Originally Posted by uniquexme
guys, i have just read this thread, and here are some questions as m a newbie, trying to break in my engine. (hope u guys dun mind if they are stupid questions)
"Start by opening the top end needle 1 full turn and open the carburetor to full throttle and hold it there" - how long to hold there before u open the HSN until engine flame out?
"From here, close the top end needle ¼ turn and restart the engine again running it at full throttle" - do we need to cool down the engine before starting it? also do u guys face this problem of stuck piston? coz last time when we break in our engine, we all have to use a philip screw driver to pry on the flywheel to get the piston down. and this has caused damages to the flywheel teeth. may i also ask if this is the process where the piston get scratches? how should we correct this problem?
"Run the engine full throttle for 3 tanks and shut the engine down and allow the engine to cool for 15-30 minutes" - full throttle all the way for 3 tanks to finish? really no need to release the throttle? and no need to cool down the engine between tanks? from here, there is no need to adjust the HSN? and no need to make the engine flame out?
may i know how much time is required for breaking in a brand new engine, rite from the start to race speed tuned? i am really interested to try out this WOT break in coz previously i idle 2 tanks, run at low speed around the track for 3 tanks, then WOT at starter box, closing the HSN till it get really lean, then richen it down (still WOT), and i found that idling and low speed running is really no useless. so i await some pro advise here. thanks
Yes until the engine goes out. You want to run the engine as rich as possible without stalling to flush all metallic flashing/filings out of the engine. So when it dies, lean it out 1/4 turn. The pressure might need relief from the fuel build up. Just unscrew the glow plug a few turns and give the flywheel a bump on the starter. Keep your eyes away the fuel will splash on you! I guess restarting it is up to you, either way won't hurt.
The three tank portion, yes, run the car full throttle. You will see that when the engine is full throttle with such a rich setting, it's like the engine is at a slight high idle but spitting raw/wet fuel. This part is very quick as you will go through a tank of fuel within 1-2 minutes.
The LSN and idle screws are very important.
Trust me, his method has worked just fine as the instructions stand. He's a great guy and if you have any questions, E-mail or wait for him to reply here. When using this method I was able to use one glow plug per gallon of fuel. Probably not a great idea, but I broke the engine in with the same plug!
His engine clean up tutorial works great too. Actually, all of his nitro tech works great.