what is proper break in time??

[BTEC]

Btec's break in period is when i start it and make sure the cooling system works fine and i dnt have any leaks. After that, its a race car. Meaning if i had to re-ring the engine and put a piston or 4 (the exact same specs as the ones that came out), the a/f and timing shouldnt have changed so it should be very close to where it was so im balls to the wall in that beech.

[DirtyMechanic]

I respect your opinion, but i know a thing or 2 myself.

I dont see how you can say the rings seat before the motor is ever fired.

Do you not agree with Hones then? I mean the purpose of the hone is to wear the ring evenly into the bore.

Vacuum is what cause the rings to "push out" but if the bore is too big, they have nothing to push out against on.

Follow me?

Id love to hear your theories :thumbup:

im sorry i just have to correct you on this. it is cylinder pressure i.e. open throttle that pushes the rings against the cylinder walls. vacuum is used to help remove the ring and cylinder walls particals. hence the part/larger throttle 3rd 4th-5th gears pulls and the slow decel in gear.