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F-20 With a BIG BLOCK FORD

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Alan

04-20-2000 10:06:57




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Please help me (if I'm not to far beyond help yet!) I have a neighbors F-20 some time in the 60s he started to widen out the frame a dropped in a Y-block V8 Ford, to make a long story short the motor never started. Now I have the tractor and I want to put a 390 big block on the tractor with a C6 auto in between the motor and the orignal 4 speed. The tractor will make a neat piece at the show and I can run it at the pulls for fun (If anything it will be a rake tractor like no other!!). I have enough parts to complete the tractor laying around and the only thing I will have to buy is a 4bbl manifold, the C6 tranny and tires. We are putting new (niped and bent frame rails on the tractor to get the width for the new motor. Up front I'm completly doing away the old post steering and putting a front end off on OLD 2 ton bus. This wil keep the front end even when it's off the ground and provide some cusion to come back down on. I will only keeep the original transmission rear end final drives and Radiatior. Now my question if I had to put a year on this tractor how do I find out. The motor is long gone, are there numbers elsewere! It had the twin gas tanks (soon to be replaced by polished pony kegs) if that helps. I also want to know if any one knows much about the final drives on these tractors. Will they stand up to the added horse power and speed? can I take the final drives off and run direct off the axels by cutting the tube in some and adding seals? Alan ballntne@miusa.net

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RB DONT.....

04-22-2000 05:59:17




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 Re: F-20 With a BIG BLOCK FORD in reply to Alan, 04-20-2000 10:06:57  
Ruin it by putting a DORF engine on it!Put a CHEVY engine on it!Either one you do it aint gonna last long!!!



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Ludwig

04-20-2000 17:12:16




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 Re: F-20 With a BIG BLOCK FORD in reply to Alan, 04-20-2000 10:06:57  
Have you actually looked at the rear end of this tractor?
Have you actually looked at the final drives?
I'm not positive about the original HP on an F-20 but I'm thinking something like 10-20, so you're looking to build a 100-120, you'll kill it...



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john d

04-20-2000 11:29:41




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 Re: F-20 With a BIG BLOCK FORD in reply to Alan, 04-20-2000 10:06:57  
If the weight of the tractor is anywhere close to stock, the limiting factor as to what it can pull will be TRACTION. If this thing can't get any more traction than a stock F20, the drive train will probably live a long time. Start figuring out how to lock those tires into the dirt better, and the drive train suddenly becomes too weak. In short, if you keep it in 1st or 2nd gear, and don't weight it heavily, I don't think you'll hurt it much!

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Alan

04-20-2000 13:30:41




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 Re: Re: F-20 With a BIG BLOCK FORD in reply to john d, 04-20-2000 11:29:41  
This might be a problam when it comes to traction. We planned to used wide pulling (smaller combine) tires. We are going after the "Nitro Puller" look and thought the increased tire speed would result in some better pulling abality. I have some concerns about the final drives holding out with the increased HP, Toqure and RPMs expecially with the larger tires taking a bigger bite in the ground. If anything the larger side walls might wrinkle/give more than a skinny tire on a tall rim and would absorb the toqure coming through the gears and make it easier on the finals. I guess we will put the fuel to it for once and see what it dose! We do have two extra final drives, a tranny and rear diff. We can at least try once or twice before I'm out of parts! What the hey let's make some noise!

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john d

04-20-2000 15:27:15




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 Re: Re: Re: F-20 With a BIG BLOCK FORD in reply to Alan, 04-20-2000 13:30:41  
The tire sidewalls will possibly flex enough to absorb some shock. If the overall diameter of the tires is LARGER than the original outside diameter of the F20 tires, you will be putting more strain on the drive train. If the outside diameter of the combine tires is SMALLER, the strain on the F20 parts will be lowered. There are tooooo many variables here to make blanket statements about the life expectancy of those parts! But in general..... if the rear tires are a smaller diameter, and the total weight of the tractor is close to the weight of the F20 in working condition, the drive train will take a lot of abuse as long as it stays in the lower two gears. The tires will slip (hopefully) before the parts break! Turning a shaft faster allows more hp to be transmitted with the same torque. Too much torque is what will break your parts. That doesn't mean, however, that the F20 rear end is going to last a long time if the engine is turning 8000 RPM!

