Some "Dynomite" Heads!

[Locobob]

If I use an electric sometimes I can pull that off if the port size is close - not so much with the air powered die grinder.

Looking forward to hearing the latest on the cam experiments

[Locobob]

Exhaust ports are getting pretty close to done now.
Here we have a template I made off of my own Stainless Works headers. My purpose in doing this is not to precisely port match but rather to give me a general guide for where to remove material. The header flange ports should be bigger than the head exhaust ports in order to discourage reversion. Most of the ports show a larger discrepancy in height as opposed to width - the one pictured is actually more of an exception as it shows a good deal of room in width. I have added very little width to the head port outlet, instead focusing on adding height. Stock height is 1.4in and the one pictured is currently at 1.47in, probably going to call it good at 1.5in. I am also removing more material from the roof rather than the floor as it presents a straighter flow path - heads in photo are upside-down so roof is at the bottom.

[LGAFF]

I bet that was some exhausting work!

[Locobob]

More "Exhausting" work!
Here the ports are almost done - presently finished with 60grit





Some of my tool selection for blending around the valve bosses, these are all 1/8in bits:

[RHanselman]

Man, wish I could see the work! the internet sucks here in Afghanistan... No pic's will come through!

[Locobob]

Originally Posted by RHanselman

Man, wish I could see the work! the internet sucks here in Afghanistan... No pic's will come through!

Hi Ron, good to hear from you - thought you were done traveling?

[Locobob]

Working on the chambers:

Rough cut - blending out the quench areas a bit.




Decided to make a template out of plexi to try and keep things consistent from cylinder to cylinder. Using the head bolt holes for alignment worked fine on the head I made the template off of - on the other head the holes were slightly off making this a bit more challenging.


A chamber after some sanding around the edges.

[Polo-1]

Look at you..... The Big Guy on the LT5.

Looking good Rob

What's your thinking on the laying out the clover leaf. I like the idea of unshrouding the valves. This picked up some cfm on mine.

[carter200]

Unshrouding is always a good thing....Opps, I did NOT put my hand up

[Locobob]

Originally Posted by Polo-1

Look at you..... The Big Guy on the LT5.

Looking good Rob

What's your thinking on the laying out the clover leaf. I like the idea of unshrouding the valves. This picked up some cfm on mine.

I'm taking kind of a middle of the road approach. Blending back the quench area enough to unshroud the valves some but not taking it out too far. I noticed most of the newer four valve designs have more of a round chamber with a taper - Todd did something like this on his 427 build. I'm not exactly an F1 mechanical engineer though so I'm staying with the tried and true. I'm basically copying what I've seen on LPE chambers here.