Not a stock crankshaft

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21 Centerdoor
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Not a stock crankshaft

Post by 21 Centerdoor » Wed Sep 18, 2024 1:11 pm

I recently, against my better judgement, purchased a pre/1919 engine that had been sitting outside for decades. I was hoping to at least get a spare hogshead out of it but no luck. I cracked it. Crankcase was packed full of dirt. Out of curiosity I hosed it out and pulled the #2 main cap off. The journal was decent 😳 I decided to press on. But I noticed something different about this crank. Counterweights? As you can see, the Rod journals so far are not as good. What am I eyeballing here and is it worth salvaging?[image][image][/image][/image]
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tman1913
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Re: Not a stock crankshaft

Post by tman1913 » Wed Sep 18, 2024 1:21 pm

Bolt on counterweights. An accessory that has mixed reviews.


speedytinc
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Re: Not a stock crankshaft

Post by speedytinc » Wed Sep 18, 2024 1:37 pm

Dunn counterweights.
They have to be installed/fit & balanced correctly.
I am currently running a set in one of my T's
The original counter weights seem to be a finer casting. Worth salvaging.

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Mark Gregush
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Re: Not a stock crankshaft

Post by Mark Gregush » Wed Sep 18, 2024 2:01 pm

I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1948 Ford F2 pickup


Kerry
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Re: Not a stock crankshaft

Post by Kerry » Wed Sep 18, 2024 6:22 pm

000_1218.JPG

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JTT3
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Re: Not a stock crankshaft

Post by JTT3 » Wed Sep 18, 2024 7:22 pm

Kerry that must be an Australia only accessory offset crank.
Did anyone get hurt? Looks like the block is trashed but did it destroy the hogshead too?.

Best John


Kerry
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Re: Not a stock crankshaft

Post by Kerry » Wed Sep 18, 2024 8:05 pm

Just the block was trashed, the re-build was a time bomb waiting to happen, done by someone who had no idea, the babbitt in it was lead as well.


Joe Bell
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Re: Not a stock crankshaft

Post by Joe Bell » Wed Sep 18, 2024 8:54 pm

I had one come in years ago that was done like that with the Dunn's weights on it, had been dynamic balanced from some one else, it had a vibration that was driving the owner nuts, I pulled it down had it rebalanced and vibration was still there, took the weights off and rebalanced it and it was gone? do not know if it would of had cast pistons in it might of been better? Just my two cents.

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JTT3
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Re: Not a stock crankshaft

Post by JTT3 » Wed Sep 18, 2024 9:06 pm

Just curious were Dunn counter weights just bolted on or were they also welded on the crank? I guess the next question is how would you balance that crank especially during the early days prior to dynamic balancing machines? Best John


Les Schubert
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Re: Not a stock crankshaft

Post by Les Schubert » Wed Sep 18, 2024 11:20 pm

I’ve been running the repro Dunn weights on my 27 roadster for about 40 years. They were designed for the diamond web crank and I fitted them to a EE. A couple days work!
But I’ve been very satisfied with my engine!

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AndreFordT
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Re: Not a stock crankshaft

Post by AndreFordT » Thu Sep 19, 2024 12:22 am

A few years ago I had this one.
It was balanced as well.

Andre
Belgium
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