What can I do to increase speed or horsepower?

[d k]

the ONLY way you can run ethanol without a sensor is if you drain the gas and fill it with straight E85, or have another way of tuning for that EXACT mixture.
If the mixture is off, your tune will be off.
the flx fuel sensor is really cheap. Its made by Continental and outputs a 0-5V linear signal depending on the amount of alcohol.

If Livernois is saying the jeep comes with it then
a. They are lying
b. The jeep is ok with Ethanol

You can run E85 without an ethanol sensor, but only if you are specifically tuned for it and always run it. The only cars that have one as standard (that I know of) are flex fuel vehicles that can run whatever. The reason Jeep says not to run E85 is (I believe) because it does NOT have a sensor for it. I imagine the components can handle the alcohol content since standard gas can have 10-15% depending on where you live, I don't know how much of a difference there would be to run 85% vs the 15% from a materials standpoint.

The only benefit I can see outside of just wanting something that will get off the line quicker is when towing, but if I were doing that often enough to tune for it I wouldn't have a Gladiator for that job. I already have a car that will get off the line like a spanked ape, I don't need that in a Jeep

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[anavrinIV]

the ONLY way you can run ethanol without a sensor is if you drain the gas and fill it with straight E85, or have another way of tuning for that EXACT mixture.
If the mixture is off, your tune will be off.
the flx fuel sensor is really cheap. Its made by Continental and outputs a 0-5V linear signal depending on the amount of alcohol.

If Livernois is saying the jeep comes with it then
a. They are lying
b. The jeep is ok with Ethanol

I come from the Mazdaspeed world where guys run various ethanol mixes because ethanol + turbo = enough torque to do lots of damage. mazdaspeeds do not have ethanol sensors. they do get the black death in the high pressure fuel pump over 50% though.

Given the variance is fuel at different times and locations there is some variance that can be run, likely around 10% given that standard gas contains "up to" a certain amount. As long as the mix is within a reasonable range the tune will work.

I'm sure the engine has a couple of knock sensor to pull timing if octane is too low but that should only be a concern in higher load situations where detonation can do damage.

This is, of course, dependent on vigilance of the owner to make sure he runs the correct fuel at all times. Around me E is not easy to find so I will not go this route, but it's absolutely possible to do

 

[Alabama Mud Machine]

Why is the hemi easier to integrate?
LS fits much better

This is true, but the SRT 6.4 Hemi is already offered in a Jeep (SRT Cherokee Trackhawk). So they have factory ECM's already setup to integrate a 6.4 Hemi with the Jeep EVIC and BUS systems. It's almost plug & play....Then a custom-written program & reflash to work with the Gladiator/JL systems.

Whereas the LS and the Mopar systems speak different languages, therefore you have have a standalone custom made ECM (translator), to actually be able for the 2 different systems to communicate properly with each other for proper functionality.

Like I said, I'm definitely an LS guy, and have been for 20 years. And honestly, anything JK and older, I would most definitely go LS. But when it comes these new Jeeps (JL & JT) with all these fancy 8.4" screens integrated into the ECM's and fancy EVIC displays, etc... Not to mention for ease of installation and form and function, the Hemi swaps will be EXPONENTIALLY easier to swap into a Jeep, being that both are MOPAR products.

 

[DreamedofaJeepSomeday]

Like I said, I'm definitely an LS guy, and have been for 20 years.

OK, for us newbs, what is LS?

 

[anavrinIV]

OK, for us newbs, what is LS?

GM V8 platform. First debut as the LS1 in 1997 corvette, followed by use in the Z28 camaro and Pontiac Trans Ams. They used various versions in corvettes until the introduction of the C7 generation in 2014, in pontiac GTOs and G8s, Camaro SS, Trailblazer SS....any high performance GM vehicle had an LS. The CTS-V got a modified version with a supercharger.

for the 2014 C7 vettes they moved to the LT engine, a new family but with an LS derived layout, and subsequent cars have been phased to it as well. GM trucks have an iron block version of the LS (aluminum) as an LQ engine.

