Other than a new valve job, ill just be getting some basic line of sight clean up done to my head. Nothing major at all, but I was reading about extrude honing people have gotten done to intake manifolds and even cylinder heads. Sounds pretty good for an IM, but almost too much unless your boosted. Just my opinion based on nothing...

Im just curious if anyone has had their head or even IM extrude honed. Was it worth it, and how does it compare to other head porting packages such as RLZ or CCC?

 

Honestly.. Extrude honing is really only good with turbo applications. As they dont have a shaping characteristics... Just makes it larger & smoother.

 

its been around for a while. I would use it for parts you cant hand port but for manifolds and heads I wouldnt do it. Extrude hone polishes stuff when you port you take a lot more material out.

 

Kind of what i figured... almost seems "primitive".. just hogs out stuff and polishes. But i have to admit... it looks pretty awesome. That mirror finish and all whether or not its actually desirable.

 

if u wanna go for the 100% stock appearance and are trying to squeeze out every last hp then do it... if you just want power have it ported and polished.

 

Years ago I almost did this to my intake manifold. But I did a bunch of research first. Here are a few points I can remember.
Honda's manifold castings are much more accurate than a US domestic. That's why someone with a Mustang or Camaro can get there manifolds done and gain 40-50 horsepower, plus more cylinders.

Smoother intake runners are not always better. If you have really polished or smooth intake runners and are using OEM or another Lucas type injector your power gains would be very limiting. This type of injectors need a bit of air turbulence to disperse the fuel into the air going into the cylinder head. These injectors have a very narrow spray pattern. If you change to Bosch based injector like FIC's or ID's with the polished runners you will have much larger power gains.

Next point is if the runner shape is not efficient all Extrude Hone will do is make it a polished less efficient design.
My recommendation would be to use this is on a manifold that has been CNC’d and you still see all the machining marks. The shop that does the CNC’d work most likely has done there homework and tapper the runners, made sure they all have the same shape and volume. The Extrude Hone would be the final clean up to polish it up nice and smooth. I would also use FIC injectors.

On a Honda, Skunk2, Edlebrock manifold a dremel and sand paper can clean up and polish the runners. Just takes a bit of time.