Lifetime Premium Member
Date registered: Oct 2002
Vehicle: 1967 250 SL, 1963 220Sb
Location: Los Angeles / Altadena
Mentioned: 3 Post(s)
Quoted: 102 Post(s)
You can't switch them. The resistance (and I think even the direction of resistance is reversed) is entirely different. The bobbing around on the toilet style is normal. There is nothing that you can do about that. The cylindrical type has a small breather hole towards the bottom of the aluminum tube, that allows gas in and out at a slow pace. So nothing can change quickly inside the tube. The toilet float style has nothing like that, so when gas sloshes around as it is prone to do, the gauge bounces around.
I'm surprised you can find one of the toilet style at all. Where are you finding that? Even the cylindrical ones have become expensive.
Currently: 1967 250 SL, 1963 220Sb, 1965 300SE Lang, 1971 280SE parts car, 1972 Alfa GTV, 1965 Alfa Duetto, 1993 BMW R100R
Past: 1971 250 C, 1985 300 TD, 1967 250 S, 1968 280 S,1981 300 D, 1982 280CE, 3 Facel Vegas, Borgward Isabella Coupe, Alfa 2600 Sprint, Volvo P1900 (yes), numerous less interesting Volvos, ...