[qwiksilvertrav]

Hey everyone. So warranty just expired and I'm ready to mod!

At first I wasn't looking for a HUGE amount of power. I don't track my car...it's just a DD in the summer that I have fun with.

But then I saw most tunes are for 93 octane...there's literally no 93 around where I live or that's convenient, let alone on road trips. Max of 92 only and on road trips 91. But E85 is plentiful and right down 2 blocks from me for fill ups!

So that's why I've decided on a flex fuel set up with the bonus of extra HP. I can fill up on E85 pretty regularly or the other octanes when away from home with no worries.

Looking for the best bang for the buck on this one.

So my questions are:
Who did your flex tune and what's the exact setup you got for it (parts, tuning etc)

How has the experience been? Can you just fill up with 91 and hammer it and it's all good? Or pussy foot it to give the PCM time to learn? I used to own a SRT-4 E85 and fully aware of the horrible gas mileage, rough starts etc.

Who's the best bang for the buck out there for this? Or better yet, who's the best?

Been shopping the vendors and they offer different packages that are all over the place. I have no idea what pully to go with, if I need a under etc. I'm a newb at E85 supercharged cars. lol What's the best E85 set up, at a good competitive price and puts out decent power. I'm not trying to go all crazy with power, this is for the street but it'd be nice to have it when I want it too.

Thanks in advance for sharing. Ready to learn about this set up and decide who I want to go with!

 

[parttimer]

Dusteroff did my flex, I run a 2.8 griptech, ported snout/blower with spacers, FIC 1200 with catless pipes and LMI, I went dual pumps as well. I pinned the crank when I switched to this from a pump gas only 2.8 pulley. I also went with a straight E85 tune with a 2.6. Curt uses the stock wideband for E% so you have to give it a bit for it to recognize if you have changed fuel. I run 92/93 and E85 with the flex setup.. Barth and Satera 9sp) use a sensor I believe at the rails to give exact real time, that is the setup you can fill up and pretty much ready to go out of the pump. I see about 12mpg on average from E85 and 16-18mpg on regular gas. If E is regularly available may as well go with an E only tune and switch to flex for road trips.

 

[Unholy707]

I would like to see data and fuel tests to see if these “flex fuel” tunes learn the ethanol% correctly

 

[parttimer]

I have data logs showing it reading upward of 70-75%.

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[ScLeCo]

As simple as A B C
A) Pick a shop, any reputable shop will do.
B) Ask them.
C) Follow their advice.

 

[Unholy707]

I have data logs showing it reading upward of 70-75%.

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All that does is show what the learned value is. That doesn’t mean that it’s correct.

 

[Unholy707]

As simple as A B C
A) Pick a shop, any reputable shop will do.
B) Ask them.
C) Follow their advice.

Been in this game for years. It’s tough to trust even reputable tuners these days. Especially after they get “hellcat famous”.

 

[Unholy707]

Also, the flex fuel calibration? It was structured for the 3.6. Entirely different engine. If you actually read through the patents and understand how (at the time FCA)’s calibration infers ethanol content, you begin to see just based on the difference of hardware that it could never be completely accurate on the hellcat or any v8 platform for that matter. A lot of it is also based on the evap system. Lots of stuff I don’t think the tuners pushing these flex fuel tunes out even know. If you run a flex fuel tune in a cold environment or during winter months, you’re going to have a bad time. Change your oil every 2500 miles, and I guarantee you it is degraded from E85 washing the cylinders due to cold weather.

 

[Unholy707]

Which is also why I would assume starting in 2018+, you may start seeing some cars (or track hawks) blowing up using this calibration due to the evap system changing.

 

[parttimer]

All that does is show what the learned value is. That doesn’t mean that it’s correct.

And when you compare it to the tester?

