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Old 11-19-2023, 12:14 AM
chiefbigb chiefbigb is offline
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Default 1956 Pontiac dual quad engine information needed

I'm asking for information on this engine for a friend of mine. He has found what he believes to be a old nascar engine and is hoping to get some more information to decode it. All I know at this point is it's a 56 dual quad engine.

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Old 11-19-2023, 12:30 AM
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Here's a link with some info on that engine:

https://pontiacsafari.com/L1EarlyV8P...uad/index.html

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Old 11-19-2023, 12:54 AM
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Rick Gonser is a tech advisor for POCI.You should be able to get his number from the Smoke Signal monthly mag.tom

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Old 11-19-2023, 07:30 AM
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Just the air cleaner assembly for that motor is worth a small fortune if it’s still present.!

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Old 11-19-2023, 08:11 AM
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Thank you. I will attempt to contact Rick. Will post pics if he sends any

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Old 11-19-2023, 08:12 AM
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I saw one when I was very young. Wow! I thought. I think that is where that 524886 camshaft originated.

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Old 11-19-2023, 09:02 AM
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Hmmmm, wonder if the 1956 Salt Falts Pontiac Engrg 24 hour lifetest video (about 15-20minutes) is the Ab Jenkins 24 hour run.

Is on CD, and willing to know best way, place to upload it.

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Old 11-19-2023, 12:06 PM
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Few pics
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Old 11-19-2023, 12:08 PM
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Heads are not the original 2 4 castings from what I can tell.

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Old 11-19-2023, 12:54 PM
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Block number looks correct
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Old 11-19-2023, 03:01 PM
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Those are the correct head casting numbers according to the info I have.

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Two pairs of brown leather flip flops, never seen more then 2 mph.

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Old 11-19-2023, 04:07 PM
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Wallace racing showed 522845 as the 2 4 heads. From what little I know the ones he has have a bigger combustion chamber and need cut .071 to get the same compression ratio. Other than that both heads are the same

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Old 11-19-2023, 06:22 PM
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Thanks for sharing. Looks like some hd cast iron around the mains.

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Old 11-19-2023, 10:06 PM
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Looks quite solid in the lifter bore area!

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Old 11-20-2023, 07:50 AM
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Cam should be 522869,sorry. Other nos. Block#, manual trans 'S', auto 'H'. Head cast for all 56 V 8 522010. I do not have specific chamber volumes. From my listings intake,#523554. Distributor # 1110875. Carb # 7009820. Good luck. Nice find.

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Old 11-20-2023, 10:00 AM
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2-blot block was good enough for early nascar huh. Wonder what rods were successful.

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Old 11-20-2023, 10:11 AM
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Here's screenshots from Craftsman Service News on the 285 HP engine:
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Old 11-20-2023, 06:54 PM
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Thanks John and everyone else for the information. Very helpful

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Old 11-21-2023, 01:41 AM
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Interesting specs John. Ignition timing surely wasn't "aggressive"- no more than 30 degrees @ 4,000 RPM!

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