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03-29-2019, 01:47 PM | #1 |
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8BA Rods in a '41 Merc Block
Hi all,
My '41 Merc block cleaned at .030. I have a set of 8BA rods that I would like to use with a 4" Merc crank. Does this sound like it will work? Thanks! |
03-29-2019, 02:43 PM | #2 |
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Re: 8BA Rods in a '41 Merc Block
That is the combo that works - go for it.
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03-29-2019, 04:15 PM | #3 |
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Re: 8BA Rods in a '41 Merc Block
Great! I didn't know if the extra stroke on the crank would cause the connecting rod studs to hit the case.
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03-29-2019, 05:59 PM | #4 |
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Re: 8BA Rods in a '41 Merc Block
The Merc pistons have the wrist pins higher in the piston to make up for the stroke. What pistons are you using??
The original pistons will not work |
03-29-2019, 06:43 PM | #5 |
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Re: 8BA Rods in a '41 Merc Block
I'm actually shopping for some .030 Merc. pistons. I have a set of Fords and like you say, they will not work.
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03-29-2019, 10:24 PM | #6 |
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Re: 8BA Rods in a '41 Merc Block
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03-31-2019, 04:28 AM | #7 |
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Re: 8BA Rods in a '41 Merc Block
Egge’s pistons for the 49-53 Mercury crankshafts are their L-991 which are 4 ring types.....these are what we stock under the Ford EAC-6108 part number. I’d have to check with Egge to see if they make them in a 3 ring version. The factory original pistons were 4 ring.
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03-31-2019, 12:11 PM | #8 |
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Re: 8BA Rods in a '41 Merc Block
I have Egge 3 ring pistons in my engine with a 4" stroke. I wish I had known about the metric rings when I built mine.
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03-31-2019, 05:04 PM | #9 |
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Re: 8BA Rods in a '41 Merc Block
I don't think the metric rings are available in the Egge 3 ring pistons, However they may be available in the 3 5/16 .020 and 030 pistons, FYI I've been using the Egge 3 ring pistons since the Late 80's in fact there is a pic of one in my book. (92)
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03-31-2019, 10:05 PM | #10 |
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Re: 8BA Rods in a '41 Merc Block
Great. I'll give Egge a call tomorrow. Is there a source for 99A head gaskets or should I just use a general 59A gasket?
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03-31-2019, 11:51 PM | #11 | |
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Re: 8BA Rods in a '41 Merc Block
Quote:
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04-01-2019, 08:08 AM | #12 |
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Re: 8BA Rods in a '41 Merc Block
I can confirm this. I left the bottom rings off the last engine I did and it runs just fine. I did, however, have the entire assembly balanced to account for the lighter piston assemblies.
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04-01-2019, 08:11 AM | #13 |
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Re: 8BA Rods in a '41 Merc Block
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05-06-2019, 07:45 PM | #14 |
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Re: 8BA Rods in a '41 Merc Block
So, I'm working on the Merc. crank and I need the plugs for the throws. They are 5/8's. Can anyone recommend a source?
Thanks! |
05-06-2019, 08:33 PM | #15 |
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Re: 8BA Rods in a '41 Merc Block
Check with Falcon Global for your gaskets they handle Best gaskets, They offer GraphTite and copper head gaskets . They may have the plugs too ,I drill and plug mine.
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05-06-2019, 08:58 PM | #16 |
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Re: 8BA Rods in a '41 Merc Block
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05-07-2019, 08:46 AM | #17 |
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Re: 8BA Rods in a '41 Merc Block
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