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239 for 312 Engine swap
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239 for 312 Engine swap
Was advised to ask question here. I have a running 239 w/ 3spd overdrive out of a 55 effie and I want to put in a 57 wagon I recently purchased that has a worn out 312 and fordomatic.. How difficult would it be to swap in the 239 and leave the fordomatic and what would have to be changed? Money permitting I'll eventually put the 312 back in. Thanks for the replies.
Logistics Pro
Joined: Feb 2005
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From: Upper Left Coast
Howdy,
The 239 should bolt right up to the Fordomatic. I'm pretty sure you will have to use the starter and flexplate that is currently on the 312.
You can also go to http://www.y-blocksforever.com/forums/Forum3-1.aspx for a lot of info on this..
Cheers,
Rick
The 239 should bolt right up to the Fordomatic. I'm pretty sure you will have to use the starter and flexplate that is currently on the 312.
You can also go to http://www.y-blocksforever.com/forums/Forum3-1.aspx for a lot of info on this..
Cheers,
Rick
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239 for 312 engine swap
Brian
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From: Southern Oregon
FYI, it is looking good for the use of an Eagle SBC 6.250 rod, with an offset ground 312 crank rod journal allowing the use of a 2.1 in. journal on the Eagle rod. All while using a 312 piston moded to take an SBC piston pin. The guys at y-blocksforever have been helping me wade through the process. Result would be a 312 with stroke increased from 3.44 to 3.50, and the ability to achieve zero deck (top of piston even with deck) without removal of a large portion of the block deck. Plus the Eagle rod is new and stronger than the original, at a cost equal to that of rebuilding the originals. I will know later today if the plan is a go.
Best of luck. Keep us updated.
Laughing Gas
Joined: Feb 2003
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From: Bartlett, TN
I know I'm late coming into this conversation. I think that just for 54, the 239 was made in Dearborn and Cleveland. The 2 were not interchangable. I don't know if the bellhousing mounts would be that different, but I would check.
And yes the 239 is a dog. Just over 100 HP that weighs within 10# of a 460!
And yes the 239 is a dog. Just over 100 HP that weighs within 10# of a 460!
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crankshaft swap
Was advised to ask question here. I have a running 239 w/ 3spd overdrive out of a 55 effie and I want to put in a 57 wagon I recently purchased that has a worn out 312 and fordomatic.. How difficult would it be to swap in the 239 and leave the fordomatic and what would have to be changed? Money permitting I'll eventually put the 312 back in. Thanks for the replies.
(HELP!) Is there another crankshaft that I can use in a 312 block? I just got a 272 (not running). I really want to get this wagon back on the road
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From: Southern Oregon
The 312 crank in 272/292 will require use of the 312 rods. Stroking by offset grind will require a visit with John Mummert for combination of rods and pistons.
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The machine shop I took it to said its days of use are over..Whoever worked on the crankshaft before did not know what they were doing. I found one locally, but it has a small crack. It was sent off and ground down but the company neglected to fix the crack-when the guy (who also owns a machine shop) got it back he was angry. He said they were referred to as the "glass crank" back in the day. If he doesnt trust it I dont think I should either? Is there anybody who makes a 312 crankshaft still?
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He (the machinist) said thats what some of the people who raced the y blocks would call them. He has a 312 block himself. He was honest in telling me there was a crack somewhere on it. But it was weird how he wanted 150 bucks for something he wouldn't even consider using.
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From: m571.com/yblock
Generally speaking (there are always exceptions), I think it's good advice to avoid a blow hard when paying to have any sort of work requiring craftsmanship performed. Big mouths and careful, thoughtful work just don't seem to go together.
Regarding the Ford cranks, Ford was a pioneer in the use of cast cranks. They began casting cranks soon after the introduction of the flathead V8, meaning that by the time they got around to making the Y, they had 20 years of experience doing so.
Now, I don't know everything, but I have been to several county fairs, and Fords have never been known to have weak cranks -- quite the opposite! Cast cranks in all manner of Ford engines have proven to be quite durable in all sorts of uses, including racing in various forms.
Next time you talk to this guy, ask him if his source could also suggest a good source for metric muffler bearings.
Regarding the Ford cranks, Ford was a pioneer in the use of cast cranks. They began casting cranks soon after the introduction of the flathead V8, meaning that by the time they got around to making the Y, they had 20 years of experience doing so.
Now, I don't know everything, but I have been to several county fairs, and Fords have never been known to have weak cranks -- quite the opposite! Cast cranks in all manner of Ford engines have proven to be quite durable in all sorts of uses, including racing in various forms.
Next time you talk to this guy, ask him if his source could also suggest a good source for metric muffler bearings.
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