For any one else interested I've put the PDF datasheet for the Cherry 452 and 453 injector drivers in the incoming dir on the web site. Try : ftp://efi332.eng.ohio-state.edu/incoming/CS-452_453.pdf Christian Hack christianh at edmi.com.au EDMI Pty Ltd Ph : (07) 3888 3066 FAX : (07) 3888 3583