VIDEO : BIG V8 Power for a Jeep Wrangler JL or Gladiator and NOT from a HEMI

wayoflife

Administrator
Staff member
Glad you’re gonna do the LT4 in the JT!! You gonna put a cam in and upgrade lifters and valve springs prior to install? Or at least delete the AFM lifters
AFM will be deleted for sure. What else we do, still up in the air for now. :)
 

wayoflife

Administrator
Staff member
Great video! My Jeep was the yellow one in the shop about a minute in with the skull grille. I dropped it off and took a ride in a JK with LT1 10spd on 40's. You wont be disappointed. I cant even imagine what the LT4 will feel like! Congrats....
No way, that's awesome and glad we were able to get a shot of your Jeep in the video :)
 

wayoflife

Administrator
Staff member
BTW, for those of you who haven't seen it, Robbie posted the following lengthy and awesome history lesson on our channel.

WranglerJKLS

8 hours ago
What differentiates the LT from everything else? First let's be honest everything we see here is old technology, very old technology. By the end of World War II the internal combustion engine had pretty much reached its pinnacle. Overhead cams, multi valves, direct injection.... its s all been done, probably before most of us were born. Google the Rolls-Royce Cressy engine or even the good old Allison V12 you will be amazed at the technology in those engines, they make our engines look like toys.

The roots of the modern Hemi engine really lie in Chrysler's attempt at an aircraft engine that was fitted to the later iterations of the P-47 Thunderbolt. The engine proved powerful and could push the Thunderbolt over 500 miles an hour, but once the jet engine came onto the scene the internal combustion engines were old news. I always thought Thunderbolt would make a better name for a Challenger or Charger than Hellcat or Demon.

The LT engine runs a structural oil pan which supports a 6 bolt cross bolted main cap. Aluminum heads and block mean lighter weight and better cooling, although this has been true since the early LS from the late 90s.

Potential energy, that's where it's at. An LT1 runs 11.5 to 1 compression in a 6.2 l engine. The modern Hemi, which really isn't a true Hemi any longer due to production costs and other factors has 10.9 to 1 compression.

GM has applied the technology required to allow an 11.5:1 engine to run on pump gas. The combination of direct injection and continuous variable valve timing allows GM to do this; neither the LS or Hemi has CVVT.

What you end up with is an engine that has tremendous power, especially torque at lower RPM; this is the reason the LT 5.3 can run with the larger engines, especially when equipped with the 10-speed transmission. BTW the 10-speed transmission was developed in conjunction with other manufacturers like Ford, Honda and Toyota.

Unlike an LS3 or Hemi the LT idles at very low RPM and has tremendous torque off idle, I like to say it's halfway to a diesel with its higher compression and maximized cylinder pressure. We have run the 6.2 LT's against Hemi's and LS3's with higher horsepower ratings but more often than not the LT wins.

The new inline 6 twin turbo looks very promising but it is really nothing new. I'm a big fan of the inline 6 and it appears Chrysler has taken a look at the BMW 3 l M series engine. That's not a bad thing they tout V8 performance with better economy and emissions. Smaller displacement engines with forced induction have often attempted to replace the good old V8, like the Ford Ecoboost engine.

I drive about a thousand miles a week in Wranglers with engines from the anemic 3.8 all the way up to LT'4's and various Hemi's. Without question the LT's have the best drivability, fuel efficiency and transmissions IMO.

The day will come when the large displacement V8s will be outclassed by the smaller displacement supercharged engines and electric motors. But for now if you have a large heavy vehicle with a lot of drag it's hard to beat the overhead valve American V8 regardless of manufacturer.
 

frenchjk

Caught the Bug
That is a sweet motor going in....clearly out of our eco league out here in europe...or trailered (no fun)
 

Thardin

New member
No way, that's awesome and glad we were able to get a shot of your Jeep in the video :)
Well my wife was laughing at me after we drove away from the shop. After the test drive of a recently completed swap, I was like a kid on Christmas grinning from ear to ear. I cant wait for her to experience it when we pick it up.

The LT4 in that rig is going to be SICK.
 

wayoflife

Administrator
Staff member
So, we haven't seen your JT recently and no updates. Are they mining the ore to forge the block yet?
LOL - it's been at EVO waiting to get finishing touches but Mel has a lot on his plate so... we picked it up and will start pushing forward with things.

 

kevman65

Hooked
LOL - it's been at EVO waiting to get finishing touches but Mel has a lot on his plate so... we picked it up and will start pushing forward with things.


Missed that post. Kept checking here and thought "Man, something get lost in freight?".
 
Top Bottom