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11-15-2020, 08:20 PM | #1 |
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KR Wilson Combination Machine Raising Block
Anyone know what purpose this serves? Have been using a combo machine without one.Seems fine.
S |
11-15-2020, 09:07 PM | #2 |
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Re: KR Wilson Combination Machine Raising Block
If it is what I think it is, would have been used when boring the cylinders, maybe not needed for doing the mains.
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11-15-2020, 09:09 PM | #3 |
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Re: KR Wilson Combination Machine Raising Block
You use it when boring cylinders, it raises the block up slightly to make the boring bar and drive bar line up properly
Last edited by 1930 coupe; 11-15-2020 at 09:35 PM. |
11-15-2020, 10:46 PM | #4 |
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Re: KR Wilson Combination Machine Raising Block
Ah, I see
Has anyone used the Wilson machine to bore cylinders? I have not yet tried that feature. As I look at the Model A engine specs. it seems critical that everything is to specification and in the correct location. |
11-16-2020, 12:21 AM | #5 |
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Re: KR Wilson Combination Machine Raising Block
I have, it bores from the bottom up and leaves a very rough finish. You have to bore it out about .005 th undersize then smooth and bring out to final size with a precision cylinder hone I use a Sunnen hone. It is very slow, but if you have patience and the proper tools you can get very good results.
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11-16-2020, 02:22 AM | #6 |
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Re: KR Wilson Combination Machine Raising Block
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All turned out great with new pistons expanded to match each bore, for correct clearance. I did it for fun to see if it would work. I started with 220 grit stones. Next time I will start with 150 and plateau with 320, and it might go quicker with less shoulder damage (to me not the bores!) SAJ in NZ |
11-16-2020, 05:34 AM | #7 |
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Re: KR Wilson Combination Machine Raising Block
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11-16-2020, 07:36 AM | #8 |
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Re: KR Wilson Combination Machine Raising Block
I have been using a Kwik Way bar but had often wondered about using the original KR setup.
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11-16-2020, 08:50 AM | #9 |
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Re: KR Wilson Combination Machine Raising Block
The Model A engine bore is, if memory serves me right, 1/8" off center from what the Model T bore was. The plate is to raise the block to make up the difference when boring the cylinders.
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11-16-2020, 05:12 PM | #10 |
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Re: KR Wilson Combination Machine Raising Block
Hello Bruce of MN,
I have a 1930's piston Koetheriser machine patented by Emil Koether. It squeezes the piston through the gudgeon bores into a more cammed shape, which is then set in by shot peening all around the gudgeon bossed inside the piston. There was a post showing one in a mobile truck by Old Car Mart on this forum a while ago. I expanded one piston 0.0095, another by 0.0055 and the other two by 0.004 inch. Engine now runs very quietly. Con rods were mismatched by 45 grams too. Evening-up both ends of all 4 rods by weight also made a big difference. Again not on a Model A, but a 2.5 litre English Riley. SAJ in NZ |
11-16-2020, 05:38 PM | #11 | |
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Re: KR Wilson Combination Machine Raising Block
Very interesting!
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