Ideal Bell Mouth

[OopsClunkThud]

I've been playing with 3D printed bell mouths to smooth the air flow into the carb on smaller motorcycles and scooters and was thinking the same could be applied on our 02.

From the work of Gordon Blair the ideal bell has an elliptic cross section and an opening quite a bit wider than any of the trumpets you can buy. Been playing with what angle they have to be tilted at to get them to clear each other and it looks like 30* does the trick. The intake length could also be changed to dial in the tuned length for a given setup.

The material is nylon and is quite strong and seems to deal with the temp at the carb just fine (on the bikes at least).

This is a design exercise for me (not looking for sales), but if anyone has been looking for a trumpet of a given length or shape that is not available, I could probably accommodate that. Was thinking it could work well in some of the Alpina air boxes, maybe.

[beast02er]

Oooh, very cool! If I still had my DCOE's on the car, i'd say I want one for making a mold! These inf CF would be cool!

You should try it out.

-Bryan

red73

[c.d.iesel]

great idea ! wish I had a weber!

there are nice smooth aluminum bell mouths for

both down draft and side draft webers,

but as you said you cound produce custom lengths for

different power band tuning

this one from Pierce Manifolds in Calif.

= $48 bucks

and from Pegasus $280 clams - really sexy