69 base model ncrs pics

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Jul 20, 2014 | 11:32 AM

#21

jyoconnell

Instructor

Joined: Jan 2005

Posts: 132

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Quote:

Originally Posted by rvzio

The shroud has 2 tabs on the bottom, there are 2 bracket that bolt to the tabs which in turn bolt to the cross member. Paragon catalog shows the 2 brackets.
R

Hey R, thanks for the info. I saw that picture in the Paragon book. Problem I have is that my crossmember does not have the attachment holses for the lower metal shroud brackets and I'm stumped about this unless my frame has been replaced.
John

Jul 20, 2014 | 11:57 AM

#22

Mike Ward

Race Director

Joined: Jul 2001

Posts: 15,892

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Quote:

Originally Posted by jyoconnell

My build date is P14, November 69. According to NCRS judging guide I shoud have an aluminum radiator and aluminum expansion tank. The radiator I have is a copper with a plastic shroud and no expansion tank. I was guessing that is was replaced after a collision, and I'm trying to restore to original. Anyone out there no what the correct configuration is?
thanks,
John

AFAIK, the only '69 L46 cars that had an aluminum rad with an expansion tank were manual transmission without A/C. All other configs had copper/brass units, no expansion tank.

Jul 20, 2014 | 01:54 PM

#23

LT-1 kid

Melting Slicks

Joined: Sep 2007

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From: cary Il

Quote:

Originally Posted by Mike Ward

AFAIK, the only '69 L46 cars that had an aluminum rad with an expansion tank were manual transmission without A/C. All other configs had copper/brass units, no expansion tank.

I dont think that is correct, I have had several 69 L46s and all had copper rad no expansion tanks with or without ac, L46 only had manuals only

Jul 20, 2014 | 03:45 PM

#24

LeMans Pete

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Joined: May 2006

Posts: 3,438

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From: Raleigh NC

St. Jude Donor '13-'14

Quote:

Originally Posted by Mike Ward

AFAIK, the only '69 L46 cars that had an aluminum rad with an expansion tank were manual transmission without A/C. All other configs had copper/brass units, no expansion tank.

Quote:

Originally Posted by LT-1 kid

I dont think that is correct, I have had several 69 L46s and all had copper rad no expansion tanks with or without ac, L46 only had manuals only

Bizzoco lists only one L46 (S/N 701363) that did not have A/C that used an aluminum radiator w/ a surge tank. Right before, he states, "small blocks with 4 speed, 350 HP with no A/C were fitted with a copper radiator, plastic shroud... and no surge tank."

Clearly it is not cut and dry, and possibly an early engineering change eliminated the aluminum radiator from the L46 build.

Jul 20, 2014 | 10:15 PM

#25

LT-1 kid

Melting Slicks

Joined: Sep 2007

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From: cary Il

one car made one way does not proof anything, maybe the rad was changed at some point and Bizzoco missed it.

Jul 21, 2014 | 09:09 AM

#26

LeMans Pete

Melting Slicks

Joined: May 2006

Posts: 3,438

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From: Raleigh NC

St. Jude Donor '13-'14

Quote:

Originally Posted by LT-1 kid

one car made one way does not proof anything, maybe the rad was changed at some point and Bizzoco missed it.

You're right, Bizzoco could have made a mistake and was not able to discern that the car had replaced the factory copper radiator and installed an aluminum one in its place while adding to it a factory overflow tank w/ correct RC-26 cap. Of course, the owner correctly installed the metal shroud as well.

But, I do tend to trust the man who literally wrote the book on the 1969 corvette. One car may not prove anything, but it opens the door to questions (such as a possible engineering change in early '69 to the L46 cooling configuration). It does, however, discount any statement that says "all L46s had copper radiators w/ no expansion tank."

I do not discount your knowledge w/ these cars, but please consider that the several cars you have seen/owned may not be a fair representative of all '69 L46s. Blanket statements in the corvette world tend to have many holes in them.

Last edited by LeMans Pete; Jul 21, 2014 at 09:12 AM.

Jul 21, 2014 | 10:43 AM

#27

SB64

Thread Starter

Safety Car

Joined: Jun 2013

Posts: 4,399

Likes: 793

pump

Quote:

Originally Posted by Vettebuyer5869

Yes look at my picture more closely, the bracket is towards the bottom and is brighter. The fuel lines on top and bottom also hold it in place.

Getting ready to put that very short piece of hose on the top of the fuel filter. I think in your one pic with the yellow circle that both fuel and vapor lines are even at the top. Was not sure if it was a lot higher
Thanks
Roger

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