Has anyone flowed stock blue and red motor heads before, if so what cfm did they flow? Thanks
Holden 6 head flow figuires
Started by
_rb3torana_
, Feb 24 2012 02:09 PM
8 replies to this topic
#2
greens nice
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Forum Fixture
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Posted 24 February 2012 - 05:44 PM
Is SFA the answer you were looking for?
blue is better than red in stock form, red yt flows a little more than a stock blue.
blue is better than red in stock form, red yt flows a little more than a stock blue.
#3
_rb3torana_
_rb3torana_
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Posted 24 February 2012 - 07:18 PM
lol SFA is what I guessed, would you say around 120cfm@28 on the intake?
#4
_oldjohnno_
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Posted 24 February 2012 - 08:32 PM
I'm away from home at the moment so don't have my notes handy. But yeah 120cfm would be about right. There's a common belief that the stock blue/black carb heads are roughly comparable to a YT 9 port but in reality they are much the same flow as a 202 red head. Best stock 12 port is the VK EFI.
#5
_rb3torana_
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Posted 28 February 2012 - 08:47 PM
What is the standard intake and exhaust valve sizes on a 202 12 port blue head?
#6
_imperial engines_
_imperial engines_
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Posted 04 January 2016 - 11:03 AM
I have some flow figures for a sdt (reconditioned ) red head and a YT33c56 alloy blue head.
Hope this helps. tested at 10" as indicated . To convert to 28 multiply 10" figure by 1.67
Red 186 Std Benchmark vs YT33c56alloy corrected yt.pdf 143.37K
112 downloads
#7
N/A-PWR
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CABIN ENGINE CONTROLS GALORE
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Posted 26 January 2016 - 02:42 PM
Hello Nick,
So would that be 136cfm@28 for the YT head at 5.22" lift?
Hope this helps. tested at 10" as indicated . To convert to 28 multiply 10" figure by 1.67
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#8
_Muzzy_
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Posted 26 January 2016 - 03:12 PM
What is the standard intake and exhaust valve sizes on a 202 12 port blue head?
Intake 1.603".
Exhaust 1.408"
#9
_imperial engines_
_imperial engines_
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Posted 30 January 2016 - 04:52 AM
rb3torana, on 24 Feb 2012 - 14:58, said:
Has anyone flowed stock blue and red motor heads before, if so what cfm did they flow? Thanks
I have some flow figures for Holden heads
Red 186 Std Benchmark vs YT33c56alloy corrected yt.pdf 143.37K
112 downloads
Attached Files
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Red 186 Std Benchmark 1.pdf 59.72K
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Edited by imperial engines, 30 January 2016 - 05:02 AM.
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