What do the runners do?
Pro
Joined: Jan 2004
Posts: 503
Likes: 0
From: Forney Texas
Your runners are located between the plenum and the intake manifold. Their purpose is to direct the air flow coming in from the plenum to the intake manifold and from there into the head to support combustion. Since you have a fuel injection fuel delivery system you do not have a carb sitting atop the intake manifold so the air takes a somewhat longer trip to the combustion chamber. Hope this helps.
Take care.
90Indy
Take care.
90Indy
Team Owner
Joined: Sep 2001
Posts: 62,171
Likes: 1,735
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
The runners are the tubes leading from the plenum to the intake manifold. They are there to let the engine breathe.
Their length is what amplifies your low-end torque.
Original Founding Member!
Joined: Jul 1999
Posts: 9,037
Likes: 88
From: Granby, MA
Cruise-In 1, 3, 9. 10 & 11 Veteran
yep exactly what they said
Vader hit that on the head....
The length is what matters....this is why different designs equal more or less torque in a certain band.
Longer the runners...up to a point....more torque in the low rpm band....why L-98's are notorious for having low end grunt....but nothing after 4500. The runner length is like a tuning fork for our cars.
MiniRam and SuperRam use smaller runner lengths....so they give up a little in the lower end but allow the engine to pull harder in the higher RPM range.....
its really pretty cool stuff
The length is what matters....this is why different designs equal more or less torque in a certain band.
Longer the runners...up to a point....more torque in the low rpm band....why L-98's are notorious for having low end grunt....but nothing after 4500. The runner length is like a tuning fork for our cars.
MiniRam and SuperRam use smaller runner lengths....so they give up a little in the lower end but allow the engine to pull harder in the higher RPM range.....
its really pretty cool stuff
