10). after 2 miles of driving my sensor read out was exactly at e50. my UltraGauge helps by being able to roughly gauge my remaining gallons based off information I've configured.
FYI... if you've installed larger injectors for your e85 kit...expect long term trims to be anywhere between -7 to -25 depending on ambient air temperatures which affect fuel temperatures.
straight 76% ethanol from the pump should be 105 octane. more ethanol equates to more octane which also in turn aids in less likely chance of preignition or detonation. with those factors you can push more ignition timing for more gains. what you have to remember is that, with increased octane, if you don't have enough static compression within your engine, or enough boost on a boosted motor you'll get to a point where any further ignition timing advance will do nothing for power. you would honestly need 14.5:1 or more static compression in your engine to utilize e85 fully. the M156 from my experiences sits nicest at e50 which equates to 100 octane. i haven't yet tried a 104 octane tune, but i doubt it be worth it with the compression the M156 has. a 104/105 octane tune would allow you to pump straight e85 assuming your ethanol content is always above a certain ethanol content. at 78% ethanol i was going through fuel like a mad man. also, cold starts were not smooth.
as of now i blend my own at the pump. last tank i was at e54, pumped 7.8 gallons of e85(which was e76-e80 based off my calculations) and 6.4 gallons of 87 octane(e10). after 2 miles of driving my sensor read out was exactly at e50. my UltraGauge helps by being able to roughly gauge my remaining gallons based off information I've configured.
definitely not as easy as just pumping e85.
Great thread/info.
Bought an Eflex Fuel kit a couple of years ago and finally hope to install soon.
I have stock injectors/fuel pump, all 4 cats replaced with 200cel hi-flow and OE tuning w/std and race map options. Just to clarify, you would recommend...
E30/40 for std OE tune and e50/60 for OE race tune with E85/std 87 as best fuel mix option...correct?
the 91/93 octane OETune really works best with simple premium gasoline. the 100 octane tune works best with e50-60. I don't have OETunings 104 octane race fuel map so I'm not sure how that performs, but I'd assume you'd want an ethanol content that matches or surpasses the octane rating of 104.
I personally blend e85 with 87 octane because it's cheaper and because it does the job without issue.
I have blended against 91 octane before and wouldn't necessarily say it was better or worse. it for sure wasn't as on point performance wise as with blending 87 but did feel like it had more octane. without a valid test I'll never know.
blending e85 with 87 always gives me the exact performance I expect. less than 50% ethanol on the 100 octane map did not feel as great to mention. it really was missing that punch in higher RPM's. lower RPM's felt fine but up top of wasn't as peppy.
the 91/93 octane OETune really works best with simple premium gasoline. the 100 octane tune works best with e50-60. I don't have OETunings 104 octane race fuel map so I'm not sure how that performs, but I'd assume you'd want an ethanol content that matches or surpasses the octane rating of 104.
I personally blend e85 with 87 octane because it's cheaper and because it does the job without issue.
I have blended against 91 octane before and wouldn't necessarily say it was better or worse. it for sure wasn't as on point performance wise as with blending 87 but did feel like it had more octane. without a valid test I'll never know.
blending e85 with 87 always gives me the exact performance I expect. less than 50% ethanol on the 100 octane map did not feel as great to mention. it really was missing that punch in higher RPM's. lower RPM's felt fine but up top of wasn't as peppy.
Much appreciated.
Just reviewed the thread again and realized you are on larger injectors - do you also have LTH?
I have a new set of oem injectors that I planned on installing at the same time (pretty certain mine are original at near 100K miles) but should probably hold off, test my set-up with different octanes, and then possibly upgrade if needed.
I do have LTH and upgraded injectors. I haven't logged duty at high rpm full throttle but I'm in very safe ranges. If you're within limits of duty cycle there wouldn't be a need for you to swap injectors. I had headers before the e85 kit so didn't bother running factory injectors to see their duty cycle.
I do have LTH and upgraded injectors. I haven't logged duty at high rpm full throttle but I'm in very safe ranges. If you're within limits of duty cycle there wouldn't be a need for you to swap injectors. I had headers before the e85 kit so didn't bother running factory injectors to see their duty cycle.
eflex is currently setting up their North American dealer market. until then they won't be shipping to NA. you can wait or go with others such as VRP, etc. they all work on the same principle and functionality.
of the eflex, VRP, and AFD flex fuel kits, they all function the same. you should receive the same performance out of each. the AFD kit according to a previous post will not support as wide an ethanol content reading range as the VRP and eflex kits. neither will require a retune, but in general, to fully utilize the additional octane and resistance to detonation, a octane specific tune would be ideal. eflex is working on expanding their hardware line up to allow sensor reading output in a future version to gauges or standalone engine computers. that product is TBD.
of the eflex, VRP, and AFD flex fuel kits, they all function the same. you should receive the same performance out of each. the AFD kit according to a previous post will not support as wide an ethanol content reading range as the VRP and eflex kits. neither will require a retune, but in general, to fully utilize the additional octane and resistance to detonation, a octane specific tune would be ideal.
There are some pretty comprehensive threads on the topic if you want to do a deep dive. Not sure if this has changed or not but last year eflex came unpinned and the installer had a bit more steps to take to install. Apparently not a big deal. That kit was also available on eBay from Finland or Sweden or some other faraway land. The Eurocharged kit is straight outta Texas. I’ve found the service on my EC kit to be above average with timely responses to questions from both AFD AND EC reps, for whatever they may be worth.
eflex kits always come with pins crimped on and connectors in the box. if you are to request different connections on the signal and output ends there is an upcharge. example for our purposes, going from an M156 Injector female using a M156 male and outputting to a EV1 female for your replacement fuel injectors.
i simply cut the other end off and crimped on EV1 pins and connector as it was much cheaper than having them do it for me.
They function the same, The eflex (the kit we sell) kit does NOT need to adjust tune. The flex sensor detects your ethanol content and adjusts the flow rate accordingly.
There WILL be a price increase from eFlex soon. Their kit is definitely a ridiculous deal at the current pricing.
@Crya If you email us, we typically respond within the Hour. On Facebook we respond in minutes. we are here to help and we have sold alot of these kits
07-01-2019, 09:05 AM
From 95% down to 65% with 100% E85.
