Small journal 302 crank into a Gen 1 350 block - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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  #16 (permalink)  
Old 09-07-2006, 07:47 AM
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Ian, you know your guns too!! I happen to own a 1963 Model 70 Winchester and it is the most accurate and best shooting gun I own. A member of the USAF rifle team and I were plinking Pararie Dogs years ago at 400+yards and he was missing on occasion and I was having a good day. He asked to try my gun and after 10 in a row, he wanted to buy it. Since it was a Christmas gift from the new bride, it was not for sale. Then he wanted to know who did the trigger work and got a blank stare since I knew nothing about "trigger work" in those days. He went on to say that was the best shooting gun he ever put to his shoulder. 45 years later, I have to agree.

My small journal 63 327 falls into the same nitch, though I do not think it is an exceptional motor as far as small journal 327s are concerned. I think the US Metalurgy was much better years ago than today even though we like to think we know more about it now (The University of Tennessee just started their Metalurgical Engineering Department in 1959 and I was in their first classes). The old time metal craftsmen that migrated to this country may not have been able to tell you why metal propertier were the way they were, but they sure could tell you how to achieve the properties you desired. That is what has been lost in this country since the "engineers" learned the trade from the books.(my opinion). I have not heard of small journal forged steel crank shafts failing and have always been noted for their strength. I think the migration to medium/large journal for higher displacement engines was more of a WAG than educated guess and once started, making them all the same size was more of a ease of manufacturing decision rather than strength/reliability based one.

Trees

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  #17 (permalink)  
Old 09-07-2006, 11:52 AM
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. Wag :d
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Old 09-08-2006, 05:59 AM
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My road cars have always run large journal cranks purely because I think a high torque/low rpm is right for longevity in a tow vehicle and I need over 350 cubes to move a car and trailer.
I have a T altered as a long term project and it will run a s/j 327 with a 6/71 and rev to the moon.No I haven't heard of a well prepared s/j crank failing either. Maybe some 'engineers' should ignore the claimed power outputs and check the times run prior to 1967 by sbc's under 340 ci and early Hemi's under 400 ci.
Btw, I just bought an 1881 build m73 rifle in 44/40. It now lives with a 1912 m92 in 25/20 (better than a 22hornet to 150 on hares, foxes etc), a 2001 build m70 in 375 H+H and a few Savage m99's.
Happy hunting, be the quarry datsuns or deer.
Ian.
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Old 09-10-2006, 07:45 AM
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The main bearings required to put a small lournal crank in a 350 block would be MS-1011H Clevite as we use these bearings in a lot of engines we build using the Honda rod 283 main cranks as we try to get rid of bearing friction and the parts are a lot lighter as well.
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