SU Carby Help Needed

**oldeskewltoy** · 24-05-2007, 01:35 AM

have you attempted to syncronize them??? It would account for poor running, but not likely for inability to start......

**sleepin22** · 24-05-2007, 12:38 PM

yeah. I measure the amount of air being sucked through the throttles and it was pretty much the same.

**Turdinator** · 24-05-2007, 06:29 PM

Originally Posted by sleepin22

yeah. I measure the amount of air being sucked through the throttles and it was pretty much the same.

How did you do this?

**sleepin22** · 26-05-2007, 03:20 PM

I used a thingamigig that measures vaccum thats being drawn through the carby inlet.

**sleepin22** · 26-05-2007, 03:26 PM

Originally Posted by terryo

if you send me the SU number, I'll tell you what they came off. the number is on a small alloy tag screwed to either the dashpot or float bowl. I have a big selection of springs, needles & jets for most SU's. I have been fixing them for over 30 years .
floats are rarely 'shagged". if plastic, they may get a few drops of fuel in them. usually its a faulty needle valve that gives gross richness. if you have SU's designed for angled mounting and mount them horizontally, or vice-versa, you'll always have grief. Bowls must be level.

Terryo, I found a marking on the tapered needle. They have "FX" stamped on them. Do you know what kind of car this needle this suited to? they are fairly short. I'm guessing something bigger than a 1200cc??