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I didn't want this thread to be about lap or not lap...
But..
First people need to know what is lapping before we could continue on with this topic. Because I've seen so called lap irons that looks like someone took a sand belt. Also, lapping isn't for those with deep scratches and wanting to get rid it... But to get the iron flat as possible.. In order to do this, you need a machine that is perfectly flat and cuts at a very VERY slow rate.. My builder would cut min. of 30 mins to couple of hours to cut an iron.. And all aspect of the iron is measured afterward.. He will not build an engine if its out of spec... nor would lap the iron unless the owner knows that it will be out of spec.. If a builder who said it was lapped and uses it without spec and with out of spec, then I'll be worried. My irons were perfectly flat in all direction. Not even a thousandth of an inch filler will slide thru.. And I've visually verified this as my builder showed it to me after lapped.
Bottomline, there is a lot of mis information and good information floating around the internet.. Its each of our own decision to listen to whom and do what we please.. I did my search and made sense to me about lapping.. Also, top builders such as Rick Engman, people at Racing beat, and few others in the country has a lapper to flatten the irons... All those who laps, their reasoning makes sense to me.. So, I lap... I'm sure many engines have survived without lapping and reasons could be given to NOT lap.. Again, I guess it all comes down to what each of us believes in and what its worth... Bottomline, 200-300 dollars to lap an engine isn't too much to some and a lot to some.. But if people really worry about money, hell, I guess they could build their own engines. Bottomline, I'm paying for his experience, his results over 30+ years, and his time. I guess it similar to going seeing a surgeon for a procedure.. One who has years of experience with positive results or someone who just got out of their residency..
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