Posted By: BradH
Standard BB Victor / Procomp Porting - 11/21/15 04:41 PM
I figured this might be of interest to some. I recently sent my Procomp “Victor clone” to Dwayne at Porter Racing Heads to test on his Saenz 600 bench, plus it would give him an opportunity to carve on a port and see what he came up with.
This is the Procomp I've posted about in the past as my “crash test dummy”, since I bought it for the sole purpose of being an R&D head to come up w/ a port to do another set of Victors I have. I'd already done two different intake ports w/ the intent of keeping to a smaller runner volume than my Hughes CNC'd Victors.
The first port wasn't horrible, but I had started taking the short turn in the wrong direction and stopped messing with it from that point. FWIW, I'd left the width basically standard at ~ 1.30”, but did raise it to ~ 2.35”.
.100---71.9
.200--152.9
.300--218.3
.400--275.8
.450--299.8
.500--317.8
.550--328.5
.600--338.0
.650--345.7
.700--356.0
.750--355.2
I took a different approach with a second port trying to keep the high-lift #s from backing up, but it never had the lower-lift flow of the first. Also, in this case I left the height standard, but widened the port to ~1.35”. FYI, this runner measured 296 cc, which equates to about a 255 cc standard-height port when taking into account the built-in intake runner spacer.
.100---71.4
.200--150.0
.300--209.0
.400--265.4
.450--294.9
.500--317.8
.550--336.1
.600--338.8
.650--348.4
.700--355.2
.750--359.0
Dwayne took one of the remaining untouched ports – other than having had an IMM valve job – and carved something that turned out pretty solid, especially given he left a completely as-machined stock-sized port entry with this one. This runner measured 291 cc, so it's slightly smaller than mine and would be comparable to around a 250 cc standard-height port.
------Stock / Ported
.100---71.9 / 73.7
.200--147.6 / 154.9
.300--204.2 / 222.0
.400--257.8 / 277.7
.450--277.7 / 303.7
.500--292.2 / 321.6
.550--298.7 / 332.3
.600--307.5 / 340.7
.650--313.2 / 345.7
.700--313.2 / 349.5
.750--314.0 / 350.3
Regardless, just some more tech stuff as the cold weather sets in.
This is the Procomp I've posted about in the past as my “crash test dummy”, since I bought it for the sole purpose of being an R&D head to come up w/ a port to do another set of Victors I have. I'd already done two different intake ports w/ the intent of keeping to a smaller runner volume than my Hughes CNC'd Victors.
The first port wasn't horrible, but I had started taking the short turn in the wrong direction and stopped messing with it from that point. FWIW, I'd left the width basically standard at ~ 1.30”, but did raise it to ~ 2.35”.
.100---71.9
.200--152.9
.300--218.3
.400--275.8
.450--299.8
.500--317.8
.550--328.5
.600--338.0
.650--345.7
.700--356.0
.750--355.2
I took a different approach with a second port trying to keep the high-lift #s from backing up, but it never had the lower-lift flow of the first. Also, in this case I left the height standard, but widened the port to ~1.35”. FYI, this runner measured 296 cc, which equates to about a 255 cc standard-height port when taking into account the built-in intake runner spacer.
.100---71.4
.200--150.0
.300--209.0
.400--265.4
.450--294.9
.500--317.8
.550--336.1
.600--338.8
.650--348.4
.700--355.2
.750--359.0
Dwayne took one of the remaining untouched ports – other than having had an IMM valve job – and carved something that turned out pretty solid, especially given he left a completely as-machined stock-sized port entry with this one. This runner measured 291 cc, so it's slightly smaller than mine and would be comparable to around a 250 cc standard-height port.
------Stock / Ported
.100---71.9 / 73.7
.200--147.6 / 154.9
.300--204.2 / 222.0
.400--257.8 / 277.7
.450--277.7 / 303.7
.500--292.2 / 321.6
.550--298.7 / 332.3
.600--307.5 / 340.7
.650--313.2 / 345.7
.700--313.2 / 349.5
.750--314.0 / 350.3
Regardless, just some more tech stuff as the cold weather sets in.