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Michael Ingram

03-10-2001 17:34:14




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 Re: Re: Re: Re: F-20 With a BIG BLOCK FORD in reply to john d, 04-20-2000 15:27:15  
I recently purchased an F20 Farmall. I am considering taking out the original motor and replacing it with a 318 chrysler with 727 tranny. What problems am I probably going to incounter? I thought it might be possible to mount the tail shaft to the existing tranny shaft. Has any one out there done this kind of set up. how it you go tranny to tranny. Any info would be appreciated. You can email info to me at michaelalleningram@hotmail.com

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Brian

04-20-2000 10:39:46




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 Re: F-20 With a BIG BLOCK FORD in reply to Alan, 04-20-2000 10:06:57  
Sounds like a lot of work for a tractor that when stock is quite a nice piece of equipment.I guess if I went to a show and saw this tractor that you want to put together sitting there I would probably say to myself "Man all that time could have been spent bringing her back to original".
As far as I know the original tranny of the tractor is made for alot lower rpm's than your V8 will spin. And don't be surprised if it doesn't hold up to the torque either. Just my opinion...I would rather hear you say you're making 'er right again. I'm sure you will get a few responses with better info on the tranny and torque handling ability of this set-up.....

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Alan

04-20-2000 13:53:07




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 Re: Re: F-20 With a BIG BLOCK FORD in reply to Brian, 04-20-2000 10:39:46  
If you seen this tractor you would know why we are not making here original again. The owner I got her from started this in project in the 60s. He started by cutting the frame off in front of the tranny and out behind the radiator suport and bolting it back on to the out side of the existing frame "stubs". The steering rod has been pacthed and repaired to the point of being dangerours. He put a motor and 4 speed car tranny in the newly formed wide frame and I guess welded the car tranny in one of the gears (or at least it don't move out of that gear with any sort of ease!). He even went as far as to cobble together a foot clutch to the front tranny. It is a neat piece of our farming community's history and we tought it would be fun to get running, not to mention it will clean up some old parts that the horses keep tripping over. I sure like the old tractors and have some original stuff I like to drive. Right now I'm starting a 53 Case LA. I also have Farmall M that is waiting to get a make over some day when I have a thumb up my butt I might even restore my every day work tractor A 706 Diesel. This tractor was pretty much a rear end and part of a radiator one day I just decided how much fun it would be to run a half-assed nitro burner down the track on a small (really tiny small) budget. Like I said even if it won't pull we can turn some heads pulling a hay rake with it! ( have you ever pulled a rake at 40MPH? you can get a lot of hay put up that way!)

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The Red

04-20-2000 10:39:13




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 Re: F-20 With a BIG BLOCK FORD in reply to Alan, 04-20-2000 10:06:57  
Alan the F20 is a sturdy tractor but I think that settup will have you spewing parts on the fairgrounds.



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Alan

04-20-2000 13:18:17




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 Re: Re: F-20 With a BIG BLOCK FORD in reply to The Red, 04-20-2000 10:39:13  
I hope were not talking MONSTER type of spewage! We only have two extra final drives and one extra each tranny and rear diff. I guess we have about 6 different DC Case lying around might have to adapt the Rear diff/tranny on them to fit the new F-20 frame. I think they could hold up better.



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The Red

04-20-2000 14:41:49




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 Re: Re: Re: F-20 With a BIG BLOCK FORD in reply to Alan, 04-20-2000 13:18:17  
Well good luck. Sounds like an expensive type of hobby but I wish you well. I haven't figured why I bought a combine yet..... .....



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Rick

04-20-2000 19:04:32




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 Re: Re: Re: Re: F-20 With a BIG BLOCK FORD in reply to The Red, 04-20-2000 14:41:49  
Alan it`s guys like you that make my old F-20`s worth more every day, keep up the chopping.And spend that money it`s good for the economy.



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MITCH

02-24-2002 00:14:07




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 Re: Re: Re: Re: Re: F-20 With a BIG BLOCK FORD in reply to Rick, 04-20-2000 19:04:32  
ALAN I AM RESTORING A F-20 AND NEED PARTS SO WHATEVER YOU DONT USE LET ME KNOW WHAT YOU WILL TAKE FOR THEM. MITCH



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