Head Flow Results.. I'm interested in some comparative data
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Melting Slicks
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From: Milwaukee WI
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Head Flow Results.. I'm interested in some comparative data
Have you had your heads flow tested?? If so, what were your results ???
intake and exhaust flows, at .600 lift... ?
intake and exhaust valve sizes ?
combustion chamber bore size ?
whose heads are they ?
and to make sure we are testing consistently :
what was the diameter of testing cylinder ?
# of inches of Hg used for the flow test ?
I plan to put together a chart so we can do some comparisons...
[Modified by nevrenuf, 10:39 AM 1/9/2003]
intake and exhaust flows, at .600 lift... ?
intake and exhaust valve sizes ?
combustion chamber bore size ?
whose heads are they ?
and to make sure we are testing consistently :
what was the diameter of testing cylinder ?
# of inches of Hg used for the flow test ?
I plan to put together a chart so we can do some comparisons...
[Modified by nevrenuf, 10:39 AM 1/9/2003]
Safety Car
Joined: Jan 2000
Posts: 4,965
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From: Midlothian, VA
Re: Head Flow Results.. I'm interested in some comparative data (nevrenuf)
Have you had your heads flow tested?? If so, what were your results ???
intake and exhaust flows, at .600 lift... ?
intake and exhaust valve sizes ?
combustion chamber bore size ?
whose heads are they ?
and to make sure we are testing consistently :
what was the diameter of testing cylinder ?
# of inches of Hg used for the flow test ?
I plan to put together a chart so we can do some comparisons...
[Modified by nevrenuf, 10:39 AM 1/9/2003]
intake and exhaust flows, at .600 lift... ?
intake and exhaust valve sizes ?
combustion chamber bore size ?
whose heads are they ?
and to make sure we are testing consistently :
what was the diameter of testing cylinder ?
# of inches of Hg used for the flow test ?
I plan to put together a chart so we can do some comparisons...
[Modified by nevrenuf, 10:39 AM 1/9/2003]
Ferrea (F6231) 2.02 intake and (F6232) 1.55 exhaust valves
Stock Bore Size
Chamber size is 63cc, 10:8:1 CR
TEA flows (28 inch of water, 3.9 inch bore) exhaust with a 1 3/4 diameter pipe which should give a more realistic result. Per GM heads should be flowed with intake in place and a pipe on exhaust. Having a pipe in place on exhaust increases the flow. Depending on the head, a pipe can have little effect or increase the flow numbers by up to 20 to 40 cfm.
FLOW:
Can't wait to see the sheet!
[Modified by C5Noir, 11:16 AM 1/9/2003]
[Modified by C5Noir, 11:54 AM 1/9/2003]
Safety Car
Joined: Oct 2001
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From: Insert Wittty Comment here
Re: Head Flow Results.. I'm interested in some comparative data (C5Noir)
I have quite a bit of flow data. I have a bunch of new data that folks have recently sent me that I still need to add.
c5noir - Where did you get the information that GM recommends flowing heads with an intake and with a pipe?
The only thing close to that that I have seen is that they were required by the SCCA to do so on the CNC head program. There are folks who do flow tests with and without a pipe. Most do not use an intake. I was just wondering about the GM recommendation...
c5noir - Where did you get the information that GM recommends flowing heads with an intake and with a pipe?
The only thing close to that that I have seen is that they were required by the SCCA to do so on the CNC head program. There are folks who do flow tests with and without a pipe. Most do not use an intake. I was just wondering about the GM recommendation...
Safety Car
Joined: Jan 2000
Posts: 4,965
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From: Midlothian, VA
Re: Head Flow Results.. I'm interested in some comparative data (J-Rod)
J-rod, I got the information from 99 Black Bird T/A from LS1Tech. He said Brian Tooley (TEA owner and porter) told him this (99% sure that's where he got that info)
EDIT:
Here's the info, I found it, J-Rod from Brian Tooley:
TEA flows their exhaust with a pipe, we don't hide that fact, we publicize it. Ken Sperry (Airflow Engineer at GM) told me in 1994 to never develop exh ports or flow exh ports without a pipe, he was working on the LS1 head at that time. I was intelligent enough to listen. We have flowed LS1 exh ports from about everyone in the business and on our bench with a pipe ours flow as much as anyones out there and is SMALLER. This is our belief, if we can get 70%-80% intake to exhaust flow ratio with a small exhaust then it is easier to tune and easier to develop power with. Dick Maskin owner of Dart cyl heads and the man behind many NHRA Prostock champions told me to develop exhaust ports that are of a consistent cross section. This means they have to be bigger in the bowl (to make up for the valve stem) then at the exit to have a consistent cross section. I was intelligent enough to listen to him as well. If you look at almost everyones LS1 exhaust ports they look like a megaphone, getting bigger as they get to the flange. Which is clearly backwards according to Dick Maskin. I have seen these ports work, but once again I believe they are harder to tune. I can't believe people look at our exhaust ports and see how small the exit is and then think this is a bad thing!
