461 speedmaster combo
I built a 461 with the speedmaster heads. I used the bare castings installed 2.19 SI intake and 1.77 SI exhaust valves ra4 length. I had the bowls cut on the Serdi with the valve job and did some blending in the bowls. I smoothed out the pushrod bulge and opened the port up to match the cnc opening. I have some pictures if anyone is interested. It has a Howards 237/243 hydraulic roller 1.65 rockers and a torker 2 port matched to the heads. It sounds really good. Have not had it to the track yet but hoping for 550-575 hp. I don't have any access to a flow bench close to me but based on my ported edelbrocks I see no reason with this porting and the larger valves these heads won't flow 315-320 on the intake.
|