Date registered: Jan 2006
Vehicle: 73 280SE 4.5, 71 300SEL, 03 BMW Z4, 72 Fiat 850, 80 Triumph TR7, 85 Porsche 911
Location: DC Area
Mentioned: 1 Post(s)
Quoted: 95 Post(s)
RE: 1975 280C Driveability vs. Original
I replaced my solex (off a 280C) with a Weber (I later sold the car to a buddy who finally fixed the outstanding issues, as listed below). The weber came with all the mounting and adaptation stuff one would need, so the installation took me about 20 mins. Afterwards though, I had one heck of a time getting the car to run right. My milage went into the toilet, and I was constantly fiddling with the jets, the mixture, etc. Looking back on it, I wish I had someone look the fuel system over from top to bottom to see if my carb was as crappy as I had thought. The solexes, by the way, have a reputation for being complicated and cantankerous, and difficult to set up correctly. Given the procedure to tune the suckers, I've no doubt the reputation is well earned.
My suggestion is to find the plumbing diagram for your car, see where the vacuum lines go and come from, and see if the "fix" is easy.