Honda intake manifold
Edelbrock Victor X Intake Manifolds - SummitRacing.com
Long runner B18 Edelbrock manifold, for 3000-7800rpm:
Edelbrock Performer X Intake Manifolds 4771 - SummitRacing.com
Reply
0
0
Hmm a design i'm thinking off is an extremely short runner that gets rid of the pulses completely, more so like a plenum bolted directly to the head? Something like this?
Reply
0
0
I have never, EVER, seen any information showing long runners = top end power.
In fact, everything I have ever seen about intake manifolds, supports the short = topend, and long = lowend general rule of thumb we have here.
Sorry BogusSVO
In fact, everything I have ever seen about intake manifolds, supports the short = topend, and long = lowend general rule of thumb we have here.
Sorry BogusSVO
Last edited by 18psi; Dec 20, 2012 at 06:58 PM.
Reply
1
1
Reply
0
0
Reply
0
0
Junior Member
Joined: Mar 2012
Posts: 111
Total Cats: 8
Correct me if Im wrong:
The pulses are reflections OFF THE INSIDE OF THE PLENUM, not the runners themselves. So you will have tiny little reflections, so you will get the benefit of those reflections no where in your rpm range. I dont know if pulses are a disadvantage at any point, I dont recall reading that anywhere.
Has anyone done any research into how the resonance frequencies of the intake manifold effect the flow? Its probably minor compared to things like volume, length, etc.
The pulses are reflections OFF THE INSIDE OF THE PLENUM, not the runners themselves. So you will have tiny little reflections, so you will get the benefit of those reflections no where in your rpm range. I dont know if pulses are a disadvantage at any point, I dont recall reading that anywhere.
Has anyone done any research into how the resonance frequencies of the intake manifold effect the flow? Its probably minor compared to things like volume, length, etc.
Reply
0
0
Lol the resonance frequencies is the most important part of designing a manifold. They greatly increase the amount of air entering the cylinders at the rpms where the high pressure wave is at the valve while the valve is open.
Reply
0
0
Things like volume, length, cross section dictate resonant frequencies.
__________________
Reply
0
0
Its been a while since we talked about this but whatever happened with begis manifolds? Werent they designing some stuff? I wanted to see how the top tb mount manifold will perform
Reply
0
0
Junior Member
Joined: Mar 2012
Posts: 111
Total Cats: 8
All the things you listed would affect resonance frequency, but so would the material its made from and a whole lot of other factors. Its probably not a big enough influence on power to justify the effort.
Reply
-1
-1
Does that set of dyno sheets reflect begi's NEW manifold that will probably never happen?
Last I heard that thing was supposed to be getting tested LAST SPRING. Nothing on there website even mentions it anymore. I'd love to get a manifold, especially one that is proven (see post 546). If I can find one I'll do a back to back stock 99 intake vs new and add more data.
Last I heard that thing was supposed to be getting tested LAST SPRING. Nothing on there website even mentions it anymore. I'd love to get a manifold, especially one that is proven (see post 546). If I can find one I'll do a back to back stock 99 intake vs new and add more data.
Reply
0
0
Elite Member
Joined: Feb 2007
Posts: 1,608
Total Cats: 817
From: Columbus, OH
Just for data's sake..
This was the baseline before touching up the tune and revving higher. Sounds like most guys will stay at or near factory limit.
Refreshed N/A 94 block, stock 99 head. Solid line is 99 mani without vics wired, dotted is Blox skunk2 copy manifold.
This was the baseline before touching up the tune and revving higher. Sounds like most guys will stay at or near factory limit.
Refreshed N/A 94 block, stock 99 head. Solid line is 99 mani without vics wired, dotted is Blox skunk2 copy manifold.
Reply
0
0
Reply
0
0
