paging total engine airflow
01-13-2003, 03:38 AM
#1
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paging total engine airflow what do you mean when you say flowed with a pipe. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> <img border="0" alt="[bang head]" title="" src="graemlins/gr_banghead.gif" />
01-13-2003, 10:11 AM
#4
Re: paging total engine airflow I'm quoting Brian Tooley of TEA:
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!
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!
