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Honda100 · 01-09-2013, 10:44 PM

Hi there,

Now I know that I am not educated in terms of optimal flow rates, but am just toying around with an idea since my Toyota bit the dust.

EDIT: I also forgot to add that I wanted to replace the carb with something smaller. I have 6 or 7 carb laying around from anything for a Honda Super Cub 90 to a Honda Rebel 250. Maybe I could make an intake that could accept one of these carbs?

I have an SR5 Corolla with a ton of miles that isn't worth the $300 for a new carburetor, so I thought it would be a fun idea to "engineer" it for fuel economy. Please correct me where needed, I know that I am just an amateur when it comes to engine design and operating principles.

So any intake that is oriented towards performance is usually a bigger diameter right? So in principle, a smaller diameter intake would restrict the total mixture allowed in right?

So does that mean I can just fabricate myself a smaller intake manifold port and attach a smaller carburetor on it for better mpg?

I know this probably isn't right as I suspect from reading around that air speed/charge speed has something to do with why, but that's why I am here! TO learn. Thanks!

01-09-2013, 10:44 PM	#1 (permalink)
Honda100 EcoModding Lurker Join Date: Oct 2012 Location: SE Asia Posts: 74 MetroScoopy - '09 CHF50 Honda Metropolitan 50cc 90 day: 97.98 mpg (US) Training Shoe - '99 Hyundai Hyundai Atoz Prime 797cc 90 day: 31.28 mpg (US) Thanks: 1 Thanked 4 Times in 4 Posts	How to "make" a custom intake for mpg? Hi there, Now I know that I am not educated in terms of optimal flow rates, but am just toying around with an idea since my Toyota bit the dust. EDIT: I also forgot to add that I wanted to replace the carb with something smaller. I have 6 or 7 carb laying around from anything for a Honda Super Cub 90 to a Honda Rebel 250. Maybe I could make an intake that could accept one of these carbs? I have an SR5 Corolla with a ton of miles that isn't worth the $300 for a new carburetor, so I thought it would be a fun idea to "engineer" it for fuel economy. Please correct me where needed, I know that I am just an amateur when it comes to engine design and operating principles. So any intake that is oriented towards performance is usually a bigger diameter right? So in principle, a smaller diameter intake would restrict the total mixture allowed in right? So does that mean I can just fabricate myself a smaller intake manifold port and attach a smaller carburetor on it for better mpg? I know this probably isn't right as I suspect from reading around that air speed/charge speed has something to do with why, but that's why I am here! TO learn. Thanks! __________________ 1988 Honda Super Cub 50cc Last edited by Honda100; 01-09-2013 at 10:54 PM..