Join Date: Nov 2001
Location: North Central Illinois
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Re: New Motor questions...
It should only take a hundred or so miles before it gets full compression . On a new or rebuilt engine , never run it at any sustained speed for any length of time , best way to break them in is to run it up to about 40 mph and let it coast down against the trans , then back up , back down , ect . Modern rings really don't need to be seated all that much , but keeping the rpm's down below 4k for the first 500 miles is a good idea . Also, after the initial 500 , change the oil and do not use any synthetic for at least 3500 miles . Have you tried to check it's compression yet ? What muffler are you running , good back pressure ? BTW, that Pony carb is too small to really run correctly with that head/cam combo , in my opinion ....