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Ford 9N, 2N & 8N Discussion Forum
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Big Bore Ford Jubilee

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popshoods

02-11-2019 05:41:19




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I have done some re search on the 134 , 172 , and the 192 Ford Industrial Engine . All three have the same stroke of 3.6 inches . All three use the same connecting rod part number . Same wrist pin . It would seem to me that a person could REMOVE the sleeves on a Ford Jubilee 134 and bore it to 4.13 inches and install 192 Ford Industrial Engine pistons . Does this sound plausible to you ? George in Harrison Ohio

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TheOldHokie

02-11-2019 10:32:15




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 Re: Big Bore Ford Jubilee in reply to popshoods, 02-11-2019 05:41:19  
Quoting Removed, click Modern View to see

OD of the 134 sleeve is just over 3.650 so you are talking about roughly .250 overbore in the block or .125 off the wall.
TOH



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popshoods

02-11-2019 15:06:46




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 Re: Big Bore Ford Jubilee in reply to TheOldHokie, 02-11-2019 10:32:15  
You are right . .250 inch would be required , and would be way too much metal to remove . I screwed up on my dimensions / math on my last post . My mistake .



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popshoods

02-11-2019 10:51:42




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 Re: Big Bore Ford Jubilee in reply to TheOldHokie, 02-11-2019 10:32:15  
That would be a sleeve wall thickness of about .112 inch . Sounds about right . Leaving the sleeves out and boring to 4.13 inch might be a stretch . But I think it sounds like the 134 ** without the sleeves ** would be a bore size ( + - ) of 3.9 inches which is actually the stock bore size of a Ford 172 CID . So it may be an easy improvement to install 172 pistons in the 134 block without sleeves .

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HFJ

02-11-2019 07:59:50




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 Re: Big Bore Ford Jubilee in reply to popshoods, 02-11-2019 05:41:19  
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"The question was NOT about swapping out a Complete engine / block . The question was about using the ORIGINAL 134 Jubilee engine block and boring it out to receive the 4 Cylinder 192 cubic inch 4.13 inch pistons ."

what part of this:

"No.

Blocks are not the same."


did u not consider an answer to your question?

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popshoods

02-11-2019 10:28:02




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 Re: Big Bore Ford Jubilee in reply to HFJ, 02-11-2019 07:59:50  
So how are the blocks different ?



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popshoods

02-11-2019 08:04:24




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 Re: Big Bore Ford Jubilee in reply to HFJ, 02-11-2019 07:59:50  
How are they not the same ?



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popshoods

02-11-2019 06:24:29




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 Re: Big Bore Ford Jubilee in reply to popshoods, 02-11-2019 05:41:19  
The question was NOT about swapping out a Complete engine / block . The question was about using the ORIGINAL 134 Jubilee engine block and boring it out to receive the 4 Cylinder 192 cubic inch 4.13 inch pistons .



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Ultradog MN

02-11-2019 07:03:21




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 Re: Big Bore Ford Jubilee in reply to popshoods, 02-11-2019 06:24:29  
I believe if you bore a 134 out to a 172 or larger you'll be into the water jacket.
And...
Beware the pinion support.



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popshoods

02-11-2019 08:02:38




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 Re: Big Bore Ford Jubilee in reply to Ultradog MN, 02-11-2019 07:03:21  
How do you improve the Pinion Shaft support ?



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Dean

02-11-2019 09:48:57




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 Re: Big Bore Ford Jubilee in reply to popshoods, 02-11-2019 08:02:38  
With enough money and/or time, many things are possible, but many things are not practical.

The easiest way to strengthen the rear axle assembly is to swap it out for a 6/8** rear axle assembly while you are swapping the engine.

Dean



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Ultradog MN

02-11-2019 08:19:11




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 Re: Big Bore Ford Jubilee in reply to popshoods, 02-11-2019 08:02:38  

The NAA Jubes were an interim model - between the Ns and Hundreds.
Ford beefed the later models up back there.
On the 800s with the 172 they used a larger differential and heavier rear end housing.
They also did away with the splined axle and hub which was a carry over from the Ns.
And...
They used the same basic rear end from 1955 through 1964 so used parts are more readily available.
The NAAs were only built in 53&54 so not as many of those parts around.
Hundred Series also had heavier transmissions, built to take 45 hp.
We're not here to tell you what to do do.
We just try to give people the facts and let them decide

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soundguy

02-11-2019 08:07:21




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 Re: Big Bore Ford Jubilee in reply to popshoods, 02-11-2019 08:02:38  
use a better rear end designed for the power. The jube rear end ain't much more than a N's



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Dean

02-11-2019 06:03:34




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 Re: Big Bore Ford Jubilee in reply to popshoods, 02-11-2019 05:41:19  
No.

Blocks are not the same.

Easiest way to increase power is to swap in a 172, but be aware of the pinion support.

Dean



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popshoods

02-11-2019 10:14:08




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 Re: Big Bore Ford Jubilee in reply to Dean, 02-11-2019 06:03:34  
You seem to know pretty much . What is the outside diameter of the stock 134 sleeves ; or what is the wall thickness of the stock bore 134 sleeves . I can do the rest of the math myself . This is my son Nick's friend's project , and they live in Nashville TN . Last picture is Nick's 941 5 speed with a 172 CID 62.6 HP engine .

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