.050"-30.0
.100"-58.0
.150"-86.7
.200"-110.7
.250"-130.3
.300"-143.3
.350"-153.1
.400"-158.9
.450"-164.1
.500"-166.8
.550"-166.8
.600"-170.2


Found this over at turboford.net. There are lots of great threads reguarding the DP head flow. The turbo D port head flows better...but 99% of them are cracked (including mine but it still runs fine). Porting should open the intake flow up to about 210 CFM and a good valvejob should get you 10-15 more CFM. The D port turbo head is good for ~250 CFM on the intake side with a max effort port and valve job. Not bad for a little 2.3 head....

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record breaking '75 Maverick bracket car 2 time track champion, '84 Mustang LX bracket car, '78 Fairmont Futura, '86 Merkur XR4Ti, '95 F250 PSD, 00 F150, '03 SVT Lightning (DSG) #888