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"Full Circle 36hp Weber Crankshaft
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Mr. Okrasa Premium Member
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PostPosted: Sun Aug 11, 2019 10:48 pm    Post subject: "Full Circle 36hp Weber Crankshaft Reply with quote

I recently picked up this full circle 36hp Weber crankshaft. Unusual that it only has 4 dowels instead of eight
which suggests it's only a 64mm stroke??? The journals are all STD. @ 50mm and use a 36hp rod.

Click on this link below for photos:

https://www.instagram.com/p/B1DWn3xJJVQ/
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Alstrup
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PostPosted: Wed Aug 14, 2019 9:53 am    Post subject: Re: "Full Circle 36hp Weber Crankshaft Reply with quote

Looks like a VERY OLD Scat crank.
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gimmesomeshelter
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PostPosted: Wed Aug 14, 2019 10:15 am    Post subject: Re: "Full Circle 36hp Weber Crankshaft Reply with quote

Mr. O'

What's your plan for the crankshaft?

Cheers,

Paul
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motofly196
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PostPosted: Wed Aug 14, 2019 12:52 pm    Post subject: Re: "Full Circle 36hp Weber Crankshaft Reply with quote

Wasn't that listed on Samba for some crazy low price...think it was $250 or $350. It went fast...
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Mr. Okrasa Premium Member
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PostPosted: Wed Aug 14, 2019 10:06 pm    Post subject: Re: "Full Circle 36hp Weber Crankshaft Reply with quote

gimmesomeshelter wrote:
Mr. O'

What's your plan for the crankshaft?

Cheers,

Paul

Don't know. I purchased it more out of curiosity than function / use. I see that it's stamped: 3.000" which I'm assuming is the stroke? If that's the case, the stroke comes out to be: 76.2mm which is possible since someone mentioned earlier that it looks like an old SCAT crankshaft. Interesting that I once opened up a 36hp longblock built buy SCAT way back in the late 80's that had a (SCAT stamped) 76.2mm Porsche 356 crankshaft that had it's 53mm rod journals off-set ground to 50mm to give it that extra 2.2mm and used "clearenced" 36hp rods instead of Porsche 356. BTW: Because of the severe working angle of the conn. rod with that stroke and stock rod, 1 rod was severely bent! Rolling Eyes
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See my Instagram: https://www.instagram.com/okrasa/

1959 VW Karmann Ghia Coupe / Bamboo-Green / Denzel 1300cc / OG. owner, paint Wink
See this link: https://vimeo.com/139432553

VW www.Okrasa.com
356 www.PreA356.com
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Mr. Okrasa Premium Member
Original Old Speed


Joined: May 20, 2000
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Location: Eastside, Costa Mesa. So. Califas....
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PostPosted: Wed Aug 14, 2019 10:35 pm    Post subject: Re: "Full Circle 36hp Weber Crankshaft Reply with quote

motofly196 wrote:
Wasn't that listed on Samba for some crazy low price...think it was $250 or $350. It went fast...

When I saw the listing, I noticed that I was the 1st. person that had viewed it! It had "make offer" so I made an offer of $250 and he accepted.
It looked familiar and thought "that's a WEBER crankshaft". I had to go back and search and found some photos in the gallery.
Here are some photos. The first photo shows the crankshaft with a lightened flywheel. The second photo shows some other parts.
I purchased the Denzel heads with intake manifolds and original full flow oil filter set-up.
The crankshaft is currently at my crank grinder being magnafluxed to be sure it ain't broken.

Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.

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See my Instagram: https://www.instagram.com/okrasa/

1959 VW Karmann Ghia Coupe / Bamboo-Green / Denzel 1300cc / OG. owner, paint Wink
See this link: https://vimeo.com/139432553

VW www.Okrasa.com
356 www.PreA356.com
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volksheime
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PostPosted: Thu Aug 15, 2019 11:40 am    Post subject: Re: "Full Circle 36hp Weber Crankshaft Reply with quote

Quote:
BTW: Because of the severe working angle of the conn. rod with that stroke and stock rod, 1 rod was severely bent!


The rod ratio of 130mm 36hp rod/ 74mm stroke is about 1.75
The rod ratio of 137mm 1600 rod/ 82mm storke is about 1.65

why would that rod ratio be so detrimental in a 36hp when a smaller ratio is commonly used in 1600 based 2L engines all the time without issue?
would the AA H beams solve the bent rod issue?
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