Originally Posted by bsmooth
Thanks Rich.
Could you also give me some tips on how you break in the engine using a run in bench? Any differences I should be aware of compared to running it in on the track?
Regards,
Steve
Everyone has an opinion on "motor break-in".
Here's what I do. Motor in car or bench. Not on track. First and foremost - use a heat gun to warm the motor to 200º F. Start the motor, run at a high idle very fat (almost 4 cycling) spitting oil out of the pipe - temp won't get over 140º - run 85 CC's. Then without stopping the motor bring the temp to 165 - 180º F run 4 tanks. I pull the sleeve at 4 tanks and look at the "pinch band" on the sleeve. If the wear is very even around the sleeve (360º) you'll have a dandy motor. If the wear is uneven - well that won't be the worlds best motor. Go ahead to the track - take it easy until you have about a liter through the motor - then take it to temp.
Remember preheat your motors - it will save you in piston and sleeve life - read $'s!