I have just installed a Kirban AFPR, and a speco guage on AU2XR8 with some mods (std 24ld injectors though).

It fired up OK first time, but want to know what the correct pressure is to be. I've heard around 38psi is a good start point. I have mine sitting around 40psi. it runs fine.

What is the effect of lower or higher pressure settings? Iv'e heard higher pressures run a bit rich.

I don't want to get a re-tune at this stage, because I intend to do some mods later on.

cheers