HI,
AS far as im aware the std pump will cope if in good condition with
your 3,bar setup on greens 803's all cosworth, except escort cosworth,
check boost limit for chip, i chipped cosworth with this setup with a turbosystems chip
and peaked at 24/25 psi of boost, solid 23psi. with rs500 intercooler.
and champion plugs 57/ 59 c's after checking fuel pressure and delivery
of pump including voltage at pump, and setting co% to chip recommended requirement. also
flow checked the injectors although they were new, 1, was faulty.
DAVE R