A2A Supercharged Intake Options

Senna-F1

Here is the science behind the velocity stack.

http://www.profblairandassociates.co...mouth_Sept.pdf

I was going to model my own custom stack based on this article. Still may, but I already had the 6” to 4” stack sitting in my MR2 so I used that one instead.

This issue I see with doing anything larger than about 3” is the rectangular section just doesn’t allow for a large round shape. At this point my 3D part through that section is right at the equivalent of a 3.9” dia pipe.

Here is a graph showing how small increases in pipe diameter have a large effect on square area. So every little bit helps. Also the model I created.

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"Z"en

I like what you did and are doing. Please keep us posted. I did similar sims before but didn't take too much time to look at the underlying principle. What inspired me was the Vortech bellmouth, but just for fun frankly as I was already satisfied with the power I was having. Anyway, always glad to see more engineering inventions. Interesting. ^_^

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Senna-F1

I seem to be having fuel pressure issues. On a 10 psi run and taking video of fuel pressure gauge it didn’t rise more than 5 psi, if that. This is probably my duty cycle issue.

Here’s a 15.2 peak psi boost gauge photo.

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takemorepills

What software are you using for 3D modeling?

Senna-F1

Autodesk Fusion 360. It’s a pain in the butt!!


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takemorepills

Hey guys, maybe I am way outta line here! But, why the heck all of the effort to squeeze an intake through the radiator support?

The radiator support on our cars is just a plastic structure that has nearly zero value as a crash integrity structure, so why not just window the area that we need an intake tube to go through?

Please excuse me if I am asking a naive question. I am planning on getting the TG ACE kit, and all of this effort about a clean way to bring intake air into the SC has me researching a lot. I have looked at pictures of the 370Z and G37 front end and radiator supports and am just wondering why not hack it up? It's not going to rust away.....

Senna-F1

Turtle and I both did plenty of hacking. Did you see where he went through 7 cutting wheels or something like that? So, we’re hacking, we’re just not removing all of it like one guy did. As for my approach, I didn’t want to be limited to a tube shape because as you can see, you can’t fit a large tube in there, and that greatly affects the surface area of the intake.

takemorepills

Maybe I'm naive. I haven't personally fully disassembled the front end on my Q60....yet. But, looking at the pics of the core support, it almost seems that you could section-out the core support, completely, and have enough room for a round tube intake. And the consequences would be nil, I guess??
core support.jpg

takemorepills

I guess there are AC lines right there also?

Senna-F1

And metal, and a headlight, more metal, bumper attachment point , a supercharger inlet that doesn’t line up with anything, etc.

turtle64b

Yeah, I got as close as I felt comfortable getting. I essentially did my best to round out that rectangle-ish hole there to fit a 3.5" silicone tube through. It has enough pliability to let me bend it to the Supercharger inlet. The problem being that with the pliability, comes collapse-ability... I haven't had the time I've wanted to work on a fix yet. My current setup collapses right around 10psi.

The reason that this is dangerous is because when the tube un-collapses, fuel may not be able to compensate fast enough to prevent the car from leaning out. Hence why I haven't taken it out for much datalogging lately.

TBatt

Would you be interested in sharing your design file or at least an STL of the design? I have a spool of carbon fiber nylon that I would like to make the part with.

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Senna-F1

Hey man, you helped me out early on, so I can probably work with you on getting you something. I just don’t want to give away all the hard work to someone who might try to do something with it that I wouldn’t approve of. I’ve gotten mostly laughs and disbelief comments. Those comments got more likes than my posts of the design or data I posted. So I’m not really eager to share anything at this point. There a few guys who get it, and I’m fine helping them out and sharing things. I’ll email you!

Senna-F1

Bens version 2. Just noticed this new video.

https://youtu.be/6YVHLzsSg4A

turtle64b

That looks really interesting. Made out of fiberglass definitely gives it more rigidity than silicone haha