With additional development work over the course of the last several months we are ready to announce with pride new max effort flow rates for the iron passener car heads.
These numbers apply to both the early castings and also the D3's !!!
These are flow rates for the Standard intake port entry. They are not CJ or Victor matched.
intake flow rates std entry:
.500" 302 to 307
.600" 329 to 332
.700" 340 to 343
.800" 350 to 355
Exhaust flow rates: D3 / D0VE
.400" 187 / 172
.500" 200 / 195
.600" 196 / 200
.700" 195 / 196
Due to different port shapes and porting styles needed for the unique needs of the D3 vs D0 heads the exhaust rates are different...
These numbers for exhaust are with out pipe. In order to verify results the casting(s) have been triple checked having been flowed on my bench, dave mclains sf 110 and brett powells sf600...
Brett powells bench gave the best intake numbers with somewhat more conservative exhaust rates which he stated that his bench is exhaust conservative.
My bench is stingy on intake flow rates till 600" lift due to the ultra high depressions i flow at low lifts...
For class racers who must use iron heads or the street guy who wants to smack chevy boys with lincoln heads here is the best we have to offer...
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