NEW WR INTAKE MANIFOLD.. FINAL VERSION..
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From: California
JUST FYI.. This was taken from ENGINEBUILDERMAG.COM
Runner Length:
Runner length also affects the rpm range where an engine makes the most power. Longer runner lengths have a “ram” effect that helps keep the air moving forward as the intake valves open and shut. When an intake valve opens, there is a short lag before the cylinder starts to pull air through the runner into the combustion chamber. A longer runner helps maintain the inertia of the air column so it will fill the cylinder faster.
When the intake valve slams shuts, the momentum of the incoming air hits a roadblock, and a pressure wave rushes backwards through the intake port and runner. A longer intake runner tends to keep the air moving in the right direction in spite of the reversionary pressure pulse that is trying to push it backwards.
Shorter runners, on the other hand, usually flow better at higher engine rpm. Reducing the length of the runners may allow the engine to make more power at the top end, but the trade-off may be a loss of power and torque at lower speeds. When choosing an intake manifold, therefore, the runner length should match the engine rpm range where the engine is built to make the most power. If you are building a low rpm torque motor, you want an intake manifold with longer high velocity runners. On the other hand, if you are building a high revving motor, you will probably want a manifold with shorter runners or runners with a larger cross-sectional area to flow more air.
Link to this article..
http://www.enginebuildermag.com/Arti...d_to_wild.aspx
Runner Length:
Runner length also affects the rpm range where an engine makes the most power. Longer runner lengths have a “ram” effect that helps keep the air moving forward as the intake valves open and shut. When an intake valve opens, there is a short lag before the cylinder starts to pull air through the runner into the combustion chamber. A longer runner helps maintain the inertia of the air column so it will fill the cylinder faster.
When the intake valve slams shuts, the momentum of the incoming air hits a roadblock, and a pressure wave rushes backwards through the intake port and runner. A longer intake runner tends to keep the air moving in the right direction in spite of the reversionary pressure pulse that is trying to push it backwards.
Shorter runners, on the other hand, usually flow better at higher engine rpm. Reducing the length of the runners may allow the engine to make more power at the top end, but the trade-off may be a loss of power and torque at lower speeds. When choosing an intake manifold, therefore, the runner length should match the engine rpm range where the engine is built to make the most power. If you are building a low rpm torque motor, you want an intake manifold with longer high velocity runners. On the other hand, if you are building a high revving motor, you will probably want a manifold with shorter runners or runners with a larger cross-sectional area to flow more air.
Link to this article..
http://www.enginebuildermag.com/Arti...d_to_wild.aspx
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Music City Scions
Scikotics
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Joined: Jun 2005
Posts: 16,747
From: TN
Originally Posted by aen
travis, you need to let things slide lol.
this looks nice, i thought shorter runners = more torque though.
this looks nice, i thought shorter runners = more torque though.
What?
Just making sure the proper/accurate information is getting out there.
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Originally Posted by aen
travis, you need to let things slide lol.
this looks nice, i thought shorter runners = more torque though.
this looks nice, i thought shorter runners = more torque though.
Longer runners = more torque.
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Joined: Feb 2008
Posts: 133
From: California
Originally Posted by toyota_scion_tc
Originally Posted by aen
travis, you need to let things slide lol.
this looks nice, i thought shorter runners = more torque though.
this looks nice, i thought shorter runners = more torque though.
Longer runners = more torque.
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Joined: Dec 2004
Posts: 1,458
From: Everywhere
Originally Posted by WRLEO
Originally Posted by toyota_scion_tc
Originally Posted by aen
travis, you need to let things slide lol.
this looks nice, i thought shorter runners = more torque though.
this looks nice, i thought shorter runners = more torque though.
Longer runners = more torque.
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