5/16 208 valves. No flow numbers but we'll see

Looking good.

Who ported them and what valves are you going to go with?

ferrea valves. The guy that ported Them works for well known shop did them on the side so can't reveal his or her name sorry but thanks one step closer to going down the track

I had aways heard 5s were no good or may be you have better castings how much power can be made with them

Brian from Imm Wil be screwing it together and putting on the pump. He's going to determine the cam said should be in the neighborhood is 625. 650

They look good. What's the build?

They can make very good power. My Ex car was a Duster with a 422w5 motor. That wasn't set up on kill.
The new owner of the car stepped the motor up in several ways. It's been 9.60's at 140 mph at 3220. This on super stock springs footbraking. That's making very good steam.

Love W5's! Best all rounde head IMO. Maybe Edelbrock should have copied an already good design with better casting techniques. Would have been a winner in my book using parts still available like rockers, studs and headers.

W5's have a bad rap and rightly so because the early casting were garbage and while the later ones got better, there not always good. My own current W5's ported out to 298 cfm @ .600 on a 4.03 bore. (They went over 312 on a larger 4.185 bore. Not the intended bore size of the current project. Which will use Rod Bloomers big crank.)

Porisity cancelled any further porting. Epoxy was used on a single port and a pushrod hole had to be tubed as well. Further porting on the head would just create problems for at least one port. The others are a mystery. So there is a gamble involved with the head. I am going to gamble on another set I have.

I was hoping for a better head to port further. Getting cancelled at the level I did was disappointing but not a end all. There is enough cfm there to get where I want to go, but I did want more cfm for raising the bar later. I feel like the ceiling is low due to the head.

Do know that the current available Edelbrock Magnum head & Victor head (really nice flow curves on the Edelbrocks) or the W2 are better bets to port and use for power. Hughes engines have some really nice CNC programs for the Magnum heads that flow very well. I have not seen a W2 port out as well as a W5 head cfm wise, but I have seen a W2 run a high 9 in the 1/4 in a well prep'd drag car.

MP also had a head they recommended as a W5 replacement. But cost is rediculous! I forget the particular head they recommended.

But how much power can you get out of a W5 is how well it can be ported (& live)
The lay mans way of looking at potential power from a head is cfm X's 2. 300 cfm could equal 600 hp. The actual number to multiply cfm escapes me. I'm sure there's a good fella here to post it for us.
(And yes, post it yet again, please! LMAO!)

Oh Ray, I forgot to ask about the adapter plates. Are they for W2 headers? Did you make them yourself?
OH! And do you plan on taking water out from the center?

My do NOT attempt to have them welded for repair.... that is all.