mugenhatchie

Hey guys just another question, will i be safe running my stock p72 ecu with 10 over arias 9.0:1 pistons and cylinders bored 10 over? just worried about enough fuel reaching the cylinder so i dont burn my new motor (ie running to lean or rich).i have stock injectors and stock fuel flow componants running the factory map on the ecu. motor only has 25 easy miles on it so far(is that to much already ?) If not what should i do? FYI no boost added yet. Thanks so much for your help so far. i appreciate you all bearing with me. THANKS!!!!

Jim Truett

As long as you are running the stock ECU, it will run closed loop during normal acceleration and crusing, so over/under fueling shouldn't be an issue. During WOT it will run in open loop, and at 9.0:1 may supply a little more fuel than necessary. Honda's run near 12:1 AFR stock in WOT acceleration, and with the reduced compression, you might see 11.5-11.8:1.

Bottom line, you won't hurt your motor if you drive it with common sense.