Port Match Jeep 4.0 Intake Manifold 

Thank you, glad you liked it and found it helpful.

Wow thanks ... I appreciate that

Thank you I appreciate that..

Yes please lets see this article

Horse hockey ; any time you reduce turbulence by matching things up you increase the performance.

I was told by an old time engine builder, that this style of port matching most likely would gain several foot pounds of torque in the mid rpm range, and should also have a improvement in throttle response. But such as Martin said in his video, I was told that it is best to leave about 30 thousands of material around the edge of the gasket port holes to help with turbulence and to also help prevent vacuum leaks..

Good idea, thanks for the tip.

That sounds like a good idea, then if you changed your plans, you could just clean off the marker with some solvent.

Thank You

+martinbuilt ..my pleasure Martin...;-)

Thank you, I'm glad you liked i

Thank you John I appreciate that.

Thank you...

Thank you! Cheers!

@@martinbuilt You're welcome :)

I personally haven't tried it yet on my 4.0 but I am currently running the Bosch 280156161 that are 12 hole that work well. I think the Denso 12 hole injectors may be a little too much for the 4.0...

Jim Miller you lay gaskets an surface that you want to match and take brass hammer and tap gasket around the edges. Cut out marks or use some heavy paper in the same manner then trace to gasket

+matt sez and....larger inlet area is still reduced by the size of exhaust ports.....doing one and not both makes no major diff

its more complex than that. because of high and low pressure zones. Depending on the application,you need to priorise the velocity instead of volume capacity.

If you have tried many brands, & 1 of those is the Fel-pro thats the higher end/quality 1. I'd make sure u bolting all the intake and exhaust bolts on correctly in the correct torquing sequence and correct torque value. When my exhaust manifold cracked bad, I used the Fel-pro 1 on my 1998 Jeep XJ. I have 4.0L in-line 6 in it too & used the Fel-pro when installing a new header instead of manifold and upgraded the engine mounts(main reason most the exhaust manifolds crack/not just heat). I did the bolts/nuts for mating the header and intake in the pattern my Haynes manual said to and to the torque value it said. I have 55-65K miles on it since then and no exhaust leaks.

thank you

Lol have fun with that. Definitely not easier and won't gain anything over what he's doing. Plus would take a lot longer & cost a lot more.

IIRC.... their are water jacket hole differences ..... IIRC again, the 4.2 has more holes but i KNOW it can be done.....need the right gasket for sure (cant remember if ya need the 4.2 orr 4.0 gasket howeverr) should be a lot of info about this online

I first made the gasket match the head then transfer the gasket to the intake manifold, so both intake and head match perfectly.

martinbuilt Ahhhh, that explains it, thanks.

He is matching his heads ports to his intake. The gasket was cut out from the heads ports, so is like a stencil or template of his heads ports when he puts it on his intake and removes the metal from those ports. Which now makes them "matched ports" like the title implies, so no he doesn't have to remove material on the head. I believe he said the head is a new Edlebrock head so definitely don't remove any for multiple reasons like warranty, already how they need to be for good performance, Edlebrock has done R&D to get the part right so y fix whats not broke, and etc. If factory I guess he could remove some, but then u have to remove it from the block before doing that so no metal shavings get in there, & to clean out the metal shavings. Really not worth it vs just matching the intake to them and doing what he did then polishing them up for smooth air flow.

Jeep manifold is pretty open, I would assume hitting it with compressed air and just rinsing it out would be enough.

These kinds of mods can only be seen on a dino.

Not necessarily. The mismatch between intake and heads pretty much exist on all 4.0's

Lots of water, simple-green, degreaser, parts cleaner... or a hot tank are all good options that work well.

+Kenneth Cohagen I have the Elelbrock head will be installing it soon.

+martinbuilt great! Please let me know what you think of it!

martinbuilt was it worth the money?

Ayy I'm doing the same build. If you're doing a t5 from a mustang, what tb do you use? Using a multipattern amc bell off a spirit for this

+Joshua Doustou (jdsupa15) The gasket I used to port match (intake/exhaust gasket) is one that I made. In my opinion is the best intake/exhaust gasket made.

I let you know as soon as I install it. It's been sitting here in the box now for 2 years or more. I have the 0630

when will you do the eldenbrock head, I'm curious about matching ports also.

+Rick Agosto I got everything at Lowes, all made by Dermal.

yes it is. I matched it to the Edelbrock cylinder head

I WANT THAT CYLINDER HEAD SO BAD! Sadly it costs as much as two of my XJs...

