The Volvo Parts, Accessories &
Performance Specialists Since 1963

Adjustable Fuel Pressure Regulator 1.5-8.5 PSI

Weber - 31800063 - 141611

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The carbs on B18s and B20s are very sensitive to overpressure, which is compounded by fuel heat-soaking and expanding in the fuel lines routed over the hot parts of the engine and in the carburetor itself in direct contact with the hot intake manifold. If you have problems with fuel overflowing out of your float bowl, it could therefore be a pump overpressure issue, a fuel heat soak/expansion issue, or a combination of the two. 

Whatever else you do to fix this problem, we definitely recommend insulating the carburetors from the intake manifold with phenolic spacers (see Recommended Products below) and rerouting the fuel-pump-to-carburetor fuel lines so they're further away from hot engine parts. If you're still having fuel overpressure issues, you can also try this inline adjustable fuel pressure regulator.

Replacement mechanical fuel pumps for these cars (including the ones that IPD sells) output between 3.8-5psi, which can be a little higher than the 2-4psi DGV progressive carbs seem to like. Made by carburetor experts Weber, this adjustable fuel pressure regulator has a range of 1.5 to 8.5 psi, allowing you to really fine-tune your fueling.

About Weber

Weber is a brand of carburators, that makes rebuild kits and full upgraded carburator kits for our older Volvo fans.

Weber is WELL KNOWN in the aftermarket performance industry for carburated cars of all brands, not just Volvo. 

Weber is a trusted name in performance and we are very happy to be able to provide these products for your Vintage Volvo. 

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