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152 stroker

2021 Arizona International Harvester Rendezvous

Edward Seaton 92

Farmall Cub
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May 30, 2021
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Been looking for thread about stroking a 152 ...can't seem to find one anyone have any ideas or knowledge about this I would like to do a stroker 152 and possibly video the process while doing it I know enough and have stoked 350 into 383's but only know that basic build app on IH 152s ...any help would be appreciated
 

Edward Seaton 92

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Was thinking of welding on material or last resort having a machine shop cut lobs and rod and pressing it together then drilling out oil paths but other than that I don't know what problems other than rocker arms ....
 

kingben01

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I might be wrong here, but isn't a 196 the same as a 152, but with a longer stroke??
 
Last edited:

Dana Strong

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I mat be wrong here, but isn't a 196 the same as a 152, but with a longer stroke??

My understanding is yes, and with a taller block to accommodate it.


Been looking for thread about stroking a 152 ...can't seem to find one anyone have any ideas or knowledge about this....

Was thinking of welding on material or last resort having a machine shop cut lobs and rod and pressing it together then drilling out oil paths...

Probably because most people have neither the time, the money nor the facilities to do it themselves, even if there were a good reason to want to.
FWIW, a friend (a retired engineer) has redesigned an antique 4-cylinder vehicle engine, adding forced lubrication, five main bearings (vs four), a stronger crank, roller bearings, better rods, and some other small internal changes I don't remember, all without changing the exterior of the block. Besides sectioning old (and pre-production) blocks to get/confirm dimensions, building the molds and cores for the initial run, etc., he ran a computer program, Finite Element Analysis, to determine where problems could occur; places where flexing can concentrate stresses in revolving crankshafts, for example. His new engine has gone into production and an early specimen has been fully machined, assembled, bench tested and then taken a car up a major peak and back in Colorado before being disassembled and fully inspected.
I'm not so sure your idea would give the same reliably good results.
 

Dana Strong

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My idea is to get at least some more power while keeping original engine
That answer doesn't address the points I made regarding cost and particularly reliability.

BTW, This forum, "Irma's Place", is supposed to be for discussions about appliances and other IH Non-Vehicle items. Then again, maybe it was appropriately chosen ......
 

Joe Hurley

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You can change the stroke of any crankshaft by offset grinding the rod journals to a smaller size. Obviously this will require a different rod.
 

kingben01

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I've been thinking of that just can't find the 196's any where within reason
A fair point. I had to buy one out of Salt Lake City, have it shipped to Oregon, then drive 600 kilometres from Canada to pick it up. It cost me a fortune in the end and I still have yet to install it.

But keep your eyes open. They do come up from time to time. With all the folks gutting their scout in favour of an LS swap, I have no doubt there will be more out there.
 

kingben01

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I understand that they're from different engines and measure up differently. I'm just suggesting instead of trying to re-invent the 152 for a few more ponies, and keep the original feel, why not try to source a 196 like the rest of us did. lol
 

mallen

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I might be wrong here, but isn't a 196 the same as a 152, but with a longer stroke??
A 152 is half a 304, while a 192 is half a 392. If you were going to do something like that, you'd be much better off starting with a 192. The things that have been done to a 192 translate over to a 192.

Typically, unless there are aftermarket parts available you get a longer stroke by offset grinding. With the IH engines that your only reasonable choice. Bore it a bit, offset grind it a bit.
 

Dana Strong

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You can change the stroke of any crankshaft by offset grinding the rod journals to a smaller size.

Let me know what's wrong with this math:

196/152 = ~1.29 so if the stroke is originally 6", to get the increased volume it will need to lengthen to 1.29 x 6" = ~7.7", an increase of 7.7 - 6 = 1.7". Won't that much offset grinding make the crankshaft have rather small rod journals?

Yes, to increase compression a bit this should work but for the reason cited here? What am I missing?
 
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