Flow bench Head Porting collected work by NOSIGMA

[nosigma]

Look carefully at the first picture and the last picture of the intake port. You can see the little "ditch" just as the floor drops down into the throat. The 1/16 of an inch ditch tapers to nothing as you move closer to the manifold face. The port taper, showing that the floor is wider than the roof with increase in width taking place on the cylinder center side (same side as the exhaust port) can be seen in the third picutre.

John

[1bolt]

Okay I'm back, and sad to see I missed some stuff. John if you're still out there, I am sorry I couldn't flow that bad boy as it would have put a cap on what is one of the oldest and best porting threads on I6 jeep stuff ever, all the way back to the beginnings of this on NAXJA.

Long story short, back when we moved a couple years back, the shop space I was promised never materialized, and was followed closely by another baby girl, right about the time you were posting last July I was in sleepless nights mode with a newborn... and since the move I haven't so much as spun a wrench until recently. The bench has been in pieces since the move. I have recently moved back to my property in Culpeper and am prepping for a cement slab and a steel garage right now (well right now it's raining cats and dogs but you know what I mean).

Anyway with some luck I'll get this bad boy back up and running as soon as I can. Meanwhile thanks for the pics of that famous head, I would be very interested in some port castings but I'm gonna guess that ship has sailed, and your Rambler is back on the road.

[casual]

I've got to bump this up...I just read it all and god am I interested...I am in no way confident enough to port my own head, so I'm current looking for someone who knows a thing or 2 about the 4.0 heads to port mine. I can pay $$$$$$$$$

[Shark]

1Bolt, did you get that slab poured?

When you had the bench up did you have a chance to test the flow of any throttle body/intake combos? Id like to see what size TB flows best with a stock 99+ intake and maybe also with intake port matched to a 0331 head. I dont know much about how the bench works so i dont know if its even possible to set that up.

Do you have any pictures of the flow bench and with a head attached so I can at least have an idea as to how that thing works?

[Zorm]

Ok, Zombie thread, coming back from the dead, any progress of this? Would like to see anything on larger then stock tb on the 99+ intake

[nosigma]

1bolt

I saw that you are selling off a lot of your XJ stuff on the NOVAJeepers site. Anything up with the flow bench? Not saying I want to get back into that business, but if you lightening your load and the bench is something your thinking about getting rid of I think I can find a good home for it.

John

[crazygogo]

bump...anything new?

[nosigma]

Other than wishing that the owners of photo bucket burn in hell, no, at least not from me. 1bolt got the flow bench but ran into personal issues and could not continue the research. I guess for now Russ is the best source for performance 4.0 head work.

John

[Brianj5600]

Link to extensive head flow site.

http://users.erols.com/srweiss/tablehdc.htm#Chrysler

[SkylinesSuck]

Nice!

[nosigma]

Been 5 years since a post. Has anyone done any flow work on the 4.0 Head worth reporting or is it buried in a different thread?

John

[Cheromaniac]

I have some head flow numbers on this page:

http://www.jeep4.0performance.4mg.com/tech_specs.html