Yes I made it from scratch and I use the method that I show in this video to make the temp plate for the gasket. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-txCBBO_mI1Y.html I made the gasket from the cylinder as those ports are large then the intake.

no, I don't

The tool that I'm using is a Dremel with a wade

+tk106 I don't know, as I haven't installed it yet. I have the new Edelbrock cylinder head and was going to change the intake when I change the head. Even if I had changed the intake I don't think it's something your going to feel. The only way your going to see the difference is on a dyno.

Whoa Weezy I personally have never seen a OEM gasket but that certainly could be the case.

martinbuilt ok great thanks great video

The mod is basically designed just to help improve air flow from the intake to the cylinder head. If the engine pulls more air from this modification the ECM will easily adjust the air fuel ratio.

@@martinbuilt thx for the reply, thats exactly what i was thinking just a fuel trim mod by the ecu,cheers

I haven't installed the intake yet. I also have the new Edelbrock cylinder head and was going to do both at the same time. I matched the intake to the new cylinder head.

Looking at your intake reminded me I wanted to hack up a couple intakes and make 1 larger intake with 2 shorter paths to the TB for all 6 runners, to make a 3 stage intake. Long for low rpms, shorter in steps based on rpm. It won't make more but it will shift the tq if I do it right : )

why? just get a offenhauser 4 barrel intake and throttle body with injectors. The injectors are batch fired anyway and if your boosting then what he did is more then enough. just a larger valves and a voodoo cam will free up 100+ hp

a 100hp?....a 50% increase from cam and intake?.........doubtful.

sorry to revive an old post, my cousins and i use to buy old junk vehicles(mostly trucks) and just port and polish the heads and intake and we got big gains. so much so it was a wow factor for a "free" mod. defiantly worth the price of a few gaskets.

+Biking&Jeeping I haven't only because my Cherokee is my daily driver and I'm sure that would be more then a weekend project.

+martinbuilt My jeep is also. I think i am going to start getting all the pieces and plan on parking it so i can do it. I love what you have done with yours. Your my go to for knowledge. Great videos

+Jason Finlaw It would be fun to do dyno runs for all the modifications to see what work and how well it works, but its not in the budget. I doubt I'll see any mpg increase .

+martinbuilt theoretically it should be about 2+hp/3ft lbs. unless it creates more turbulence before the cylinder. I understand the budget, that's why I read and watch videos first. lol

Can't say yet I haven't installed yet. Should be soon. Not working right know so I got time.

MrHilbillybob1 I have not yet installed intake manifold. I have a Edelbrock cylinder head that I'm going to install at the same time

Jaime Sustaita the idea is to improve the airflow anytime you can make a smoother air flow path you will gain horsepower. Of course this is only one step next would be to Port the heads improve the exhaust system and air intake system.

Yes, I wish I had one.

+TruthWarriorFilms This reduces the air turbulence from intake to cylinder head. This would beneficial with other modifications. Like CAI, header, free flow exhaust etc.

+martinbuilt - Ok, thanks... Keep up the vids, good info.

sheldon bertram. that is the 99 and later

martinbuilt ok I was wondering if it will work on a 96.

sheldon bertram yes it will fit a 96 but you will need to get I believe it's the power steering pump or belt tensioner mount from the newer model

I was referring to the cylinder head

LOL ... after all these years I still got that Edelbrock aluminum cylinder head sitting in the Box and that intake on the Shelf and still haven't got around to installing it. It's on the list. There's no reason it wouldn't work.

Well put it together on good short block bro,.. We are all interested in seeing and hearing it run...

The gasket really didn't have much to do with it other than it was a means of transferring the info from the cylinder head to intake manifold. The reason I did this was because of the mismatch from intake manifold to cylinder head.

I don't think you're entirely getting it I match the intake ports to the Head because they are smaller than the cylinder head. I used the intake gasket to transfer from the cylinder head to the intake manifold. The only reason I made my own gasket is because there was no gasket out there that match the cylinder head perfectly.

This really has nothing to do with using the gasket after he's done. He is using the gasket only as a template/stencil to port his airways on the intake manifold, so they match his cylinder head. Its a cheap gasket that when used to do what he did, is a great and inexpensive way to match your ports for a better airflow for more horsepower, torque, and throttle response. Try only commenting when u actually know something on the subject at hand, instead of being a smart*** in a comment that only makes u look dumb.