Poured my egr ports.......reasonable results

[Mike T]

This is the first head and I'm not totally satisfied with the aesthetics of the intake side. Not sure what caused the slightly rough appearance?

Anyway this is how it was done.

 

[Chuck Leeper]

Looks good to go!

 

[Mike T]

Looks good to go!

Thanks Chuck.
Still a little disappointed in the roughness though. Thought it was all planed out.....the copper plate had a very smooth surface, the head and plate got a little pre heat, head was set at an angle to compensate for the way the holes intersect in the port and the aluminum was plenty hot.

Maybe the plate sealed too well and trapped air.

 

[Chuck Leeper]

Could well have been trapped gas, from the impurities in the alum.

 

[TURBOELKY]

What did you clean the passages out with first, mike? And they look good.

 

[jckcolarusso]

Good job

 

[Mike T]

What did you clean the passages out with first, mike? And they look good.

I'm glad you asked... I wanted to mention it in the original post. After looking how they are made it's 95 percent simple round holes drilled from the intake side. So If you come from the intake side with sanding rolls It only takes about 5 minutes to completely remove any carbon.

 

[greeneyegi]

Is there any performance gains from this?
I have the block off plate but still the holes.

 

[Mike T]

Is there any performance gains from this?
I have the block off plate but still the holes.

Honestly...I bet there is very little gained....I just can't stand the thought of something not being uniform as possible.

 

[TURBOTIMMER]

Looks great, Mike. Way cleaner than the first time I tried this.

 

[J-B Racing]

I did do this in the past, but after seeing hardly any gain on the Flow Bench I stopped doing it on Race Heads.
Looks good though!!