Sending heads to machine shop

[asand1]

Originally Posted By: ironman_gq
You should get the intake flanges that mate with the head milled so everything lines up when you bolt the heads back on. With milled heads that sit lower on the block than factory heads, the intake will sit too high and you may have a hard time sealing everything up and there could be a step in the port where the manifold meets the head.

Your machinist will know how much to take off, it's a very common thing to have done.


Yes, this is what I was referring to.

I had a SBC 350 in a 72 C10 where the machine shop shaved the heads without asking. The intake manifold didn't fit right, I think the angle was wrong or the manifold didn't sit low enough. Anyway the heads drew crankcase air from the lifter valley right into the intake ports and always ran lean and burned oil.

 

[EvanD]

I am far from a newbie in building up engines. Heads, I have always just purchased pre-built units. I will never ever start with factory cores again. By the time you pay for springs porting ect you could have purchased whatever is the latest head preassembled and all that.
I called a bunch of placed seeking info. Found a bunch of poor attitude and lack of callback. I have to work. I don't have all day to go around driving to different shops.
Finally settled on https://www.golenengineservice.com/ owner answered spent a little time on the phone and went over every detail. I am going for multi angle valve job mild porting and a mill. Very reasonable price. I am glad I took the time calling around.

 

[EvanD]

I have a fast LSXRT, 90mm TB and 4" intake flow into heads should be ok.
Fueling I am sure will be maxed out. I have the injectors being pushed now can't imagine after heads.

 

[Trav]

Keep the injectors at about 80% of their max flow, if you need so high flows or custom stuff PM me.
Depending on what you have do for head work a different spray pattern my be of benefit.