Not only are they not programmed for that - I don't really know if all of the materials used would handle E85. It's 'corrosive', esp. with aluminum parts.Not sure about all of them, but my JT specifically states not to use E85 inside the fuel door. I stick with 87-89 octane. Typically 87. Dealer even made a point to tell me not to use E85.
So I am going to embarrass myself a bit here but since I've only been a Jeep owner and not well versed in this stuff yet, would you mind breaking down exactly what all that means point by point? I'm trying to learn here. Thanks in advance.As for the trans tune, they recommend it and told me that it will firm up shifts, holding longer is just the fact that it more HP. It doesnt hunt all the time like it did and increased throttle response so I could get rid of the afe scorcher and sprint throttle booster. They didn't even know about the 1500 rpm stumble, but it got rid of it. I love both and would highly recommend.
Call me cautious, but I am the kind of owner that listens to the manufacturer when it comes to most things. If they say no E85, I am fine with that. I'm not terribly interested in voiding a warranty on a $54k vehicle that I JUST bought. Call me chicken, but it seems like a bad investment otherwise.Not only are they not programmed for that - I don't really know if all of the materials used would handle E85. It's 'corrosive', esp. with aluminum parts.
I wonder - if you had fuel system issues and were running E85 - bet FCA wouldn't have to cover any damage if it was found E85 was the cause.
I don't know - maybe the materials will handle it - but risk it? Not me. Not until a few others use it for a year or two and find zero damage.
I REALLY wish these things (the JT 3.6) was optimized for E85. More power, cooler running, cleaner chambers.I am very close to pulling the trigger on the 93 tune from livernosis. I would still like to hear more reviews on gladiators before i do.
I agree, i am looking more for a little more power and smoother running engine along with better shifting. If i can get 30 more hp and some more torque that would be ideal.I REALLY wish these things (the JT 3.6) was optimized for E85. More power, cooler running, cleaner chambers.
93 octane will help as they can bump timing and make other changes to increase power a bit but the real power advantage would be an engine made for E85.
If I could convert mine to E85 for 500 bucks, I'd do it. But I don't know that these 3.6s have the compression to make them really that great with E85.
E85 engines should be made more like diesel engines, not open deck light-weight gas engines.
That's interesting as we've had 3 recent Grand Cherokees - a 2015, 2018 and now a 2021. IMO, my JT will keep up with any of them, maybe better.i called about getting it. $700 for the engine tune and another $700 for the transmission tune. The power gain looks good but the price Pretty steep.
my woman has a GC 3.6. Better tune and a way bigger intake. its much more punchy than my Jt
that only really matters when your tuning intake air vocity against the cam lobe profile and valve size. You need variable length intake runners when your cam ramp speed is very high with high lift. The air velocity has to stay high enough to feel the cylinders through the range. Its also usually done in the plenum runners not the intake track.That's interesting as we've had 3 recent Grand Cherokees - a 2015, 2018 and now a 2021. IMO, my JT will keep up with any of them, maybe better.
Her GC and those of the past were no slouches but I found my JT to be at least as good if not better.
I've not driven the 2021 yet myself, but I did drive the 2018 and '15 quite a bit and I'm not disappointed in the JT when it's not towing.
Bigger intake can be a negative. You slow the air flow, less turbulence in the chamber.
It's why Mercedes and some others use a variable runner intake - too big and you lose low end, too small and you lose top end.
They can vary the size of the intake plenum and runners to keep velocity up for RPMs below max, and open things up for high RPM.