Don Terrill’s Speed-Talk

Gary, did that chamber mod allow the flow to shift more towards the cylinder wall?

Are these off the shelf Pistons your getting? I.E.) make sure your not getting someone else's headache, like custom made Pistons with the top ring land cut too close !

You would do yourself a favor to pick up the new edition ( winter 2017) of Enginemasters mag!

Yes, that too !
I don't know what if any off the shelf Manifolds there are for those?

700 hp starting from what 400, or 500 hp?
You need to think about carb placement it terms of the fuel bowls ( slosh) with them up so high and cornering on the street!

With your set up compression wise in terms of reducing back pressure on the Exh stroke, I would go for the bigger Exh valve installed by means of a valve job that picks you up a bunch low lift flow for better blow down of the cylinder! I would not care if the port after the valve being installed did...

The effect of mill on chamber depth can effect the pressure recovery factor,and good pressure recovery is a very high thing on my list of good things for making the best power with a given amount of air flow. I am not saying this is cut in stone as some chamber designs realize the power gains you wo...

Pdq67 you must have a lot of time on your hands for that?
You would be better off trying to use acid to enlarge areas!

If you can as you say cut , grind and weld then go that route!
If we are talking about a Intake Manifold I would guess ,you will be able to also get the needed port area which The EH process could never do!!

I am shotting more for crackle free flow then bigger high lift numbers with what I posted, just to make it clear.

Charlie One thing to keep in mind is that on any parallel valve wedge type head is that a good deal more Exh enters the bowl on a angle from the center of the chamber and makes a B line for the cylinder wall side of the bowl! In regards to this to me it means the trough on that side of the bowl and ...

Quick and a tad hand?
If you have awell stocked hobby center near you some of them stock Dence blocks of metal for melting and casting things .

Have these heads that you want reworked been run before, and if so please give details of that motor and include the VE seen on the dyno pulls.

You do not even need to go to 6k to make 600 hp, and it can be done with Oval ports!

Hell, I can yank 220 cfm out of the badly bent up iron Pontiac center Exh ports with just one hours work, where as I have spent a combined 3 hours of grinding and flow testing on a iron Ford 460 late model head head just to yank 184 cfm out of it and this was aided by stepping up to a 1.75" val...