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Flow Numbers for stock heads???

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Old Oct 16, 2011, 03:20 PM
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Flow Numbers for stock heads???
Does anyone know where I can find flow bench numbers for stock Evo heads?
ie evo 8, 9, & 10....
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Old Nov 6, 2011, 11:33 AM
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http://www.autoservicetech.com/vecalculator1.html

This should help. Log a few pulls, plug in your numbers in and you should have a very close answer.
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Old Nov 13, 2011, 10:41 AM
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Intake
Lift, cfm@28"
.000, 0
.039, 31.0
.079, 62.3
.118, 92.7
.157, 121.9
.197, 149.2
.236, 174.5
.276, 194.3
.315, 204.8
.354, 209.2
.394, 211.6
.433, 213.9
.472, 214.6

Exhaust
Lift, cfm@28"
.000, 0
.039, 25.7
.079, 55.2
.118, 83.5
.157, 112.0
.197, 138.5
.236, 163.8
.276, 180.6
.315, 192.3
.354, 201.9
.394, 207.5
.433, 210.1
.472, 212.4
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Old Nov 14, 2011, 10:27 AM
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Tim are those Cosworth's numbers?
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Old Nov 14, 2011, 10:42 AM
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https://www.evolutionm.net/forums/ev...w-numbers.html
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Old Nov 14, 2011, 10:56 AM
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Originally Posted by JohnBradley
Tim are those Cosworth's numbers?
Stock evo 8.
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Old Nov 14, 2011, 11:29 AM
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Stock:
Intake
.100 73
.200 146
.300 202
.400 219
.500 224

Exhaust
.100 74
.200 154
.300 197
.400 211
.500 222

My CNC ported head (Carz):
Intake
.100 87
.200 161
.300 222
.400 260
.500 279

Exhaust
.100 86
.200 170
.300 228
.400 252
.500 259
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Old Nov 14, 2011, 12:16 PM
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Originally Posted by tim radley
Stock evo 8.
Sorry I meant are those the numbers that Cosworth had posted in years past. It appears they are the AMS numbers which I tend to trust being more comparable to what I know. I mean I cant trust Cosworth's cam engineering why would I believe their flow numbers?
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Old Nov 14, 2011, 12:20 PM
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Originally Posted by JohnBradley
Sorry I meant are those the numbers that Cosworth had posted in years past. It appears they are the AMS numbers which I tend to trust being more comparable to what I know. I mean I cant trust Cosworth's cam engineering why would I believe their flow numbers?
yeah, cosworth does some weird things with the flowbench. they flow them at like 10" then convert to 28". why not just flow them at 28"?
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Old Nov 14, 2011, 01:04 PM
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Originally Posted by JohnBradley
Sorry I meant are those the numbers that Cosworth had posted in years past. It appears they are the AMS numbers which I tend to trust being more comparable to what I know. I mean I cant trust Cosworth's cam engineering why would I believe their flow numbers?
No these are what i measured on my flowbench. I get figures very close to a couple of friends with their own benches too of different brands so feel my numbers are reliable as none of use are prone to exageration.
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Old Nov 14, 2011, 01:58 PM
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Head flow figures on other heads on the same flow bench (MadCap \ Carz ).
Attached Thumbnails Flow Numbers for stock heads???-headflow2.jpg  
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Old Nov 18, 2011, 05:11 AM
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Looks like i'm gonna have to port my own head....
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