Muffler Blackout

[Robert E.]

While searching the Interweb for pictures of the fuel separator valve used on my '71 tank, I came across this advertisement for a '72 showing what looks like the factory applied muffler blackout.

Thought I'd post it for all to see.

1972corvette_05.jpg

Also, note no over spray on the bellhousing.

[Patrick H.]

Re: Muffler Blackout

Very interesting!

Also, Ontario Orange paint with blue seat - there's a unique color combination!

PS - the valve is reproduced:

http://www.parts123.com/parts123/yb.dll?parta~dyndetail~Z5Z5Z50000050g~Z5Z5Z522481~P50.00~~~~S3PS110GZP69871399858f~Z5Z5Z5~Z5Z5Z50000050G

[Mike E.]

Re: Muffler Blackout

Interesting, I just saw the 72 brochure The other day as I was going through things. Gotta be careful drawing conclusions from those, though. Airbrushed photos, NTFP, and more. Advertising, engineering, and assembly line weren't always on similar pages.

[Ron G.]

Re: Muffler Blackout

There was for sure black out on the under side of the mufflers. We, the 70-72 team have been talking about whether it was done at Walker or on the assembly line. We are certain that some cars had black over spray on the outer portions of the spare tire carrier. Either done on the assembly line because it went back to the heavy repair area to be touched up for cosmetic reasons. Again, we as a team need to do more research.

[Bob D.]

Re: Muffler Blackout

Patrick

I noticed that color combination also. Not sure that would be my cup of tea.

[Terry M.]

Re: Muffler Blackout

Interesting, I just saw the 72 brochure The other day as I was going through things. Gotta be careful drawing conclusions from those, though. Airbrushed photos, NTFP, and more. Advertising, engineering, and assembly line weren't always on similar pages.

Mike makes an excellent point.
I have a Jam Handy slide presentation showing preliminary information for the introduction of the 1970 Corvette & Camaro. These slides with accompanying audio on disk were used to educate dealer sales staff about the coming models.

Not only is the LS7 listed as an available option for the Corvette, but the Corvette front parking/turn signal lens is remarkably different than production.

One has to take the GM marketing material with a large grain of salt. It is not unlike the drawings in the AIM.

[Rob M.]

Re: Muffler Blackout

Patrick

I noticed that color combination also. Not sure that would be my cup of tea.

Who cares, it is orange (see Restorer article :-)

[Joe L.]

Re: Muffler Blackout

There was for sure black out on the under side of the mufflers. We, the 70-72 team have been talking about whether it was done at Walker or on the assembly line. We are certain that some cars had black over spray on the outer portions of the spare tire carrier. Either done on the assembly line because it went back to the heavy repair area to be touched up for cosmetic reasons. Again, we as a team need to do more research.

Ron-----


I can tell you one thing for sure: the 1969-72 2" SERVICE mufflers were supplied with the bottom and ends painted black. Once-upon-a-time I regularly purchased right side mufflers.

[James B.]

Re: Muffler Blackout

Ron-----


I can tell you one thing for sure: the 1969-72 2" SERVICE mufflers were supplied with the bottom and ends painted black. Once-upon-a-time I regularly purchased right side mufflers.

Joe:

The SERVICE mufflers that I had purchased from the GM dealer back in the early 80's for my '72 BB, were not supplied with black-out paint. You think perhaps they had discontinued the blackout paint by that time for the SERVICE mufflers or maybe the blackout paint was only performed for the SB applications?

[Bill L.]

Re: Muffler Blackout

Does someone have a picture of what the blackout looked like on a 70-72 sb?

Thanks,


Bill

[Joe L.]

Re: Muffler Blackout

Joe:

The SERVICE mufflers that I had purchased from the GM dealer back in the early 80's for my '72 BB, were not supplied with black-out paint. You think perhaps they had discontinued the blackout paint by that time for the SERVICE mufflers or maybe the blackout paint was only performed for the SB applications?

James------


All big blocks (except 1969) were equipped with 2-1/2" exhaust systems. The 2-1/2" SERVICE mufflers were generally not supplied with black-out pre-applied. However, I have many NOS 2-1/2" SERVICE mufflers [none for sale] and a few do have the black-out. In my previous post I was referring to 2" SERVICE mufflers. Everyone of those I ever bought or ever observed for 69-72 Corvettes had black-out pre-applied.

[Edward J.]

Re: Muffler Blackout

Does someone have a picture of what the blackout looked like on a 70-72 sb?

Thanks,


Bill

Bill I would just do as the Bob E. picture of the 70 at the top of the post. every car would not be the same anyway the bottom and rear of the mufflers were blacked out, I believe most judges are not really concerned , Lets face it unless you have the real exhuast system on the car its just a attempt to do as what it was thought to have looked. you'll get a different answer from every poster. the only way to really see how it was done is to see a car that been in storage for 45+ years with an untouched exhaust system, Chances are slim as I have seen some very low mileage 70/72 C3 bow tie cars. and none had the original black out. most had been touched up. or even part of the system has been replaced. If these cars had been run over the years the moisture rotted out the mufflers. I think that Paul O. had recently posted some pic. of a take off system- original if you want to look for them.

[Joe L.]

Re: Muffler Blackout

Bill I would just do as the Bob E. picture of the 70 at the top of the post. every car would not be the same anyway the bottom and rear of the mufflers were blacked out, I believe most judges are not really concerned , Lets face it unless you have the real exhuast system on the car its just a attempt to do as what it was thought to have looked. you'll get a different answer from every poster. the only way to really see how it was done is to see a car that been in storage for 45+ years with an untouch exhaust system chances are slim as I have seen some very low mileage 70/72 C3 bow tie cars. and none had the original black out. most had been touched up. or even part of the system has been replaced. If these cars had been run over the years the moisture rotted out the mufflers. I think that Paul O. had recently posted some pic. of a take off system- original if you want to look for them.

Edward------


I have the original left side 2" muffler from my 1969 which has the original black-out pretty much intact. However, it's very difficult for me to get at and I'm not going to risk personal injury to do it right now. If I ever do, I'll post a photo.

[Paul O.]

Re: Muffler Blackout

Here are some photos of the 69 2" muffler Left side. When I picked this up last year the entire pipe and muffler had silver paint on it. I was able to remove the silver paint while not removing what was left of the original black out.

[Bill L.]

Re: Muffler Blackout

Here are some photos of the 69 2" muffler Left side. When I picked this up last year the entire pipe and muffler had silver paint on it. I was able to remove the silver paint while not removing what was left of the original black out.

Perfect Paul. Thank you! Interesting to see paint on the hanger bracket too.

Bill