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[qwiksilvertrav]

Dusteroff did my flex, I run a 2.8 griptech, ported snout/blower with spacers, FIC 1200 with catless pipes and LMI, I went dual pumps as well. I pinned the crank when I switched to this from a pump gas only 2.8 pulley. I also went with a straight E85 tune with a 2.6. Curt uses the stock wideband for E% so you have to give it a bit for it to recognize if you have changed fuel. I run 92/93 and E85 with the flex setup.. Barth and Satera 9sp) use a sensor I believe at the rails to give exact real time, that is the setup you can fill up and pretty much ready to go out of the pump. I see about 12mpg on average from E85 and 16-18mpg on regular gas. If E is regularly available may as well go with an E only tune and switch to flex for road trips.

So your part list is:
2.8 Pulley
Pinned crank
Dual drop in pumps
FIC 1200s
Cracked PCM with tune
Diablo Sport Trinity

I'd skip the ported snout and blower spacers for now.

Probably looking at around 5k in parts and tuning?

 

[Unavowed]

Also, the flex fuel calibration? It was structured for the 3.6. Entirely different engine.

No. A flex fuel tune would be written in HP Tuners by the tuner. O.E. 3.6 engine calibration doesn't come into the equation. As a life long GM guy, I don't know why flex fuel is such a mystery in the Mopar world. GM's have been tuned that way for almost 20 years now. Loading different tunes for different fuels seems like a recipe for disaster to me. Flex fuel is definitely the way to go in the hands of a competent tuner.

 

[16GoManGoHC]

My flex tune hits the numbers pretty close but it took ALLOT of tweaking on gasoline to get the injector trims bang on 0% every where not just idle to get it right. Running straight 93 now, tests at exactly 10%, car says it’s 8-12%. Back on 80-85% E car was saying it was 78-82, plenty close enough. And numbers in between during the transition from E to 93 where within 5% as well, very good for Inference calculating E %. I only use my flex tune while on gasoline and during the transition between the 2, when I can run dedicated high % E fuel (80%+) I run a dedicated E85 tune for max power

 

[Unholy707]

No. A flex fuel tune would be written in HP Tuners by the tuner. O.E. 3.6 engine calibration doesn't come into the equation. As a life long GM guy, I don't know why flex fuel is such a mystery in the Mopar world. GM's have been tuned that way for almost 20 years now. Loading different tunes for different fuels seems like a recipe for disaster to me. Flex fuel is definitely the way to go in the hands of a competent tuner.

Yes. The actual calibration tables (and underlying ethanol Infer logic which not even up tuners has visibility into) are from the 3.6 (with a few additions). It’s nothing at all like the GM world where they patch the OS from a different rom that had the physical flex fuel sensor.

 

[parttimer]

So your part list is:
2.8 Pulley
Pinned crank
Dual drop in pumps
FIC 1200s
Cracked PCM with tune
Diablo Sport Trinity

I'd skip the ported snout and blower spacers for now.

Probably looking at around 5k in parts and tuning?

I used HP tuners, you're pretty close on cost, Dusteroff or any of the tuners will have a package price.

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[Unholy707]

My flex tune hits the numbers pretty close but it took ALLOT of tweaking on gasoline to get the injector trims bang on 0% every where not just idle to get it right. Running straight 93 now, tests at exactly 10%, car says it’s 8-12%. Back on 80-85% E car was saying it was 78-82, plenty close enough. And numbers in between during the transition from E to 93 where within 5% as well, very good for Inference calculating E %. I only use my flex tune while on gasoline and during the transition between the 2, when I can run dedicated high % E fuel (80%+) I run a dedicated E85 tune for max power

Good info there, thanks for posting. That’s why I said I’d be interested to see the data. I think a lot of people miss that the car has to be tuned PERFECTLY on 91/93 first before you flip the switch for the alcohol learning. You have a 2016, correct? Also, do you tune the car yourself? If so, great job

 

[qwiksilvertrav]

As simple as A B C
A) Pick a shop, any reputable shop will do.
B) Ask them.
C) Follow their advice.

I hear ya but I'd rather hear results and feedback with these multiple shops here rather than walk into it blind.