ran my setup that way for a long time (several months). then switched to a g20 ecu for the higher rev limit.
NEVER fouled a plug, made
MORE power than with the jwt VE programmed ecu and it just plain ran great.
you will need to advance the base timing to at least 20*-24* though. with my setup (3" intake and exhaust) and fuji header i actually
increased the Fuel pressure beyond 3 bar and
gained power. and the highway mpg's were still in the low 30's. same as it is now with the Calum RT. go figure