XS HP

Simple question-I am running an aggressive h/c setup (see sig) which was tuned with Tr6's in the car with the intent of running spray in the future. I have since decided to keep it NA. My question is whether i would need to change my tune in order to run the Tr55's, or just change the plugs and drive. Thanks

LS1-450

iTrader: (33)

Change & drive. Did he set the timing for spray or do you have a box or switch for when you were gonna spray? If he set the timing up for spray, then you are losing power N/A. Tr55's are one plug hotter. As long as he tuned your N/A air/fuel to 12.5-12.8 during WOT you should be OK.

XS HP

Tuned for NA only. Thanks man, I appreciate the info. Figured i shouldnt leave anything on the table, so get the hotter plug.