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boyt911sc boyt911sc is online now
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Join Date: Mar 2002
Location: Philadelphia, PA
Posts: 12,770
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Man-hour........

Quote:
Originally Posted by bpu699 View Post
From beginning to end?

You started on a Monday and were driving on friday?



bpu699,

The number of hours (40~65) quoted by Fred A. is the total man-hour an experienced person would spend to complete a typical 911 engine rebuild. That is the estimated or calculated time spent to finish the job. That is totally different from the time frame you started the project to completion.

Secondly, it also depends on your proficiency. Since we don’t do this job regularly like the pros, it would take us more man-hours than the projected 40~65 man-hour. I made a time-motion study of a couple engine rebuilds I did in the past and accumulated 70 man-hour total on the worksheets over a period of several weeks.

Another experiment I did was to determine how long it would take me to assemble a 911 engine using pre-cleaned and ready to install engine parts. All parts were pre-checked and inspected prior to assembly. I did three (3) separate runs in a span of 2 weeks and were able to complete the assembly under 8 man-hours. At a leisurely pace, 12 man-hours is easy.

For me, it is not how fast you completed the rebuild but how well you did the job at your own pace. Who cares if you are slower than John Doe and takes longer time to get to the finish line? For me, it is all about enjoyment and satisfaction.

Tony
Old 01-06-2020, 02:36 PM
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