Hi everyone. I was reading through a few websites and there was one that refered to a check valve that you can get for the fuel line. To stop the drop in pressure when the fuel starts to get low in the tank. I was wondering if any of you lot have tried this on your car and what were the results.

I think your talking about a boost bottle. I dont have one but I heard they tend to leak and make it difficult to tune the engine.

Check valve only work properly if you have a presure regulated fuel system.
Like the YS airplane engines
The check valve will not work propery with a comon 1/8th scale buggy fuel system
It will cause too much presure at lower rpms that fads off causing a very inconsistant low end needle setting

A good tuned pipe is all you need