[DeTomaso] High Ported Iron Closed Chamber 4V head flow results
Daniel C Jones
daniel.c.jones2 at gmail.com
Sun Feb 9 17:23:49 EST 2014
A while back, Dave McLain flowed a set of old iron closed chamber 4V
heads with the 1970's Pro Stock style high port exhaust plate and
shear vanes screwed into the intake port floors. I thought I'd share
the results. Flowed on a Super Flow bench. Tested at 10" and
converted to 28". 2.19" intake valve and 1.71" exhaust. Completely
stock combustion chambers.
Lift Intake Exhaust
Inch CFM CFM
0.025 15.9 10.2
0.050 33.2 28.5
0.100 65.6 60.0
0.150 100.6 89.0
0.200 137.8 109.8
0.250 167.6 124.1
0.300 195.8 141.4
0.350 224.0 155.4
0.400 245.6 166.8
0.450 261.4 176.7
0.500 278.8 185.3
0.550 289.7 194.7
0.600 300.9 204.2
0.650 312.1 215.2
0.700 322.0 225.8
0.750 325.7 234.4
0.800 307.8 239.7
Not too bad for 1970's small block cylinder heads.
Dan Jones
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