Originally Posted by
ABN Hoosier
So, i had a question for all of you Novarossi guru's
I am breaking in this Bonito. I was told that when the "metal pinch" in finally gone (not all of it I am guessing) and "It's jewel's drop" I can expect it to loosen up considerably and suddenly run rich as heck all of a sudden. At that point I can lean it and really feel comfortable with the tune because it is officially "broke-in". Ok, this has been told to me by some racers at my local track that run Novarossi engines, not Bonito's though, but they seem to have well tuned engines. This is something I have always envied because I am somewhat of a mechanic, but never really was good at tuning.
More info: I have been breaking in this engine with the heat-cycle method. I use a Competition-Heat engine heater. I bring up the temp of the motor to 190-200 then I start it. I idled about 5 tanks, 1/4 throttled 3-4 second bursts 4 tanks, 1/2 throttled 3-4 second bursts 3 tanks, 3/4 throttled 3-4 second bursts 4 tanks. I am about through 1/2 gallon. Always cooled engine with piston at BDC and allowed cooling between tanks. I DO NOT want to take this to the track until it is fully broke in.
My question is, on average at what fuel usage point do you guys see this "jewel's dropping" miracle happen? A gallon? A gallon and 1/2?? I have several gallons of S&W Fuel and I was told NOT to use this fuel until this occurs.
help a Hoosier out here guys...
I just want to get the most out of this engine.
I usually don't get that "nut dropping "all at once as your describing..... Myself I find the engines gradually loosen up over a period of 2 gallons..... Having it all occur all at once is not really a desirable thing..as that means there is a large amount of wear happening over a very short period of time.........
I find my Nova's take 2 gallons to reach prime....I run them much harder during the first 2 gallons then you show in your videos...... As the engine loosens up you will see a couple things happen.... One is temps will gradually drop, the more you run the engine, the cooler it wants to run... And the more you run it, the higher the idle becomes unless you lower the idle gap........Judging from your video it is going to take you quite a long time to breakin the engine... Your doing too much sitting and idling and not enough actual running....... When I fire up a engine I idle for 5 minutes to seat the bearings, then the engine is run continuous for as long as I can....usually at least 1 hour on the bench, and sometimes up to 3 hours depending on the engine...Then on th track it is tank after tank non stop