 

[Factoid]

I'm assuming that's not legal to drive on the street. Or, is there some way to make it legal?

Legal in every state, but California. I just went through Texas inspection.

The LS is the newer design GM V8. I put one in my LR Defender. The 6.2 LS and 6L80 auto from a 2012 Camaro.

 

[Alabama Mud Machine]

OK, for us newbs, what is LS?

Like was stated in the post above, it's a GM V8 engine platform they've been using in the Corvettes since 1997. They've been using the LS platform V8 engines in all their passenger vehicles since 1999.

 

[Factoid]

The biggest advantage of the 6.4 hemi over the 6.2 LS other than keeping it in the Mopar family, is that everything else works perfectly as it should. The engine and new tranny are 2014 Grand Cherokee (brand new crate), custom radiator, billet tranny to TC adapter and a bunch of little things.

Completely transforms the Jeep. It is a different machine.

 

[Shootist]

I could imagine with the added 2.8L of displacement that it is a completely different experience and a heck of a lot of fun to drive.

 

[kelkolb]

The biggest advantage of the 6.4 hemi over the 6.2 LS other than keeping it in the Mopar family, is that everything else works perfectly as it should. The engine and new tranny are 2014 Grand Cherokee (brand new crate), custom radiator, billet tranny to TC adapter and a bunch of little things.

Completely transforms the Jeep. It is a different machine.

Is it still an 8speed ZF trans?

 

[Klutch]

Legal in every state, but California. I just went through Texas inspection.

The LS is the newer design GM V8. I put one in my LR Defender. The 6.2 LS and 6L80 auto from a 2012 Camaro.

Good to know, thank you. I wasn't sure if an engine swap would violate federal EPA standards. Apparently not.

 

[Factoid]

Is it still an 8speed ZF trans?

It is an 8HP75 ZF. I will say with my 4.10 gears and 37s, in 8th it does 85 at 2000 rpm all day...at least until the next gas station!

 

[kelkolb]

It is an 8 speed, not sure if it is made by ZF. I will say with my 4.10 gears and 37s, in 8th it does 85 at 2000 rpm all day...at least until the next gas station!

How is the gas mileage?

 

[d k]

Im ver familiar with Mazdas also. Currently building a MZR/Duratec block as a matter of fact..


we are talking about different things here....

Ethanol compatable engine is not the same thing as flexible fuel engine.

what you are talking about is having a SPECIFIC ratio of gas/ethanol and tuning for that Exact ratio.
That is just an ethanol tune. Just like you would have a 93 tune and 87 tune.

Flexible fuel is totally different.
it uses a base tune map thatis infinitely variable based on how much ethanol is in the tank.
You could have 10% ethanol and the cumputer richens the fuel and adds a little timing. If you are running 50% Ethanol, computer adds a little more, etc.
you never have to adjust anything manually once the tune tables are set. You are free to run all gas or all ethanol or any mixture in between.
For that to happen, the computer needs a signal, and that signal comes from a $100 sensor that is placed somewhere in your fuel system.

Livernois advertised and confirmed they have a FLEX FUEL TUNE.

The only way for this to happen is for a sensor to exist.
So it either has to be there from the factory, or added aftermarket.
Livernoise confirmed that the sensor was there from the factory.

So, are they wrong?

I come from the Mazdaspeed world where guys run various ethanol mixes because ethanol + turbo = enough torque to do lots of damage. mazdaspeeds do not have ethanol sensors. they do get the black death in the high pressure fuel pump over 50% though.

Given the variance is fuel at different times and locations there is some variance that can be run, likely around 10% given that standard gas contains "up to" a certain amount. As long as the mix is within a reasonable range the tune will work.

I'm sure the engine has a couple of knock sensor to pull timing if octane is too low but that should only be a concern in higher load situations where detonation can do damage.

This is, of course, dependent on vigilance of the owner to make sure he runs the correct fuel at all times. Around me E is not easy to find so I will not go this route, but it's absolutely possible to do

 

[d k]

LS is (was) the new small block Chevy

OK, for us newbs, what is LS?

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