The BEST Jeep Wrangler Engine Upgrade

[smcewen]

The 4.0 was the best engine jeep ever used, bring it back!

[lacyfins]

What he explains translates to, you gotta tune for mods man!

[Original_SJB]

Plastic oil cooler housing replace with Aluminum is truly a maintence upgrade to reduce failures

[thebrucechannel]

Keep the engine stock, save your money for suspension mods.

[DrivenHard]

He addressed exactly what to change, the PCM. A simple tune can unleash some extra performance without causing other issues

[ghiodastelian]

I had to do an upgrade on my jeep engine, replacing the cracked plastic oil filter and cooler housing with an aluminum one.

[fairlylocal]

I agree 100% with this. I drive a 2003 TJ 4.0 but I think for any vehicle used for overlanding or any kind of long distance off-roading. You want every inch of reliability you can possible have. If you start trying to make more power you potentially shorten your engines lift span and run the risk of having issues while in the middle of nowhere.

[SlotSoldier]

Upgrades can be internal as well and not just bolt on parts. I’ll be honest though I agree with this video to an extent because the factory does build an engine to last, but only in ideal conditions. Nobody and I mean nobody puts their vehicle through ideal conditions. So upgrading known factory flaws with better parts is always my recommendation, for example the oil filter housing being plastic when it should at least be aluminum. With this being said more power can be obtained by internal parts such as cams and bigger pistons also going with heavier duty parts helps(such as forged internals).

[LivingTheDream-OffroadUSA]

K&N Air Filter and AEV Snorkel would be my response, but nothing else. I got 4 mpg increase from this and it feels more responsive when I get on it. I have the 2021 JLUR V6 Etorque.

[camaroboi]

I downsized my v6, gave it 16:1 compression, added a turbocharger, and used diesel fuel. Best upgrade ever.

[wolfaja]

All of that is true if you don’t tune your vehicle. If you modify it then get it retuned it’ll perform better, also more airflow doesn’t necessarily mean more dust and dirt particles.

[matthewhoffman]

Change out the oil filter house for the full metal one if you have the 3.6l

[DidierBan]

Engineering Explained made a video with 3 air filters; OEM, Autoparts and “high performance “.
The OEM filter was the one that gave better results.
Test was made in a Subaru engine.

[seangordon]

The pedal commander . It gives more response to throttle. Highly recommend

[henryharder]

Put a turbo on and run 5 psi boost on it even without a tune you'll gain about 80% more power no matter what the ecm says until you melt a piston I tried it twice that's how I know

[graywolf.overland]

100% right. Never mess with tuning and air intake performance mods

[oldteck]

Finally somebody that's speaking the truth I've known this for so many years I keep telling people you can do whatever aftermarket unless you change your intake and throttle and exhaust which in my opinion includes heads because if you've changed your throttle body you're throttle body is tuned to the heads to the intake and exhaust manifold and intake an exhaust valves to be tuned if you change one or the other you might as well change them all to really do something different but then again your longevity of the engine disappears

[risenlabs]

Less restrictions mean your engine can breathe better making power more efficiently, the ecm isn’t going to close the butterfly because your getting better flow.

[thegreenerthemeaner]

Here's the thing. Since the earliest vehicle with a PCM, no one is allowed to change the emmissions at idle or cruise speed. Under acceleration is entirely different. Add all the items you want, but you won't change anything about how it rolls along until you push the accelerator down. Lots of new vehicles won't accept a free flowing air filter. That's how sensitive the systems are to changes. You want to get rid of the lag in your accelerator, get a BANKS Pedal Moster.

[Direwolf]

As some one that worked on jeeps for years, I highly agree with this.