Originally Posted by
rearviewmirror
Tonight I removed the back plate and head of my new Go 5-port and flushed it thoroughly with Nitro Juice 30% to give a good cleaning! The punch is so gawd damn tight! I really can't imagine the load it puts on the conrod breaking these things in. I sure hope race factor is stocking con rods now, because I plan to change this one around 2 gallons.
It's now mounted in the car with a P6 turbo plug and a Dynamite 007HT exhaust ready to be fired up for the first time. Going to break it in on Wednesday night, a local guy is bringing me two gallons of Nitro Juice 25%.
Nice one rear view. Yep, these puppies are super tight alright !!
Break in will take a while - like 12 to 15 tanks if you use the heat cycle method as described on page 78 of this thread by mugen46b. This is the method I would recommend. And remember - you won't get full power and performance out of the new motor until about the 1.5 gallon mark when the pinch goes away, so donīt be leaning it out to get a little extra until this time. With that much pinch you wonīt get the extra power you are looking for, just lean bog
Be patient, and you will be rewarded with a real nasty motor
Follow Massives tuning tips for the Gen 5 carb on the last page too. It makes running these motors sooo much easier and satisfying.