Lol, that look on his face when he finally puts some foot into it.
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Twin turbo GT350 test drive ThatDudeinBlue
- Thread starter Stateguy
- Start date
That's one sick ride. Very nice.
Is the flex using the O2s for content reading or does it have an actual flex sensor. I've been reading up on the flex setups for S550 5.0s and have seen people using the O2s. Why hasn't anyone figured out a way to incorporate a true ethanol content sensor with these flex tunes? I don't like relying on the O2s for econtent % changes. Hijack a useless ECU input and run a GM 5v sensor to this input. Then write the code / tables in the ECU for the reading.
It's rare for me to see another guy named Aric. Hey this Ivey you mention is a large guy? Used to run around with Chris Kinard?
Is the flex using the O2s for content reading or does it have an actual flex sensor. I've been reading up on the flex setups for S550 5.0s and have seen people using the O2s. Why hasn't anyone figured out a way to incorporate a true ethanol content sensor with these flex tunes? I don't like relying on the O2s for econtent % changes. Hijack a useless ECU input and run a GM 5v sensor to this input. Then write the code / tables in the ECU for the reading.
It's rare for me to see another guy named Aric. Hey this Ivey you mention is a large guy? Used to run around with Chris Kinard?
The flex fuel fully uses the factory upstream wideband sensors for the content readings. The only issues you would have to worry about are a faulty wideband and exhaust leaks before the upstream wideband. Exhaust leaks after it are okay, but should be fixed.
Aric, we've used the upstream O2s for ethanol content readings for a while now on these flex fuel setups, without any issues. If its not broke dont fix it, know what I mean? We get all of our E85 from a very reliable source, and train our customers well on testing E85, and which stations to go to, etc etc. Works well.
Hope this helps
To me it's not a true "Flex" setup if you have to change maps when going from 93 pump (E10) to full e85. Can your customers with FI Mustangs do this without flashing a different map?
Relying on O2s for the e content is risky. Stoich varies greatly depending on e content %. Feel free to PM me if you like.
I think that is why they tune with lambda (I think Ford calls it lambse) versus tuning with a stoich number. The lamda value is fuel/stoich agnostic. Regardless of fuel, just shoot for a number around .80 (I'm making an educated guess on the safe number) and let her rip.
I think the button that the guy was pushing just changes the boost curve? I think the ECU is taking the data from all of its sensors to change the fueling and timing automatically with that data.
I think the button that the guy was pushing just changes the boost curve? I think the ECU is taking the data from all of its sensors to change the fueling and timing automatically with that data.
@earico see above.
There is no tune switch necessary, and as I stated earlier we use tried and true fuel, and customers are trained on how to test the fuel etc etc
Sorry I am just looking for more of an explanation than it just works. Relying on the O2 to back figure e content based on fuel trim adjustments works but is a crude implementation IMO. It's all fine til there is a vacuum leak and it starts running higher timing because it thinks you upped the ethanol content when you really didn't. I can see getting away with this N/A. I'm just not a fan in a FI application.
Trying to do my homework because I am considering getting into the platform myself. I'll hit the tuner forums and see if i can get a better understanding of how accurate this is without an actual e content sensor.
Here is a great reading resource for Ford vehicles and flex fuel logic: https://www.hptuners.com/forum/showthread.php?50917-Flex-fuel
Seems to me that even Ford offical flex-fuel vehicles come from the factory using the widebands, not a dedicated sensor, to do the ethanol readings. Seems to me the programming logic has been copied from those vehicles and adapted to work for the Mustangs.
You are correct about the potential issues with this system, any leak before the wideband sensor can be catastrophic on a boosted motor.
Exactly. No Bueno.
I still don't see why someone like HP tuners doesn't hack and rewrite the code in the ECM to incorporate an actual econtent sensor. On my car when I converted it to Flex we wired the GM sensor into my smog pump input feed on the ECM. The code has been rewritten for this and tables are in there for 0-5v that reference the correct percentages. Yes it's work on the software side but it's totally doable and a much better system.
that kid is a ****tard. its depressing that someone that actually knows so little about cars can put out subpar videos and this many people watch them.
god that car is sexy
You forgot Ty, Sticks (Rons skinny ass mini me with the black Camaro), Rodney with the red coupe, Stoney with the blue coupe, and Dillard when he had his ladder bar black lx hatch with my D1 off my car on it years before the green 97 cobra.. Lol. And what was Dillard's roommate that had the 650hp eclipse name? I can't remember. You may even remember me I had the black 93gt with 97 cobra wheels with the d1 on it. Loud as ****. Lol. Man those were good times...
Aric tuned my 98 Cobra, our 02 GT (sold now) and my wife's 03 Cobra about 5-6yrs back. Both of our Cobras are still running strong.
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