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slowbubblecar · 09-13-2005

Quote:

Originally Posted by EclipseGST

The way I have been told is to break in a motor was to be a little hard on it. If your gentle with it, it takes longer for the rings to seat to the cylinder walls. Change the oil and filter frequently and dont use a cheap filter either.

My opinion is to drive it hard but remember that its a new motor when your doing so. Take nascar for example... A few mins after the first start up on a brand new/rebuilt motor they rev to 6-7k rpms. Then they go and pound the shit out of them for 500 miles, not sure if they rebuild them after every race but if they dont then they go even longer. Same goes with other race cars. Also every car factory doesnt break in the each brand new car.

I built the 6 bolt in my car right now, when I first started it I let it idle up to normal temp with random revs to 3k. Then I shut it down and checked all the fluids, made sure there is no leaks and then took it for a drive. drove 25 miles thru town, stop and go traffic. Then changed the oil. Took it back out on the freeway and did random pulls thru 2nd and 3rd. Put about 100 miles on it, then changed the oil again. I was hard on it but was careful to what I was doing. 250 miles later I brought it up to the MNSC meet when I first met you. Since I built it I havent had a single problem with it. Many, many beatings since and not one thing wrong with it. Did a compression test 3 days ago... 160-162-159-161. Pretty decent seeing what I put it thru.

The way an engine is broken in can be argued to death. Its really up to you how you want to do it. Just make sure you change the oil and filter a lot. I'd recommed doing it twice withing the first 100 miles, at 500 miles, 1000 miles, 2000 and every 2500 after that. I did it a little more than that on my car but I was just being causious.

These are MY opinions and what I have been told. Sue me if you dont like it.

What compression pistons did you put in it? A 1g block we have that has 125,xxx miles on it is a stock block never replaced or rebuilt and it still had 150 across.