Standard they have a fuel regulator built in to the fuel rail OK for standard boost and slight increases. But when you start and get serious you can either replace the standard reg with an adjustible one like a sard or fit a sard one after the standard reg. so when you increase the boost fuel pressure is higher than standard to give more fuel for the higher boost.
In my conversion I have made a surge tank welded in the bottom of the standard fuel tank and used a VL high pressure pump saves having two pumps and external surge tank.
_________________ 4efte powered Clubman
supercharged 998 race car
|