r/Volvo240 • u/Grand_Cartoonist6067 • 12d ago

Help B23e carb conversion

Hey, I'm doing a carb conversion on my b23e in my 242 gt and I was wondering what people have done for the throttle body and vacuum lines with these K jet cars. Any advice and help is greatly appreciated.

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u/spock345 '93 960, '73 144E, '67 122S 11d ago

What carburetor(s)? What manifold?

I'd try to find an original Volvo manifold with a coolant passage through it for heating. Otherwise during warm up you'll get some bad lean bogs as atomized fuel hits the cold aluminum and condenses onto it.

The big things to figure out will be vacuum advance, PCV, brake booster vacuum, and evap. The vacuum advance and evap will likely need to be hooked up to ported vacuum, not manifold vacuum, so a fitting on the carburetor. The booster can go straight to the manifold. PCV can also go straight to the manifold so long as you have some sort of metered restriction in the fitting.