Stonehenge

It’s all starting to make sense now. Thank you all for the detailed clarification!

After I install the sensors/kit I am getting mixed messages. BlackBear will turn on the ability to run E85 via a tune update. Is this all that is needed to reap benefits from e85? I want flex ability to swap between e85 and 93 pump without having to reflash a tune each time. With this in mind what BlackBear is suggesting makes sense. They offer a 91+ tune and turn on ability to run flex after the sensor is installed. They are saying that the 91+ tune with flex option turned on is all that is needed to run E-85. But will I see performance benefits this method or does this simply give me an option of running alternative fuel type? I am getting mixed messages, others are saying I need a tune specific for E85 to reap performance benefits. I reached out to BlackBear and waiting to hear back but was curious if anyone has done flex conversations with BlackBear tune and can chime in on experience.

I guess I am not patient enough. I ordered the DSX kit then after doing so got all of this great advice. Oh well... I constantly see inquiries about easy performance mods. See Headers, CAI, Cat back pretty common but seldom see mention of FlexFuel conversion. It seems to be the best bang for your buck performance mod whether you spend $300 like I did or get it accomplished for under a $100.

I'm not exactly sure what's the difference.

So I reached out again with BlackBear and they stated they can absolutely enable the flex fuel routines for a flex fuel conversion kit. The sensor has to be installed prior to any tuning being provided. Of the two flex fuel conversions, CJ or DSX, I think I am going to go the DSX route. Appreciate the input CamGTP!

Thanks for the insight. And to BlackBear's defense I am sure they were acting under the assumption my vehicle was already flex fuel compatible. It wasn't until after I inquired that I realized it wasn't.

I have a 2017 5.3l non flex fuel l83. Looks like there are some conversion kits out there. CJPerformance (http://www.cjtunes.com/store/flex-fuel-conversions/14plus-gm-truckssuv-flex-fuel-conversion/) offers a conversion kit. Anyone done this? I have a BlackBear Performance tune, I inquired about an E85 tune before I realized my vehicle was not flex fuel. I was told that I don't need an E-85 tune specific, that the 93+ tune they provided me would work with E85, that the computer would adjust to the E85 fuel. Would that logic change if I use this CJPerformance kit?

L83 5.3 2017 z71. I installed Corsa cat back, then afe cai, then tune with blackbear performance. That was a great set up. I literally just installed kooks lt 1-3/4 about three days ago. Haven’t retuned it yet but let me tell u, it is the most noticeable butt dyno upgrade yet. Easily as much as cai, cat back and tune gave me combined. But it is friggin loud. This set up does stick down below the frame about 3 inches so be aware of that. That’s a concern of mine if I go offroad. Right now I am enjoying the upgrade and can’t wait for the retune. But can forsee adding a resognator in the near future to quiet it down.