hi
SO WHAT HORSPOWER SHOULD I GET OUT OF A RS 500 WITH A STAGE 1 COLLINS CHIP AND WHAT MPG SHOULD I BE GETTIN I PUT 18 QUID IN AND GOT 80 MILES BUT I HAVE CLEANED THE VALVE THAT CONTROLS TIKOVER NOW IT RUNS BETTER
well mine at 25psi boost on grey injectors and is a proven 371BHP on STD compression and I reckon im getting 12 -16 MPG roughly
cossyman