tuning Webers
Posted: Sat Sep 05, 2009 6:55 am
having received my nice little airflowmeter ebay purchase thru the post yesterday ( second hand ?18!) i set to balancing the carbs & sure enough both pairs of carbs were out of synch so i gently twisted the spindles back into alignment & what a difference it made!!!!
Now the question i have comes from another coinidental discovery ....
Getting the airflow meter into position on carb 4 is a bit awkward with the pedal box being so close but i did it... however each time i put it on the revs went up a bit!!
Thinking about this i thought it might be something to do with mixture being a little too weak , but idle screw was already fully in . (incidentally, the engine side of this no 4 throttle plate is black with carbon - what does this signify pls?)
After a bit of headscratching i just pushed in the bottom of carb 4 with my hand , mimicking pressure when flowmeter is squeezed in past pedal box and this replicated the rise in revs - it doesn't happen with any other carbs and the faces of the joints are in good nick and o rings are new . I plan to put on a little sealant ( i seem to remember there were remnants of silicone seal around the old O rings which i took to be a bit of a bodge ) can anyone recommend what to use pls? is bog standard silicone seal okay or sould i use something else , blue hylomar perhaps??? - i cant remember if this is petrol resistant or not.
cheers all,
RichC
Now the question i have comes from another coinidental discovery ....
Getting the airflow meter into position on carb 4 is a bit awkward with the pedal box being so close but i did it... however each time i put it on the revs went up a bit!!
Thinking about this i thought it might be something to do with mixture being a little too weak , but idle screw was already fully in . (incidentally, the engine side of this no 4 throttle plate is black with carbon - what does this signify pls?)
After a bit of headscratching i just pushed in the bottom of carb 4 with my hand , mimicking pressure when flowmeter is squeezed in past pedal box and this replicated the rise in revs - it doesn't happen with any other carbs and the faces of the joints are in good nick and o rings are new . I plan to put on a little sealant ( i seem to remember there were remnants of silicone seal around the old O rings which i took to be a bit of a bodge ) can anyone recommend what to use pls? is bog standard silicone seal okay or sould i use something else , blue hylomar perhaps??? - i cant remember if this is petrol resistant or not.
cheers all,
RichC