Topic: Russ Collins Webers

[scottly]

So what are the whizbang magic features?

In addition to the already mentioned adjustability, the Weber is supposed to do a proper job of mixing fuel and air at a lower pressure differential across the venturi than most carbs, and was considered to be the next best thing to fuel injection, which requires no pressure differential at all. The emulsified fuel from the main circuit is delivered through the "bomb site" in the auxiliary choke, in the center of the airflow where the velocity is high, rather than the needle jet at the bottom of a slide carb, where the velocity is low.
I have accurately measured 51+ MPG over a 700+ mile trip, and have noted mileages as high as 60+ at lower speeds.

[754]

I was getting 53 -56 mpg or so on my wore out 836, on a 1900 mile trip.
Buddy riding with me on a stock K8 750 always bought more gas than me..

 Sometime we have folks on here struggling to ge better than 45 mpg.

[Lostboy Steve]

That's why a lot of guys with rotary motors run them, because they work really well in the higher rpm areas and that's where the rotary (and most motorbikes) excel.


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[krksquared]

Webers can be great. I'm building a 428CJ for my 69 Mustang with them. They are 48IDAs. I used a 45DCOE on a Lotus years ago. Worked well but was a bit sensitive to altitude. Never thought about them on a bike.

[Lostboy Steve]

That's a lot of air moving right there.


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[BomberMann650]

Damn!  What a motor!