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What if B cylinders
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tractorman View Drop Down
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Joined: 22 Sep 2009
Location: west central wi
Points: 1046 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tractorman Quote  Post ReplyReply Direct Link To This Post Topic: What if B cylinders
    Posted: 01 Mar 2015 at 5:35pm
So if i had an impaired B engine   and a couple  donor B engines with different  bore and stroke,  what would happen if i put one or two  of the smaller sleeves and pistons into a block with 2 or 3 of the larger sleeves and piston sets ?   
Play on 38 B 49 WF , working on D14, D15 B10, Bee 12 B110. use 185 and 190
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DiyDave View Drop Down
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Joined: 11 Sep 2009
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Points: 54125 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2015 at 5:58pm
Not a good idea to mix and match, it might end up sounding like 2 john deeres runnin...
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CTuckerNWIL View Drop Down
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Joined: 11 Sep 2009
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Points: 22825 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CTuckerNWIL Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2015 at 7:08pm
Unless you have regound a crank, the stroke is the same on ALL B engines. The worst thing you could do would be to put one cast piston, or 2 on the same side throw to unbalance things.  Whatever you do mixing parts with different diameter pistons, and different compression ratios, is likely to cause vibration problems.
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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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Steve in NJ View Drop Down
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Points: 11994 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 02 Mar 2015 at 8:13am
Probably would make a window in the block... LOL!
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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Joined: 12 Sep 2009
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Points: 5636 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gerald J. Quote  Post ReplyReply Direct Link To This Post Posted: 02 Mar 2015 at 8:52am
Or break the crank from the unbalance.

Actually it would benefit from matching the piston and rod weights. Why they are often bought in sets.

Gerald J.
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HudCo View Drop Down
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Points: 3912 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 02 Mar 2015 at 10:34am
well if you done that could you make a short video when you started it ?
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Points: 5106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 02 Mar 2015 at 11:57am
I have a lot of different used B & C engine parts available. I think I have 2 good usable matched sets of the smaller (3-14") pistons with sleeves, maybe a few od ones as well. Then I also have a selection of the 3-3/8" pistons as well. What is the number on the best ones you'd like to match up?
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Dick L View Drop Down
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Joined: 12 Sep 2009
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Points: 5087 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dick L Quote  Post ReplyReply Direct Link To This Post Posted: 02 Mar 2015 at 3:14pm
Originally posted by tractorman tractorman wrote:

So if i had an impaired B engine   and a couple  donor B engines with different  bore and stroke,  what would happen if i put one or two  of the smaller sleeves and pistons into a block with 2 or 3 of the larger sleeves and piston sets ?   


The strokes on your B's will be the same. If you place the same size on one and two and use a different size as long as they are the same size on three and four you should be able to hold the engine together. To keep it somewhat in balance you will want the same weight going down at the same time the exact same weight is going up. If you have one weight going up as another weight is going down you would get some shake at higher RPM's. If I had the parts and was short on cash I would do it in a heat beat. The difference between you and I would be I would never told anyone.

Edited by Dick L - 02 Mar 2015 at 3:16pm
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DaveKamp View Drop Down
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Points: 6069 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DaveKamp Quote  Post ReplyReply Direct Link To This Post Posted: 02 Mar 2015 at 10:36pm
I've heard of guys doing things seemingly much worse, and not having any major issues... just keep it all in mind when you're running it...
Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.
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