#1  
Old 07-10-2019, 03:12 PM
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Speargun Speargun is offline
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Default Casting 9799914 YS Block. RA3 or Not?

A local guy has a 9799914 YS block that he says is a RA3 engine.
I come up with:
1970 400cid 350HP YS Auto 10.0scr 067 cam 13 heads Block Casting 9799914

Wallace shows that this casting number is a 1970 block and the same casting was used for RA engines, but they were WS & YZ codes. I've also read that the RA3 blocks were all 4 bolt main vs 2 bolt on the non-RA blocks.
I haven't looked at the block yet so I can't verify any of the numbers or if it's 2 or 4 bolt.

So what's a core like this worth?
Block, crank, mains, 4X heads, & some misc parts....

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  #2  
Old 07-10-2019, 04:32 PM
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It is not a RA block.
It probably is drilled for 4 bolt caps but will probably have 2 bolt caps.


Technically the blocks are the same, but the internal parts are different along with heads.



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  #3  
Old 07-10-2019, 06:24 PM
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unruhjonny unruhjonny is offline
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it's a bread and butter 1970 400/4bbl/auto engine;

it holds no discernible premium over any other non-557 400 block - unless a person is wanting a 1970 block for their vehicle.

It seems like most everyone these days list all 1970 blocks as being "Ram Air III"... sheesh;
I have taken static for trying to politely tells someone precisely what they have.

I now try to always take this approach:
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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
  #4  
Old 07-11-2019, 09:17 PM
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"Technically the blocks are the same, but the internal parts are different along with heads."
Having owned both, I agree it is same block with the 3 middle Main bearing caps being 4 bolt.
This same "914" Block was also used to "make" a "915 block" ( RAIV) Engine plant ground off the "4" and stamped in a 5.
Same block casting used to make 3 engines. Not really a big deal for Pontiac since Block size was consistent.
I know a guy with a YS engine block for sale. He said the block was used by Pontiac to make ram air blocks, he never said that it is a ram air engine, anybody knows what a YS is. ( One I saw for sale recently)
A YS block will sell for what its worth. This is a non subject ..

  #5  
Old 07-12-2019, 11:16 AM
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So did all of the RA3 blocks (YZ & WS) come with 4 bolt mains?

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  #6  
Old 07-12-2019, 11:31 AM
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unruhjonny unruhjonny is offline
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Quote:
Originally Posted by Speargun View Post
So did all of the RA3 blocks (YZ & WS) come with 4 bolt mains?
my understanding is that for 1970, YES.

But(!)

There is always an exception to the rule - as such, I have understood SOME YZ engines were built with two bolt mains, but those are the exception, and far from the norm.

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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
  #7  
Old 07-12-2019, 07:08 PM
poncho-mike poncho-mike is offline
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I have never seen a true 1970 YZ or WS with 2-bolt mains.

I had a late 1969 YZ block with a 1969 VIN stamped into it, with only two motor mount holes, that was 4-bolt main. I was surprised but pleased to see the extra bolts.

I have seen 1970 WT blocks with 4-bolt mains (estimate about 1/4 in all my years) but most are 2-bolt mains. The earlier in the production year, the more likely it is to have 4-bolt mains.

Over the years, I've found a few 455s that shouldn't have been 4-bolt mains (with 4-bolt caps) but were. I'm not sure why, but it happened more in 1970.

Mike

  #8  
Old 07-25-2019, 03:22 PM
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unruhjonny unruhjonny is offline
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Quote:
Originally Posted by poncho-mike View Post
... I had a late 1969 YZ block with a 1969 VIN stamped into it, with only two motor mount holes, that was 4-bolt main. I was surprised but pleased to see the extra bolts.
neat!

Quote:
Originally Posted by poncho-mike View Post
... I have seen 1970 WT blocks with 4-bolt mains (estimate about 1/4 in all my years) but most are 2-bolt mains. The earlier in the production year, the more likely it is to have 4-bolt mains....
hmm, that's an interesting point - and would seem to better align with when GTO production started...
I have yet to pop off my 'WT' engine's oil pan;
I would be crying in my soup if it's a two bolt main, but it would sure be a nice perk if it was a four bolt main!
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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)

Last edited by unruhjonny; 07-25-2019 at 03:22 PM. Reason: fixed link
  #9  
Old 07-26-2019, 09:19 PM
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Speargun Speargun is offline
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So it ended up being a virgin YS 2 bolt block. He was under the impression that the ys was a RA engine.
I ended up getting it to add to the collection. Its definitely better than any of the 557 blocks I have laying around & should make a good stroker engine one day.

Thanks for all the input guys!

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  #10  
Old 11-11-2020, 02:52 AM
Oakland Speed Shop Oakland Speed Shop is offline
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Default Need help with locating a 1970 Pontiac 400 block...

Recently picked up an early (Van Nuys) Lucerne Blue 1970 T/A 4 spd. missing it's engine. Looking for a short block with casting 9799914 with a date code of A,B,C,D. If you have one, please let me know. While it won't be matching number, it would be nice to put the correct block in her. I realize a WS is correct for this T/A but I figured it might be near impossible to find one. Willing to pay for the right block. Preferably one that hasn't been rebuilt or had water down it.

  #11  
Old 11-11-2020, 11:07 AM
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unruhjonny unruhjonny is offline
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Quote:
Originally Posted by Oakland Speed Shop View Post
Recently picked up an early (Van Nuys) Lucerne Blue 1970 T/A 4 spd. missing it's engine. Looking for a short block with casting 9799914 with a date code of A,B,C,D. If you have one, please let me know. While it won't be matching number, it would be nice to put the correct block in her. I realize a WS is correct for this T/A but I figured it might be near impossible to find one. Willing to pay for the right block. Preferably one that hasn't been rebuilt or had water down it.
there's a 1970 WS on Facebook that was recently listed in a couple of my pontiac groups... let me see if I can find you some pictures...

__________________
1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
  #12  
Old 11-11-2020, 12:12 PM
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unruhjonny unruhjonny is offline
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@ Oakland Speed Shop

I am sending you a PM
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__________________
1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
  #13  
Old 11-12-2020, 11:09 PM
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muscle_collector muscle_collector is offline
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what are they asking for it

  #14  
Old 11-13-2020, 01:55 PM
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unruhjonny unruhjonny is offline
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Quote:
Originally Posted by muscle_collector View Post
what are they asking for it
here, I'll let this picture speak.

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__________________
1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
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