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Biggest Possible Bore WD

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ACMan2

11-24-2005 08:49:57




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What is the biggest bore and stroke you can have for a WD? I"m interested in starting to pull a tractor.




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slowsmoke

11-27-2005 06:19:03




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 Re: Biggest Possible Bore WD in reply to ACMan2, 11-24-2005 08:49:57  
there's one for sale in the HOOK right now at 440 cid. that's about 4 5/8x6.55. talked to a guy who built a 7" stroke, said the rod angle was ugly, and the rod journal was small. just depends how how much money you want to spend to put little pieces of metel on the track (or in the pits)!!! Don



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Butch(OH)

11-25-2005 17:20:54




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 Re: Biggest Possible Bore WD in reply to ACMan2, 11-24-2005 08:49:57  
Dont know the bores and strokes but 409CI is as big as I have heard of from reputable source. 389 is a more common "big motor". As Dick said no such thing as biggest or longst, just the biggest or longest yet attempted. Barney Taylor, Fletcher Ohio would know the numbers.



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wdtom

11-25-2005 12:38:37




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 Re: Biggest Possible Bore WD in reply to ACMan2, 11-24-2005 08:49:57  
Find an antique pulling club that uses a 5' or so chain, you willhave more power than you need with a stock wd engine.



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Dick L

11-25-2005 08:07:23




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 Re: Biggest Possible Bore WD in reply to ACMan2, 11-24-2005 08:49:57  
What ever the biggest bore is stated someone will go bigger. If your just staring to pull the biggest bore question should come after a coupla years of pulling. Biggest bore engines come with a biggest price tag. There is a lot more to pulling than big HP. After you are into pulling the question will be (What is the biggest bore for my WD that will last a few years without dumping its insides out on the track?)
I love the big engine race with some one I know where we both do all our own work. Try out measure, out think, and out machine that person. I dont fimd joy in just out spending. The main thing in pulling is to have fun.

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spud

11-26-2005 06:12:01




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 Re: Biggest Possible Bore WD in reply to Dick L, 11-25-2005 08:07:23  
OK the dude asked what the biggest bore could be, I would like to know to You all just talk about pulling,don't need big motors to win etc.... How about some numbers formulas Thanks Spuds



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Dick L

11-26-2005 09:39:43




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 You Are Correct in reply to spud, 11-26-2005 06:12:01  
You do not need big engines in your antique or classic tractor classes to win. I have six tractors here that I pull or have pulled. Two have been boosted some. That has not changed them into automatic winning tractors. I have won more times with the stock tractors. Going back to just wanting the numbers to do big engines. The numbers can be a difficult math problem. If I give you the numbers I use they will be challanged because every one has different numbers to plug in. As Butch pointed out what ever is done and told is just a bench mark to go bigger. One of the more important math numbers is what you have in your personal funds to work with. No one should put someone down for not having the funds to do what someone else is doing. I have the most fun looking thru parts catalogs that have the size spelled out on each part and seeing if I can make it work. I also like to take parts and place them on a layout plate to see if they can be altered to work in a project. Just Dream on what you would like to do different with an engine and use your pencil to prove it can be done, then do it if you have the time and funds. If you do not have the time or funds you still have your dreams which is very important for all of us. If you really want a big engine and have more money than you know what to do with, head out to one of the engine builders with your check book and make your every dream come true.

Just one of the things I did to see what could be done to a B, C, or CA head shown in the picture below. I would hear all sorts of opinions that were told to be facts. The real facts were in the measurements of the cross sections.

third party image

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