The reason for 30cm is to ensure you get a constant pressure. If you fit the pump and regulator right next to eachother and then test the fuel pressure you with either get fluctuations or not be able to set it low enough. The one way valve is an added piece of insurance against carburettor needle/float failure. If a float or needle fails, when you switch off your engine, fuel will continue to flow until the pressure drops. This fuel will make its way down the manifold, past your piston rings and in to your oil. Unchecked this can kill an engine. The one way valve operates at 2psi so essentially stops the flow of fuel when you turn your engine off. Safer and more protection. I always advise regulator checks of the oil level and a sniff test as well as looking down the throats of the carbs to ensure there are no leaks. Heat spacer gaskets, ethanol resistant additive and correct fuel pressure really help protect the carb internals🤙
Brilliant Mike thank you. This answers the email I sent a couple of days ago! Top work.
Had loads of people ask so it was about time! 😁
@@wayoutwestiemike couldn't be more timely for me! 🙂
Why the minimum 30cm between pump and regulator, and then again to one way valve?
Also is the one way valve necessary?
Thanks
The reason for 30cm is to ensure you get a constant pressure. If you fit the pump and regulator right next to eachother and then test the fuel pressure you with either get fluctuations or not be able to set it low enough.
The one way valve is an added piece of insurance against carburettor needle/float failure. If a float or needle fails, when you switch off your engine, fuel will continue to flow until the pressure drops. This fuel will make its way down the manifold, past your piston rings and in to your oil. Unchecked this can kill an engine. The one way valve operates at 2psi so essentially stops the flow of fuel when you turn your engine off. Safer and more protection.
I always advise regulator checks of the oil level and a sniff test as well as looking down the throats of the carbs to ensure there are no leaks.
Heat spacer gaskets, ethanol resistant additive and correct fuel pressure really help protect the carb internals🤙
@@wayoutwestiemike thanks Mike... That makes sense 👍🏻