I have a 1989 110 which left the factory as a 3.5 v8 on carbs.
Last year I replaced the engine with a 3.9 on hot-wire which works very well.
I left the original fuel pump in the tank and fitted a pattern pump of the Bosch style on the upper inner wing. This has proved very noisy.
I am not sure if these pumps are inherently noisy or whether it is noisy because the supply from the pump in the tank is inadequate leading to cavitation.
I need to decide whether to replace the Bosch type pump with something better maybe a genuine Bosch, or whether to replace the pump in the tank with a high pressure version.
If I replace the pump in the tank is there a pump that will fit the tank without modification to the tank and will I need to upgrade the fuel lines?
I know this has been raised before but not in this much detail.
Idris
Last year I replaced the engine with a 3.9 on hot-wire which works very well.
I left the original fuel pump in the tank and fitted a pattern pump of the Bosch style on the upper inner wing. This has proved very noisy.
I am not sure if these pumps are inherently noisy or whether it is noisy because the supply from the pump in the tank is inadequate leading to cavitation.
I need to decide whether to replace the Bosch type pump with something better maybe a genuine Bosch, or whether to replace the pump in the tank with a high pressure version.
If I replace the pump in the tank is there a pump that will fit the tank without modification to the tank and will I need to upgrade the fuel lines?
I know this has been raised before but not in this much detail.
Idris