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12-30-2022, 03:51 PM | #1 |
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Are file fit rings available for 59A +.080
The bore is fresh and about .003-.004 oversize. This is an old build that was assembled and never fired. I am trying to reassemble it with the parts it came with. The end gap on the new rings is .020 and it should be .014. I haven't been able to find oversize rings to file to the correct gap. Thanks. Joel
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12-30-2022, 05:49 PM | #2 |
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Re: Are file fit rings available for 59A +.080
Joel file to fit rings might be available from Total seal if anything is available from them depends on the ring width. Another very good source for rings is Egge machine in California they offer cast custom sized pistons including the rings for the custom sizes. Anything like this would be a custom order so no one will have anything in stock.
The ring gap size needed based off the plus .080 oversize is actually .01470 this rounded the gap you need is actually .015 That fresh bore but never run is obviously the wrong size your measurements show that if the bore was actually correct the ring gap would have been perfect. Ronnieroadster
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I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH |
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12-30-2022, 09:03 PM | #3 |
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Re: Are file fit rings available for 59A +.080
Not ideal , but I think your end gap will be acceptable.
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12-30-2022, 10:16 PM | #4 |
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Re: Are file fit rings available for 59A +.080
I know that the bore is oversize by .003 and that is why the gap is off. I'll try Egge first. Thanks.
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12-30-2022, 10:30 PM | #5 |
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Re: Are file fit rings available for 59A +.080
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12-30-2022, 10:38 PM | #6 |
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Re: Are file fit rings available for 59A +.080
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Ronnieroadster
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I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH |
12-31-2022, 12:37 AM | #7 |
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Re: Are file fit rings available for 59A +.080
Sounds like that block was bored for .0825 pistons, They were a replacement for the "tin can sleeves" back in the day.
Bill |
12-31-2022, 11:48 AM | #8 | |
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Re: Are file fit rings available for 59A +.080
Quote:
Another thing to note is that your pistons are probably undersize for your current bore. This will give you more "piston rock/slap" and will reduce ring life. But, if you're just trying to get it running as best as possible, finding some new rings isn't a bad idea (if possible) - as it will reduce the potential blow-by. |
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01-01-2023, 02:14 PM | #9 |
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Re: Are file fit rings available for 59A +.080
That's what is keeping me from "slapping it together". I'll make a reasonable effort at finding either .080 oversize or the replacement rings for the tin sleeve kit. I should have had the bore opened up to the next oversize or 3 5/16. Thanks @Bored&Stroked
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01-01-2023, 03:12 PM | #10 |
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Re: Are file fit rings available for 59A +.080
What is the actual gap between the pistons and the cylinder wall?
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01-04-2023, 06:33 PM | #11 |
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Re: Are file fit rings available for 59A +.080
bore is 3.271 inches and the piston is 3.268 inches diameter.
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01-04-2023, 06:55 PM | #12 |
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Re: Are file fit rings available for 59A +.080
3 thou piston to bore clearance sounds good to me, but I only have limited experience. I'd be tempted to just put it all together and get 'er going. From the numbers you are quoting the ring gaps are about .006" more than recommended. That shouldn't be a show stopper. Try and hold your fingers 6 thou apart to visualise how much bigger the gaps are than recommended. It's hard to do.
If the gaps were sixty thou, you might have cause to be worried. Mart. |
01-05-2023, 01:40 PM | #13 |
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Re: Are file fit rings available for 59A +.080
It appears to me that this was originally 3 3/16 engine - so all the posts related to tin-can sleeves and .0825 pistons don't apply.
I'm not aware of tin-can sleeves in the larger 3 3/16 engines??? Anybody know differently? Also, a .080 bore would be 3.2675 . . . so it appears the bore is about .0035 over that. My guess is that you'd probably get away with .080 rings with a little bigger end-gap and you'll probably have a tough time finding .085 rings to file-fit exactly as you want. Question: Did you use a barrel mic to measure the piston or a dial caliper? Also, many pistons are "cam ground" and do not have the same/equal dimensions in all areas. |
01-05-2023, 07:52 PM | #14 | |
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Re: Are file fit rings available for 59A +.080
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01-06-2023, 12:12 AM | #15 | |
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Re: Are file fit rings available for 59A +.080
Quote:
My first engine about 70 years ago was a 41 merc with tin can sleeves, I pulled the sleeves and ordered .0825 pistons and then found a crack in the block. I got a 59L and bored it .0825 and used the pistons in it, Nice engine. Yes the tin can sleeves were used in both 3 & 1/16 and 3 & 3/16 engines. Bill |
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01-06-2023, 12:27 AM | #16 |
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Re: Are file fit rings available for 59A +.080
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01-06-2023, 12:47 PM | #17 | |
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Re: Are file fit rings available for 59A +.080
Quote:
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01-06-2023, 02:15 PM | #18 |
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Re: Are file fit rings available for 59A +.080
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01-06-2023, 09:53 PM | #19 |
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Re: Are file fit rings available for 59A +.080
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01-07-2023, 10:49 AM | #20 | |
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Re: Are file fit rings available for 59A +.080
Quote:
My guess is that Ford stopped doing this to probably save time and $$$ on new engines (which drove a lot of manufacturing changes). |
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