Re: 7 series track testing

Posted by PackardV8 On 2010/1/12 21:40:52

"but do believe good poured bearings with high grade oil are quite durable."

Ok. True. But what kind of longevity do u expect to get from the engine in general??? I.E. is it unreasonable to say that nearly all engines prior to ca. 1955 (except maybe Hudson) required major overhal at 40K miles????

SO it becomes a personal judgement call. If u only drive 500 miles a year 25 mph in parades and soforth then the 40k mile longevity is just fine. It would take 80 years to wear it out.

But run 5k miles per year and a rebuild is in order every 8 years. BIG DIFFERENCE!!!

So even if we erroneously assume the babbit to be as good as inserts then the cost of rebuilding with insert conversion would most likely be recouped in 16 years NOT TO MENTION the ease of replacing the inserts IN-CAR if necessary.

SO, the babbit vs inserts is quickly becoming a 6 volt vs 12 volt type argument. It depends on individual owner demand.