#221  
Old 11-22-2022, 04:30 PM
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This is an incredible story. Thanks for sharing it with us. Just curious about what intake manifold you plan to use.

  #222  
Old 11-23-2022, 12:15 AM
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Default Intake

Good Question.

This motor came with an intake manifold which is also pre production. I am just in the middle of going over everything and trying to document it all and than will put it up also. But here is a sneak peak.
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Old 11-23-2022, 01:05 AM
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Gotta ask. What became of the 455 SD shortblock I sent you from NY? Hope all is well with your family Mike.

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Old 11-23-2022, 03:51 AM
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Default SD Block

Hi Dave,
I still have it here also. Nice and safe. I wasn't looking but it was hard to look the other way on this piece due to all the early pre production gear my car would have been running.

I have alot of options to think about now.

I had a bit of a rough time with health a few years back but all is back to normal now and fighting fit.

Hope you guys are all well also.

Did your son ever get through his build in the Le Mans I think it was.

Michael

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Old 11-23-2022, 12:01 PM
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Glad youíre on the mend Mike. We still have both 68 convertibles and are just finishing up an interior resto on his. Of course I canít even find time to even drive mine as I am the family mechanic and painter lol. We just painted his 600 HP 2008 Civic SI (his first car he wonít part with it) and we brought back his 2008 M3 from South Carolina that he bought. Hereís pics of his cars. Be well.
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  #226  
Old 11-23-2022, 12:25 PM
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Quote:
Originally Posted by mscicluna007 View Post
Good Question.

This motor came with an intake manifold which is also pre production. I am just in the middle of going over everything and trying to document it all and than will put it up also. But here is a sneak peak.
Please post more pictures of the manifold when you can. By the looks of this picture this manifold is missing something that is unique to the SD-455 manifold.

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Old 11-23-2022, 03:14 PM
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Default INTAKE

I will do Paul.
It definitely does not have LS2 cast into it. There is a part number also at the rear of the carb pad. I will definitely be posting pics up of it.

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Old 11-28-2022, 03:12 PM
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Quote:
Originally Posted by PAUL K View Post
Please post more pictures of the manifold when you can. By the looks of this picture this manifold is missing something that is unique to the SD-455 manifold.
Hi Paul,

Here is the manifold 490471.

Its very different to how we expect to see it. LS2 is nowhere to be seen and part numbers ground off everywhere . I have tried not to miss any details on this motor so it has taken time to get photos and do some homework


Enjoy.

Michael Click image for larger version

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Old 11-28-2022, 03:23 PM
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The cylinder heads their was some holes that have been plugged .

One of Rocky's photo's from the press release showed these early developmental heads.

The stamping INSERT from what I understood from Rick was in testing they were burning out valves real bad. Louie Clemens modified the heads with an insert in the coolant area to divert coolant.

Rick arrived in 78 until around 84 so was able to learn from who was left at the Proving Grounds. This motor sat quietly in the back of the shed. Most stock was already movedon or scrapped. So I am really glad it survived.

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Old 11-28-2022, 03:27 PM
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Another interesting part is there is no 132 cast into the side of thebblock like production SD 455.

Instead this one sports 212. ThebBlock code sports 490132 at the rear of the block.Click image for larger version

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  #231  
Old 12-03-2022, 10:59 AM
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Quote:
Originally Posted by mscicluna007 View Post
Hi Paul,

Here is the manifold 490471.

Its very different to how we expect to see it. LS2 is nowhere to be seen and part numbers ground off everywhere . I have tried not to miss any details on this motor so it has taken time to get photos and do some homework


Enjoy.

Michael Attachment 602714Attachment 602715Attachment 602716Attachment 602717Attachment 602718

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Thank you! I will post some pictures and explain what I'm not seeing on your manifold that the production engines had.

Is that manifold off the engine? If so would you post a picture looking at the intake ports please?

I went through a Super Duty engine that was pieced together by the Pontiac Corporate Service Garage back in the day. They really liked using those hand stamps. It was fun trying to decipher what they all meant.

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Old 12-03-2022, 03:50 PM
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Hi Paul,

Sure no problems. Its still off the engine at the moment so I will get some photos for you.

Would be great to learn more.

Did tou want me to email them if there is too many pics.


Michael

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  #233  
Old 12-04-2022, 03:55 AM
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Hi Paul,

Let me know if you need more.

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  #234  
Old 12-04-2022, 03:56 AM
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Couple more of the intake ports.
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  #235  
Old 12-04-2022, 03:03 PM
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Thanks! It looks like that flange is taller so it will cover the taller ports (kinda obvious). What I noticed was the scallop at the top of the manifold ports that the production manifolds used is missing on yours. I'm guessing maybe after your manifold was designed they figured the valve cover was getting too close to the manifold and added the scallop for additional clearance.

Thanks again, what a great project! I'm glad that engine was saved and can't think of a better car for it to go in since the Grand Am didn't survive.
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  #236  
Old 12-10-2022, 08:18 AM
Baron Von Zeppelin Baron Von Zeppelin is offline
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Quote:
Originally Posted by mscicluna007 View Post
Yes it has a Partial Vin at the front of the block and i was able to get PHS on this Vehicle.
I will share the PHS and VIN.
Good Lord !
Hollywood can't even write stuff this good

... remember that time a guy over in Australia bought a run of the mill Y-Code 73 TA project , and decided to get the PHS Invoice just as a formality ? It was a pre-production SD magazine test car

... remember that time a guy over in Australia bought an Eng/Dev pre-production SD engine , and it had a VIN stamp . It came from the ultra-mysterious 1 of 1 SD Grand Am magazine test car

The dynamics have been astounding
More congrats to you Michael
The paper trails of Pontiac have been amazing and invaluable.

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