Draminicus

I've searched the forum and not found anything on this. what I'm looking for is an after market head that has exhaust on one side an the intake on the other. If I am understanding everything correctly, if the intake manifold is moved to the other side, it should help to keep the air coming into the engine cooler, giving better fuel economy and more power. So my question is this, has anybody seen or know of a head that will fit this idea? Any help is appreciated.

TrailerTrash

Is this something you have seen before and cant find? or are you asking if there is such a thing?

EvstaG

Plenty of straight six engines come with crossflow heads (intake and exhaust ports on opposite sides), the Cummins and 2JZ come to mind. You won't find a head for the Jeep 4.0 that's a crossflow though, they're all reverse flow heads and I can guarantee nobody will ever put in the resources to change that.

Draminicus

Was more asking if it existed.

Do you know of any of those that will fit the 4.0 without too much trouble?

investinwaffles

Definitely not, completely different motors.

Your only option would be to custom engineer a cylinder head and have it CNC'd out or something, but you will need to go through several iterations of prototypes before you got it 100%. It would be easier to swap in a 2JZ from a Supra which actually HAS been done before on an XJ

Out of curiosity -- why do you need a cross-flow head?

TRCM

Only if you swap the whole engine into the XJ.

that is like asking if a chevy head will fit a ford motor.

andrewmp6

There is none i know of and to have it to work youd have to fully design and build the head yourself.Its a ton of work for little to no out come on it.

XJlimitedx99

Look into doing a cowl intake to bring the air temps down significantly.

Even with that, don't expect much of a gain. I get the desire to optimize whatever system you're working with but remember, you're basically working with a tractor motor.

4WD4EVER

Not gonna happen.

As waffles stated, the Supra swap has been successfully done, but, that isn't just a straightforward swap.

How much better fuel economy and how much more power are you wanting?

I'm assuming this is an XJ w/ a 4.0l you're working with?

cruiser54

It was NEVER a tractor motor!!!!!

https://en.wikipedia.org/wiki/AMC_straight-6_engine

cruiser54

Jeep had a crossflow head and overhead cam ya know......

https://upload.wikimedia.org/wikiped...L_engine-R.jpg

4WD4EVER

Ooooh! Will that fit my 4.0l? Lol!

EZEARL

Always thought this was a good looking engine. Only one I was around powered a Gladiator p/u we used in the woods to haul out pulp wood. That's where it died and stayed.
https://en.wikipedia.org/wiki/Jeep_T...e#Applications

Cummins93

Remember when there was a tractor in the Indy 500? Yea neither do I but there was a fast inline AMC 6 CYL.

http://www.worldpowersystems.com/AMC...o-turbo-motor/

There is no official dyno of Navarro's engine but they made an impression. Yes, this is kind of an apples to oranges comparison. The engine had decreased displacment with forged internals, high octane racing fuels and a smart group of experienced technichians building it.

How big was a pyrometer and AF/R analyzer in 1964? They where big standalone units. Now they fit conveniently on your dash and display in real time. Turbo manufacturing and machining has come along way in the last 50 years.

To the OP of you want power save your money and plan for forced induction down the road. Once you start adding power you won't stop. It's an illness.

XJlimitedx99

LOL I know, I know. I was comparing it a tractor motor.