I'm Ryan from extremeterrain.com.
In this episode of Throttle Out, we're going to be adding some big power and torque numbers
to this four-door JK.
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Jeep content.
So like I said, this is all about adding power.
Today, we're going to be installing the Sprintex non-intercooled supercharger for this 3.8L
engine.
That's going to give us a lot more power for the street and for the trail.
Now, this Jeep doesn't have a big lift and big tires that are robbing a lot of power.
But either way, having that extra power is going to be helpful when merging in traffic
and when hitting the trails.
In fact, this Jeep has a TeraFlex leveling kit on it, and a set of wheels and tires that
would've come on a Rubicon from the factory, even though this is an X trim Jeep.
This does have a couple of other mods on it that I want to show you before we actually
pop the hood and start wrenching on this thing.
So starting up front, we have a Barricade Trail Force HD front bumper, a set of auxiliary
lights, and a winch up front as well.
Under the hood existing, we already have a set of Gibson headers and an Airaid cold air
intake, trying to pull a little bit more power out of this engine from the factory.
Over here on the side, we have some Smittybilt tubular side steps already installed, just
to help you and your passengers get in and out of the Jeep a little bit easier.
Finally, around the backside of the Jeep is a Barricade Trail Force HD rear bumper to
match the front one, and a dual outlet exhaust.
So that's everything that's currently installed on the Jeep.
Now, let's get under the hood and start wrenching.
Today, we're going to be installing this Sprintex Supercharger on this JK.
A supercharger is, of course, a great way to add some additional power to your Jeep.
Now, that's probably not going to be your first stop, because it is an involved install
and these are a little bit expensive.
But if you're looking for some pretty big horsepower and torque gains, forced induction
is a great way to go.
This Sprintex Supercharger is a root-style supercharger, which is a little bit different
than the centripetal style that you might get from RIPP.
This root style is going to be on-demand power that's going to be right there the second
you put your foot in the pedal.
What we're hoping to see out of the supercharger is around 50 horsepower and 50 foot-pounds
of torque.
That's going to help us when we're on-road merging in and out of traffic, and when we're
off-road and need a little bit more power to get over that obstacle.
As you can see, we've done a baseline run, and we had right around 160 horsepower and
192 foot-pounds of torque as the Jeep sits right here.
Now, we'll go ahead and run it with the supercharger installed, and see what kind of gains we get.
So as you can see, the Jeep definitely made some power.
We had 50 horsepower and 30 foot-pounds of torque max gains.
The peak gains, while they were at the top of the RPM range, were around 66 horsepower
and 61 foot-pounds of torque, which exceeds our expectations.
Now, you're not going to be in this 5,500, 5,600 RPM range all that much.
But when you are merging in and out of traffic, or you're hitting it hard on the trail, trying
to get over an obstacle, you are going to see these RPM ranges.
So you are going to have that additional power.
Well, let's get this thing off the rollers now, get it out on the road and out on the
trail to see how that extra power actually feels.
So this is always the best part of a build like this, actually getting this Jeep out
on the road to see how this thing feels.
We had it on the Dyno.
We know what the numbers are.
But what does that translate to on the seat of the pants Dyno?
How does it actually feel driving down the road?
That's what we're figuring out now.
The first thing, right off the bat, you fire this thing up and you get that blower whine,
which is really cool coming out of a Jeep.
It's something you usually expect out of a performance car.
This thing is definitely whiny, and it really has a cool sound to it.
Then, that first time you put it in first gear and you start going, you do notice the
torque.
Even in the low RPM, this thing is definitely torque-ier.
Then, when you get it on the road and you actually start driving it, you take off from
a stop sign, you merge on the highway, you'll definitely notice the extra power that you're
getting out of the supercharger.
I mean, it's not going to break your neck, throwing you back in the seat.
It's not a race car.
It never will be.
It's always just going to be a Jeep.
But now, it's a Jeep with a supercharger.
It sounds awesome and it definitely feels a lot healthier than it did when it was NA.
This thing is a ton more fun to drive.
If you have the budget for it and you want a little bit more power, I think this is definitely
a good option.
I have to say, the tune that comes in the box with this supercharger is very good.
This thing, it drives really, really well.
There's no lag.
But at the same time, the throttle response isn't crazy.
It doesn't make it hard to get it in and out of gear, and get it off the line.
It doesn't have any weird RPM issues.
There's no Check Engine light.
There's nothing like that.
I'm really excited to get this thing off the road.
Not doing any hardcore wheeling, but to get it off the road and see how it feels there.
So we got this Jeep off the road now.
We're just in a grassy field.
We're not going to be doing any really hardcore wheeling.
But we know what the horsepower and the torque feel like when you're on the road.
We know how much it helps when you're merging in and out of traffic, on the highway, or
starting from a red light or a stop sign.
But I really want to see, in an off-road situation, how much that torque and that horsepower really
make a difference when we're doing a hill climb.
I think there's a hill right up here that should do just fine.
I'm just doing a little ripping around in the field here.
It definitely has more power than it did from the factory.
It's definitely more fun to blast around, usually, somebody who likes the more technical-style
off-roading, hitting the rocks, doing some slow-speed crawling.
But I have to say, being out on a grassy field like this and being able to tear around, get
into second gear, really romp on this thing with the supercharger, is a ton of fun.
Here's that hill that I was talking about before.
This is really going to show us what that low-end torque will do.
I'm just going to stick it nice and easy, get to the bottom of it, spin around, and
then head back up to the top.
Well, it definitely didn't bog down.
That was first gear.
I gave it a little bit of throttle, came up the hill with a little bit of speed, and it
definitely does feel healthy.
We don't have huge tires on this Jeep.
But if we did, the additional horsepower and torque we got from this would definitely be
helping to turn those as well.
Well, that's it.
You saw us doing the build.
You saw how the horsepower and the torque help on the road, and also off the road in
those hill-climb situations.
I hope you enjoyed watching us build this Jeep.
Make sure you subscribe to the YouTube channel to check out other great builds and other
Jeep content.
Throw a comment down below.
Let us know what you think about this build, and what you think we should be building next.
For now, I'm Ryan from extremeterrain.com.
Remember, when in doubt, Throttle Out.