what is your base fuel pressure at? if you need just a bit more you can crank it up a bit ive always used the bosch 220lb hig impedance injectors with great results. In fact I run the bosch 220lb injectors on my 02 harley truck. I daily drive it ocassionally on regular pump gas with no problems. She idles perfectly at stoich still using the stock eec-v ecu which has less processing power than the 03/04 cobra ecu.