I been trying for an hour to get his darn iPhone to search the forum. It keeps kicking me out of the search box.

Anyone have pics or flow numbers of stock and ported heads.
How do the castings look in the bowl area? Under valve seats?
How's the casting flash

Is there much gain in porting and smoothing out these heads.
I don't have a set off so I'm stuck guessing and asking for help from those who've done this.

I'm trying to get my ducks in a row before I pull the trigger on my engine build. Lots of questions to come. I'm 650 miles away from the builder and my truck, so I gotta have clear answers for the guy building the motor and the other guy putting it in for me.

Thanks guys.

 

while having mine built I asked the same thing..what i got is, on the intake side no reason,turbo will feed it.. On the exhaust,no real reason there eather but it could be smothed out some..Just to clean it up..

 

Corey who use to be on here alot did mild porting and liked it. Just clean them up. Not a real high dollar thing. He did it his self and said he wouldn't pay to have it done unless it was real resonable. So I'd say if they clean all the rough edges up for say a couple hours wages do it. If not foreget it.

 

My father and I port heads. No labor cost at all. I usually rough in the heads and he flow matches and smooths everything up a lot nicer then I do.
Typically when you look down the ports you can't see the greatest need.
Once you remove the valves and look at the seat and bowl area. The mismatch between the casting and where the seat go is sometimes horrific.
I'm not planning on extensive port work, just a thorough cleaning and smoothing.

As far as just cramming more air in, flow improves hp better than psi.
Psi is a measure of restriction, so if I can keep psi the same and increase flow, ill be thrilled.
When I went from 28 to 35-36 psi, I gained nothing but heat. Rwhp gain was insignificant compared to egt and charge temps.

 

I could easily be wrong but how much difference would it make on a 3500rpm motor?
On my old 302 Z28 sure, but on this?
I have always wondered about camshafts though.

 

Diesels are different than gas engines in a lot of different ways.
With the super high cylinder pressures a 3500 rpm diesel is like spinning a gasser to 7k.
Once you get above a pressure ratio of 2 flow starts becoming a factor because you're cramming so much air into the engine.
Increasing flow reduces heat. That's all I'm hoping for with this.

 

Valid point. Couldn't hurt to clean up the casting, etc.