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Case Tractors Discussion Forum
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DC overhaul

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SC2

06-29-2005 16:51:11




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I am needing to overhaul my engine in my DC. Would like to add more HP . Any ideas




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caseoholic

07-22-2005 17:55:41




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 Re: DC overhaul in reply to SC2, 06-29-2005 16:51:11  
Send off the 400 carb to be reworked and get .60ths off the head.that all i did to my dc puller and its points champion



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SC2

07-04-2005 20:53:27




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 Re: DC overhaul in reply to SC2, 06-29-2005 16:51:11  
Thanks for all the info. Can you steer me in the right direction for these parts ( 5505 Head, M&W Pistons, mild cam )? Thanks Scott



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Don Rudolph

06-30-2005 20:05:53




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 Re: DC overhaul in reply to SC2, 06-29-2005 16:51:11  
If you want to spend a lot of money you can go with an LP head (6128) that has smaller combustion chambers than a 5505. You can shave either of these heads quite a bit providing you shim up the rocker arm bases. You can get really exotic and polish the ports. You can use a bigger carburetor such as off a "400". If you really want to go crazy you can bore the motor out, put in different sleeves and get more cubic inches as well. I believe the limit is 4 1/2 or 4 5/8. Lots of inches in that outside extra 1/2". I am not sure about stroking the crank, but it is done on LA's to get over 900 cubic inches. I would guess some DC fanatic could tell you the secrets. You can even go so far as to get a custom cam ground for your engine. Some people prefer using a distributor setup as they think timing can be better dialed in. I am sure there are other tricks, but that is about all I can tell you. Good Luck! Don

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Brutus

07-01-2005 13:27:37




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 Re: DC overhaul in reply to Don Rudolph, 06-30-2005 20:05:53  
I am putting my motor together. 4.375 bore, ported/polished 6128 head, 400 carb, dist. ignition, hotter cam, 9.5 comp ratio, ect. Does the 400 carb need to be reworked for 331ci? Is 75-80 hp an unreasonable goal at 1529 rpm's? I was putting a 6.875 stroke in a CC with H IH rods, the cam gets kind of thin to clear the rods. I have heard of motors 4.750x 7- 496ci. You have to reinforce the rear main or you will tear it out of the block! m&w domes, 5505, mild cam and carb work makes a nice runner, 55 to 60 hp It's what I pulled for years, just want more power!

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Don Rudolph

07-01-2005 16:37:56




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 Re: DC overhaul in reply to Brutus, 07-01-2005 13:27:37  
I can't tell you. I would guess it would work fine stock at low rpm's. I just listed what many pullers have done over the years. I can tell you that if you can only run 1529 rpm that there is then no substitute for cubic inches. Also the rear main will need to be taken care of. In my interviews with old Case dealers several have mentioned the weakness in that area with 4 1/16 M and W's running pretty close to stock. They would let go under really hard pulling conditions. Let us know how it turns out. Don

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Nedd

06-30-2005 05:48:34




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 Re: DC overhaul in reply to SC2, 06-29-2005 16:51:11  
Hi. Compression Head cast.#A5505A and if you're lucky enough to find 4 1/16" domed pistons. They were aftermarket for the D series. Good luck.



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