Originally Posted by HOT 1200
TWIN Weber IDF 36 running 26mm venturi, 115 main 55 idle 215 Airs (Currently experimenting with emulsion tubes)
The Alfa F57 that came with the carbs is actually smoother than the F11, strange as F11 is normally the goto Emulsion tube for VWAC Perhaps the F57 is more suited to the small capacity engine
Genuine Bugpack 1200 header and quiet pack......
Will be doing some 0-60 testing soon, will let you know the times
From my knowledge of emulsion tubes they kinda work inversely to the revs/load the engine is at.
So at low revs the holes at the top of the tube are being used and as the revs rise the fuel level drops exposing the lower holes.
Hence you can fine tune your AFR by adding or removing holes at the respective point on the tube for the revs and load. The bigger or more holes then the richer the mixture becomes. I think it's richer, could be leaner as been ages since I messed around with this.
I fine tuned my 1641 with twin ICT's and a 009 along with lighter springs in the 009.