:thumbs:
[Modified by C5Noir, 11:51 AM 1/9/2003]
EDIT:
Here's the info, I found it, J-Rod from Brian Tooley:
TEA flows their exhaust with a pipe, we don't hide that fact, we publicize it. Ken Sperry (Airflow Engineer at GM) told me in 1994 to never develop exh ports or flow exh ports without a pipe, he was working on the LS1 head at that time. I was intelligent enough to listen. We have flowed LS1 exh ports from about everyone in the business and on our bench with a pipe ours flow as much as anyones out there and is SMALLER. This is our belief, if we can get 70%-80% intake to exhaust flow ratio with a small exhaust then it is easier to tune and easier to develop power with. Dick Maskin owner of Dart cyl heads and the man behind many NHRA Prostock champions told me to develop exhaust ports that are of a consistent cross section. This means they have to be bigger in the bowl (to make up for the valve stem) then at the exit to have a consistent cross section. I was intelligent enough to listen to him as well. If you look at almost everyones LS1 exhaust ports they look like a megaphone, getting bigger as they get to the flange. Which is clearly backwards according to Dick Maskin. I have seen these ports work, but once again I believe they are harder to tune. I can't believe people look at our exhaust ports and see how small the exit is and then think this is a bad thing!
:thumbs:
[Modified by C5Noir, 11:51 AM 1/9/2003]
Drifting
Joined: May 1999
Posts: 1,580
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From: Shelbyville KY
Re: Head Flow Results.. I'm interested in some comparative data (C5Noir)
C5Noir and I have the same heads, so I won't repeat anything. TEA makes some awesome heads. Here are my TEA SII 5.3L flow #'s:
Lift Intake Exhaust
0.100" 68.8 50.8
0.200" 139.2 111.7
0.300" 206.5 161.8
0.400" 250.4 208.2
0.500" 284.0 240.6
0.550" 295.5 250.2
0.600" 304.3 254.8
Lift Intake Exhaust
0.100" 68.8 50.8
0.200" 139.2 111.7
0.300" 206.5 161.8
0.400" 250.4 208.2
0.500" 284.0 240.6
0.550" 295.5 250.2
0.600" 304.3 254.8
Safety Car
Joined: Oct 2001
Posts: 3,504
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From: Insert Wittty Comment here
Re: Head Flow Results.. I'm interested in some comparative data (C5Noir)
Thanks for the info. That is good information. Maskin knows how to make wicked power...
If anyone is interested in head flow numbers here are my latest spreadsheets. I still have info to add, but I guess this is a place to start...
Rather than post a screen shot of each iteration, I have posted it to my webspace. http://users3.ev1.net/~black_ops/hea...s-01-03-03.htm
This spreadsheet has several section
Sheet 1 is all heads.
Sheet 2 is all LS6 heads.
Sheet 3 is all heads (raw numbers) without CFM comparison.
Sheet 4 is all LS6 (raw numbers) without CFM comparison.
Sheet5 is GMHTP test of head flow with and without Intake manifold in place.
If anyone else has any further numbers let me know, and I will update the spreadsheet.
If anyone is interested in head flow numbers here are my latest spreadsheets. I still have info to add, but I guess this is a place to start...
Rather than post a screen shot of each iteration, I have posted it to my webspace. http://users3.ev1.net/~black_ops/hea...s-01-03-03.htm
This spreadsheet has several section
Sheet 1 is all heads.
Sheet 2 is all LS6 heads.
Sheet 3 is all heads (raw numbers) without CFM comparison.
Sheet 4 is all LS6 (raw numbers) without CFM comparison.
Sheet5 is GMHTP test of head flow with and without Intake manifold in place.
If anyone else has any further numbers let me know, and I will update the spreadsheet.
