Canfield PN 23-550 215cc SB Chevy Head Flow Results @ 28 inches water
Test Date:		6-18-03		7-18-03	7-18-03
-----	quoted*	as-is tested**	quoted*	final**	final***	avg	-----	exh/int***	-----	avg exh/int
lift	intake	intake	exhaust	exhaust	exhaust	exhaust	-----	ratio	-----	ratio
0.100	62	64	43.1	53	-----	53	<-- no pipe	-----	no pipe -->	83%
0.200	141	142	112.3	104	-----	104	<-- no pipe	-----	no pipe -->	73%
0.300	207	211	152.0	162	179	171	<-- average	85%	average -->	81%
0.400	255	264	173.0	196	214	205	<-- average	81%	average -->	78%
0.500	271	292	184.0	199	218	209	<-- average	75%	average -->	71%
0.600	279	297	195.5	197	220	209	<-- average	74%	average -->	70%
0.700	283	297	213.3	197	222	210	<-- average	75%	average -->	71%
0.800	-----	298	-----	194	222	208	<-- average	74%	average -->	70%
*4.125" cyl fixture used, pipe on exhaust
**4.25" cyl fixture used, no pipe on exhaust port
*** 4.25" cyl fixture used, exhaust used a 2"x8" pipe for 0.300" lift & above
6-18-03  -  out-of-the-box flow test on SF-600 machine by Alan at Burtonsville Performance Machine
7-18-03  -  minor pocket porting on exhaust ports, sharp corner on exhaust face/margin removed. Tested on
	SF-600 machine by Alan at Burtonsville Performance Machine