Originally Posted by
tony montana
I have a grp tuned in my mbx6 and I love it. Gets awesome run time and power is great. But it has alot of fuel threw and is low on pinch, Im the second owner, althou it still runs great. Im getting ready to order a new one. What is the best way to break it in and get it up to temp
stock settings ..wrap head with aluminum foil ...heat it up with a heat gun ...when it doesnt start lean the lsn a small hour at a time until it will start...when it does start it should idle at around 190-205 for an infinite amount of time .......or heat cycle it to 200 degrees ...i idled 3 tanks through mine before i put it down to run ......