CHS Stage 2 5.7L Flow Numbers
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TECH Enthusiast
Joined: Nov 2002
Posts: 593
Likes: 1
From: Chicago Heights, IL
CHS Stage 2 5.7L Flow Numbers I got my heads back from CHS today and am very pleased with my flow numbers. These heads are my original 98 5.7L 806 casting heads that Chris ported and sent back to me. The heads have REV 2.02/1.57 valves in them with REV1116 dual springs and titanium retainers. I am going with a 228/224 reverse split cam with the hopes that I will have good low/mid torque. My car will not be a track car, so screaming high RPM numbers aren't what I am looking for.
These heads were flowed on a Superflow SF-600 bench at 28cfm and a 4" bore.
Lift/Int/Exh
.050/33.3/26.1
.100/66.6/55.6
.150/105.2/---
.200/144.0/111.5
.250/177.5/---
.300/210.2/150.5
.350/234.8/---
.400/259.7/178.0
.450/269.0/---
.500/277.5/193.5
.550/284.8/200.4
.600/286.3/205.4
These heads were flowed on the exact same bench as a set of GTP stage 2 heads, and my flow numbers in the .500" range were almost identical (mine were barely higher), but my midlift numbers from .300"-.500" range were significantly higher. At 400" lift, there was more than a 15 cfm difference. I'm not trying to compare apples to oranges, but these were two heads flowed on the exact same bench using the same test conditions.
I think these heads are going to scream with my cam combo, and I will have absolutely no problem with low/mid end torque for daily drivability.
Since CHS isn't a site sponsor, I can't advertise how to get ahold of him, but if anyone is interested, PM or email me, and I'll be happy to put you in touch with him.
These heads were flowed on a Superflow SF-600 bench at 28cfm and a 4" bore.
Lift/Int/Exh
.050/33.3/26.1
.100/66.6/55.6
.150/105.2/---
.200/144.0/111.5
.250/177.5/---
.300/210.2/150.5
.350/234.8/---
.400/259.7/178.0
.450/269.0/---
.500/277.5/193.5
.550/284.8/200.4
.600/286.3/205.4
These heads were flowed on the exact same bench as a set of GTP stage 2 heads, and my flow numbers in the .500" range were almost identical (mine were barely higher), but my midlift numbers from .300"-.500" range were significantly higher. At 400" lift, there was more than a 15 cfm difference. I'm not trying to compare apples to oranges, but these were two heads flowed on the exact same bench using the same test conditions.
I think these heads are going to scream with my cam combo, and I will have absolutely no problem with low/mid end torque for daily drivability.
Since CHS isn't a site sponsor, I can't advertise how to get ahold of him, but if anyone is interested, PM or email me, and I'll be happy to put you in touch with him.
