Hi,

What are the venturis for that the Japs are using on their 160's? A friend of mine said it makes them more fuel efficient plus you get more power.

Also, they seem to come in 3 different internal diameters, 8, 9 and 10mm. Anybody know what one they are using? I was told the 9mm one suits the 160 best.

Cheers,
Angus

And what about the 140DZ, is it 9mm or which one is the best? I heard 8mm would be great.. I'd like to get the fuel consumption down a bit and more power doesn't hurt.

Where can I find one of these?

Are you talking about the funnel that are available at hobbynet-jp.com?
They are available 8, 8.5, 9, 10 mm.
I remember seeing a different one (much taller than these) somewhere in Japanese website, but I can not remember where. I think they posted 100 rpm gain.
Here are some pictures.

Those look an awful lot the velocity stacks I used to use when I was into drag racing.

They smooth out the airflow into the carb and speaking from experience on automotive engines they work.

I'll make a drawing for some of these if someone will make me a couple.

Mom....can I have a cnc lathe?....I only want a small one.

You can find this in this website : https://www2.hobbynet-jp.com/japan/m...ory2_ID=item04

Fred

I asked the dealer about the venturis and he told me it should not be used to increase power but to improve thrust curve in the mid range. I have always liked the response of my 140DZ but if it can get better why not. I have allways liked shiny polished aluminum parts especially small ones which are ment to do great things

140dz: 9mm or 10mm
160dz: 8mm 8,5mm or 9mm

He told me the two engines have different type of 'needs' and that is why the sizes differ.

Interesting. Might get one myself just to try out

Angus