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chris11

Building a Pulling engine

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Hello all, A lot of you guys know I have been sick. I have been Battling cancer and been doing good with it. Its giving me a chance to think how short life is. So I Want to build a Hot engine for a project im working on. I was going to build a k341 Kohler, started picking up some parts. Like everything I do for some reason I have to go over board. Well I started with a stock block. Picked up a used crank stroked to 3.75. Then I find out the engine I wanted to build you cant use stroked crank, and the max bore size was only .030 bigger then stock. The more I looking into it I wanted MORE. So I have collected some really nice bunch of parts to play with. Im not using the stock block. I picked up a J2 after market block Very HD. 10,000 all day   Billet cam with a .625 lift, billet rod, and piston. The stock size was 3.75 bore. The new bore is 4.125 and I have still more sizes I can do. The crank I found out wasn't as good. so I ended up buying new, Billet crank . 3.75 stroke. The engine building thing is so many ways that guys do thing , no one will tell you anything, as far as port size angles any thing. The block I have I have to machine ports lifter holes center lines aren't the same as stock. so im working everything thing out 3 time before I do anything. here's some pictures of the parts I have so far.

 

 

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:scared-eek:  WOW! Beefy block... 

looks like it'll pull like a beast, once completed. 

Nice to see you posting again Chris.  :handgestures-thumbsup: 

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Didn't know about your battle, but great to hear you're chins up, and doing good. :handgestures-thumbupright:

 

Like all of the other builds I have seen of yours, This one's looking top notch as well. :bow-blue:

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Chris not sure your machining capabilities but I know a couple guys that can help you if your interested. I also know of a complete 50.5 that is in the 71-73hp range on alcohol that is for sale. Really good price. far less then what your going to have into what you have to make 70hp.

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I can machine Anything. And I never say no for help. pm sent

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Well I have tested crank fit and got the end play I need. Next is test fitting the cam. setting cam ever in there I have to grind a little spot on the block opening. I always try taking from the block and not the parts. Now cam and crank fit . I can make the side shim I need for cam centering in the crank . Because of the stroke the rod has to be right in the middle.

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Next step is going to be setting up to bore block and cut rod reliefs at bottom of cylinder. You can see it this picture that I have to locate where lifters have to be centered in the cam shaft lobes. But need to test rod into block to make sure rod isn't going to hit lifters.

 

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Edited by chris11
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Chris, You will probably have to clearance one of the crank throws also to clear one of the cam lobes. Not sure which one, its been a while since I had the pan off my Pro/Super. Was the cam matched with the stroke you are running? I have heard with longer strokes it limits the lift of cam you can run, because of the clearance issues.

Edited by Deere Hunter
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I had him make the cam to my stroke. Im going to bolt the weights on and check. Didn't do much with it today. I am using 1.5 lifters so I know they have to be cleared.

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Heres a few more parts.Big valves and bigger base lifters for the cam.

 

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What size valves do you have? The exhaust valve looks small but maybe it's an illusion.

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By today's standards that's a little small. I'm working one one now for a friend. I had to offset the valves to get them to clear each other. Only about 3/4 of the valve stem sits on the tappet adjusters with the amount of offset they had to have to make them fit. I plan to modify the tops of the adjusters so the whole stem hits it before I go too much further. He had a 2.025 intake and a 1.650 exhaust and they weren't big enough.

Edited by Jim_M
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You know the drill....If I tell you, I'll have to kill you.

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No, I've been so busy working on everybody elses stuff that one of mine is still in pieces. I hope to finish it up this weekend.

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This engine is so heavy it think it would break frame on a rj. wish it was aluminum. But don't get me thinking. Monday ill be starting machine work so ill have some pictures to post. I have so many projects I want to get done. I have been working on a panzer restore, Going over a Pulling chassis. complete over haul. Also getting the wheelhorse up and pulling this year.

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Both of mine are back together and ready to go! I have to finish my friend's engine and then it's back to all the things that my wife has been "requesting" for the past few weeks.

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Im going back wards,The engine is all good. Its the tractor I got to put it in. What a mess. Im very picky when it comes to building something. And this this is bad. Im having some rails bent up

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