Last time we talked about cams and headwork and intermittenly touched on the intake manifold and its drawbacks.
(If you are hear to say, stupid/don't waste the effort/you're an idiot/"You should just do a 24v swap," stop now, and don't post.)
I'm buying matt325is intake manifold flange as a starting point for a custom intake manifold.
Previous discussions have indicated the long runner length of the stock manifold as a one of the obstacles to high RPM flow. Basically my idea for the intake manifold is a Dbilas style setup, minus the individual throttle bodies of course.
My two main concerns are:
1. Size of the airbox
2. Shape of the airbox
1. I want to make sure the airbox is large enough and will replenish fast enough for each intake stroke of the crank. I don't know how many of you are familiar with sportbike stuff and so called "Big Bang" bikes, but for instance the new R1 uses a wildly timed crankshaft to improve smooth running etc, lots of discussion about piston speeds and throttle response and shit, but the main reason they don't just have a piston firing every 90° of crank rotation is that the airbox would not be able to refill fast enough for each intake stroke.
2. A simple rectangle with the throttle body on the side, ie exactly like the Dbilas setup or a "house" shape with the side of the rectangle slanting outwards to long side, or even more a 666fabrication style intake (which also matches the E46 M CF airbox I think).
What say you?
(If you are hear to say, stupid/don't waste the effort/you're an idiot/"You should just do a 24v swap," stop now, and don't post.)
I'm buying matt325is intake manifold flange as a starting point for a custom intake manifold.
Previous discussions have indicated the long runner length of the stock manifold as a one of the obstacles to high RPM flow. Basically my idea for the intake manifold is a Dbilas style setup, minus the individual throttle bodies of course.
My two main concerns are:
1. Size of the airbox
2. Shape of the airbox
1. I want to make sure the airbox is large enough and will replenish fast enough for each intake stroke of the crank. I don't know how many of you are familiar with sportbike stuff and so called "Big Bang" bikes, but for instance the new R1 uses a wildly timed crankshaft to improve smooth running etc, lots of discussion about piston speeds and throttle response and shit, but the main reason they don't just have a piston firing every 90° of crank rotation is that the airbox would not be able to refill fast enough for each intake stroke.
2. A simple rectangle with the throttle body on the side, ie exactly like the Dbilas setup or a "house" shape with the side of the rectangle slanting outwards to long side, or even more a 666fabrication style intake (which also matches the E46 M CF airbox I think).
What say you?
Comment