I did some research on this topic before but most of the post go back to 2002 and 2004, with the release of the inline pro manifold, another 5 years since the old post, and new s2000 owners with new ideas I wanted to see what people are doing to gain power from the intake manifold. From the threads that ask what everybody does for a living I noticed many s2000 owners are engineers which seems to be a reason there are so many owners that are do it yourselfers. Here is some back ground on me. I am a 23 year old college student working on a degree in Computer Engineering and another degree in Computer Science (this is my 6th year and I will have over 190 credits when I graduate) then I am off to law school where I will become a patent attorney with a concentration on software patenting. I am basically saying that I do have a strong background in math and physics but not in fluid dynamics. Since I am still here in school I have daily access to incredible simulation software and many professors. The professors I have talked to were surprisingly receptive to me when I asked them if they would help me make the intake manifold on my car more efficient. I guess I could say I have experts in all aspects of their field that are willing to help, everyone from a physics professor to a mechanical engineering professor and accesses to equipment to fabricate. This is what I was thinking.

1) make the runners longer
2) give the runners a larger diameter
3) create a velocity stack in each runner

I made these pictures in paint to help show what I am trying to explain. This first picture represents the intake manifold as it comes from the factory with the blue representing air flow:



This second picture represents a modified intake manifold. The red represents the changes that would be made:



This third picture shows the final product and its flow:



Has anybody tried anything like that? Is this something I should try, or am I missing some key concepts from fluid dynamics?

 

With the heavy-duty talent you have available, you're asking a bunch of strangers with unknown qualifications?

 

is that the kind of software they have in college??


but best of luck with this project, let us know how it works out

 

endyn is developing an intake manifold for the s2000. also mentions the some flaws with the stock s2000 manifold. near the bottom of the page.

http://www.theoldone.com/components/cylind...S2000/s2000.htm

 

There are many smart and qualified people on this site and I just wanted to see if anything like this has been tried before.


I just used paint because it is quick and easy :-)

Thanks for the info

 

Hey, not to rain on your parade...but i think the s2k engine has hundreds of R&D hours on it. I dont think a simple computer has the brute force needed to compute the CFD Honda put into it. I do believe that Honda might have cut corners in the mnfg to make it "cheaper to produce" but I doubt the normal person/engineer will be able to make it better.

Also, how would you make a funnel shape?

 

[QUOTE=ikeyballz,Dec 13 2009, 05:30 AM]Hey, not to rain on your parade...but i think the s2k engine has hundreds of R&D hours on it.

 

The CNC machinery to bore your shape out isn't complicated in itself, it is the access to those internal passages of a cast piece, from the wrong (narrow) side that would make what you are proposing nearly impossible.

The theory is fine, the execution is what would be tough.

To be fair, the answers of how many hours of R&D Honda puts into it vs. an individual improvement all can be met by the standards that Honda must meet (emmissions, reliability, mass mfg tolerance) vs. what an individual is willing to put up with in those areas.

However at the end of the day, I think the best improvement like this you're likely to make on a stock manifold is to extrusion-hone the internal ports to make the surfaces as smooth as possible. Though even that is up for debate as CFD might show that 'tumbling air' is better for combustion than laminar flow.

Nice ideas worthy of trying, but I'm doubtful of the execution w/o completely fabbing up a new, multi-piece non-cast manifold.

 

It can be done with sheet metal and some skilled welding. You'll never be able to CNC it as a one piece unit from a billet, not in a way that would be anywhere near reasonable. With the dimensions worked out there are many fabricators that could make this out of sheet metal though.

Oh and if you want to get technical, you'r drawings are flawed... You'd need some sort of inlet/mount for the throttle body.

Mike

 

Well it appeared as though the OP was referring to modifying a stock intake manifold.

Were this project to be fabbed up completely from scratch either as a one-off or limited production, I'd presume one would still do it from billet aluminum or perhaps magnesium but in a multi-piece fashion.

I wouldn't imagine doing it via sheetmetal & welding. It would seem to me the heat and more importantly the vibration involved would make that a less suitable fabrication methodology, not to mention the cost involved in the skilled welding required.