Carburetor inlet shape

[motorsportsdesign]

I am designing a 4 barrel carburetor (similar to a Holley Dominator) and would appriciate some help from someone that knows about the design of air inlet shapes.

The engine vacuum at full speed open throttle = .5 hg water

The fixed parameters of the inlet horn are:
Length = 1.25 inches
Small diameter = 1.90 inches
Large diameter = 2.75 inches (larger if they overlap)

The values I need guidance on are:

Angle at opening: ?
Shape: constant radius (r), conic (rho?), ellipse (angle)?

Jonathan T. Schmidt

http://www.schmidtmotorworks.com

 

[carnage1]

http://naca.larc.nasa.gov/

you will have to hunt a while but the amount of carb design info in here is unreal.

 

[motorsportsdesign]

Thanks for the link! I have spent some time there, the ammount of work done there is remarkable!

Jonathan T. Schmidt

http://www.schmidtmotorworks.com