Originally Posted by
steve307b
Hey guys Ive been braking in my tuned .21 today. This is the first high end engine I have broke in and tuned. I managed to idle 3 tanks through on the work bench. And man I understand what a tight pinch means now. I used the heat gun quite a bit. I tell ya though it took forever to burn up a tank, like 30 plus minutes. After the bench I took it to the street for 2 tanks doing fairly slow passes and leaning the hsn just a couple hours or so. These tanks took like 30 min to burn up too. I read on the threads that these go anywhere from 10 to 12 a tank. Is this just how the breakin is because your not on the throttle consistantly? I just thought it was a big difference from 10 to 12 minutes. My temps were around 160 to 180ish.
as long as you have good smoke you are fine ...tyr not leaning the hsn as much as you would with like an os motor ....you may end up to lean on top inhmo ...i really didnt lean the top to much ...maybe a little on break in ...leaned more on the low speed needle on break in ...but either needle dont lean to much ...are you using foil or a sock on the head? it helps keep temps in and needle settings still rich for break in ....on the long run times ...you aer getting good traction cuz your on the street ...plus your hopefully just blip blip bliping it around ...so i can see that mine were the same way ....just dont get it to lean on the top .....after its got about a 1500cc of fuel on it ...take it back to stock settings on the needles and re-tune it with out the head covered ....
