About a year ago I purchased a set of Assault Racing 205cc heads from Amazon. Put them together with Competition products and Comp Cams parts. 2.02/1.60 valves and double springs. 7/16" studs, guide plates and 1.7 rockers. I got bored and had to do some work on the short block. So I had Lloyd Elliot owner of Elliot Portworks who is a well known and respected cylinder head guru, port my Assault heads. I need to drive down and pick them up before I can get some pictures but he has already sent me the flow numbers. I spent some money for flow bench time before and after to document these heads. He also reworked the chamber and milled them 0.020" as well as revised the valve job and setup the springs which are now 150# on the seat and 375# open.
BEFORE PORTING
LIFT------INTAKE-----EXHAUST
.200----------135-------103
.300----------183-------131
.400----------225-------150
.500----------244-------164
.600----------241-------175
.700----------241-------177
AFTER PORTING
LIFT------INTAKE-----EXHAUST
.200----------138-------107
.300----------192-------138
.400----------241-------164
.500----------274-------183
.600----------291-------193
.700----------295-------199
Lloyd also did a set of 5.3l 862s for me, cut them for 2.00 intake valves, ported them and installed double springs setup at 155# seat and 400# open. Cleaned up the chamber and milled them 0.020" along with performing a nice valve job. They are going on the LQ4 6.0L G-van along with a different cam.
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