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ARE ALL sbc 010 BLOCKS HIGH NICKEL????

General engine tech -- Drag Racing to Circle Track

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BrazilianZ28Camaro
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Re: ARE ALL sbc 010 BLOCKS HIGH NICKEL????

Post by BrazilianZ28Camaro » Fri Jun 03, 2016 5:27 pm

GLHS60 wrote:
Around 1972 I was working in an automotive machine shop assembling Engines and the machinists often commented the 1968 and newer model year SBCs were "softer".

Especially the cylinder head guys who reamed the valve guides for what I think were 5000 series liners.

Anecdotal for sure but agrees with what you reported.

Thanks
Randy
I have a similar experience.

A few years ago I was milling a set of SBC 283 #896 powerpac heads to install rocker arm studs. Despite the fact both heads had the same casting number from 67-68 ( If my memory is right), one was harder to mill than the other.

That was a pretty noticeable difference by the tool cutting sound, for those who are used to mill.
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Re: ARE ALL sbc 010 BLOCKS HIGH NICKEL????

Post by dave brode » Mon Dec 02, 2019 9:43 am

Bob Hollinshead wrote:
Sat Feb 16, 2013 11:19 am
From Jenkin's book The Chevrolet Racing Engine: page 8, for racing use it is valuable to select a block that is "hard". There is some variation in the production casting material, and we often use a portable Brinell tester to find "hard" blocks. Page 6. The best factory block casting to obtain is part number 3970016. This case has the thick main webs and 4-bolt caps for added crankshaft support.
"3970016" That's the part # for an over the counter block that he felt was the best at the time.

Does anyone know if this block was used in production vehicles also? If so, do you know the casting number on this block?

Thanks.
Dave

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Re: ARE ALL sbc 010 BLOCKS HIGH NICKEL????

Post by PackardV8 » Mon Dec 02, 2019 12:39 pm

BrazilianZ28Camaro wrote:
Fri Jun 03, 2016 5:27 pm
A few years ago I was milling a set of SBC 283 #896 powerpac heads to install rocker arm studs. Despite the fact both heads had the same casting number from 67-68 ( If my memory is right), one was harder to mill than the other.

That was a pretty noticeable difference by the tool cutting sound, for those who are used to mill.
There aren't many porting iron heads these days, but they'll be able to confirm there are harder and softer areas in the same head casting. The cooling rate caused that. Thicker sections and interior sections don't cool as rapidly as thinner/exterior sections.
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Re: ARE ALL sbc 010 BLOCKS HIGH NICKEL????

Post by Mark O'Neal » Mon Dec 02, 2019 2:27 pm

And 50 years later.....the discussion is the same......

Next up...."are all 010 blocks 4 bolt mains?"...... :lol: :lol:

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Re: ARE ALL sbc 010 BLOCKS HIGH NICKEL????

Post by midnightbluS10 » Mon Dec 02, 2019 2:50 pm

High nickel blocks are a myth and always have been. Especially the 010 connection.
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Re: ARE ALL sbc 010 BLOCKS HIGH NICKEL????

Post by lance flake » Mon Dec 02, 2019 4:09 pm

Makes em easy to sell when somebody wants one though! Especially when they think with 4 bolt mains and came from a corvette makes it better!! lol

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Re: ARE ALL sbc 010 BLOCKS HIGH NICKEL????

Post by 77cruiser » Mon Dec 02, 2019 4:18 pm

Wish I would've gotten the Corvette block instead of the Dart. :)
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Re: ARE ALL sbc 010 BLOCKS HIGH NICKEL????

Post by BLOCKMAN » Mon Dec 02, 2019 8:33 pm

I sonic test every OEM GM block that goes through my shops and according the sonic velocity I don't see and difference in material make. Their usually high 1800's. The Chinese Dart look a like block I believe was around 1300 and PBM was calling those blocks High Density blocks, You can see where those went.

The 010 blocks have different webbing then the 010/020 blocks the 010/020 in most cases have the oil galley above the timing cover and the main webbing is better with those blocks.

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