[1795]

All kidding aside, I have to call the engine builder Monday and find out which Dart Iron Eagle heads I have and check out to what degree they already have been ported. I checked all of my paperwork from initial build and there was no description of the size of the heads, flow numbers or part number. There are three options with these heads. (all flow numbers are intake) 180 cc that flows 262 cfm at .700 lift; 200 cc that flow 285 cfm at .700 lift; and 215 cc that flow 306 cfm at .700 lift.

My cam has a maximum lift of .606 on the intake valve, so that will cut those flow numbers down as they are based on .700 lift. At 50 degrees the intake is .256. Running the eight stack Webers and 11:1 compression ratio.

Any thoughts? My guess is that I have the 180 cc heads, as the current builder stated that the heads will be the limiting factor on power and the choice becomes port them, or at about a cost of $650 per head new, buy the next size up.

Jim