Exhaust Tips (1970)

[Keith W.]

Any idea on how far out of the exhaust bevel the chrome exhaust tips should extend? Is it better to measure from the muffler?

[Don L.]

[Mark E.]

Re: Exhaust Tips (1970)

Don,

Would you share this? I researched this a few years ago while assembling my 1970, and didn't find any information in AIM regarding exhaust tip placement. Sheet 8 - A4 has arrows showing vertical clearance from the surround but with no dimension. And no measurements for horizontal placement shown. I may have a bad copy or missing pages.

[Terry M.]

Re: Exhaust Tips (1970)

Don,

Would you share this? I researched this a few years ago while assembling my 1970, and didn't find any information in AIM regarding exhaust tip placement. Sheet 8 - A4 has arrows showing vertical clearance from the surround but with no dimension. And no measurements for horizontal placement shown. I may have a bad copy or missing pages.

Like Don I don't have my AIM at hand, but I am not surprised at what Mark found. Original exhaust pipes had a hex shaped pad spot welded to the pipe after the mufflers and the original tips had a cut out that mated with the pad. These two parts dictated the location of the tip and its horizontal location as well. Thus, there was no dimensions called out. Replacement pipes and tips don't have either the pad or the cut out thus the tips can fave variable locations.

[Bill B.]

Re: Exhaust Tips (1970)

Here is the '70 AIM where view C depicts what Terry was saying. Unfortunately, no dimensions provided. In my limited experience, I have observed the '70 - '73 extensions configured in all possible distances from the bezel. I could not get a good consensus on a reasonable average from the cars I observed, as I too needed to set the distance on replacement mufflers and tips over the years. Even Chevrolet marketing pics from back in the day appeared to have wide variation!

20230309_172144.jpg

I eventually set mine to the approximate visual depiction shown on the 1972 Dealer Brochure (the fold-out spread that had the body lifted off the chassis) - The tips are shown on the body pic above the chassis. Here is that picture:

20230309_174708.jpg

[Don L.]

Re: Exhaust Tips (1970)

Hi all. Just catching up on this thread and after reading Terry's post, I must acknowledge that my rememberer is evidently broken. Exhaust pipe key and exhaust tip slot sets the depth. Doh! I knew that.

I will add that my '72 has Top Flighted 4 times (Chapter, Chapter, Regional and National) and each time, location of my reproduction Fortier tips passed judging without deduct or notation.

Seems what we need is for someone with a known-original car (with original exhaust system) to measure extension depth so we can all be in the know. Anyone?

Thanks.

[Keith M.]

Re: Exhaust Tips (1970)

To me the only correct dimension is what you think looks best!! For me I like the look of the photo Bill posted in the brochure. Very nuanced. I always felt these looked weird on any car if they stuck out too far which many people choose to do. Oh well.

[Ron G.]

Re: Exhaust Tips (1970)

Keith,

If you like I can send you some pics as I have an NOS 1970 exhaust tip.

- Ron

[Keith M.]

Re: Exhaust Tips (1970)

Keith,

If you like I can send you some pics as I have an NOS 1970 exhaust tip.

- Ron

sure!! please do

[Keith W.]

Re: Exhaust Tips (1970)

Hi all. Just catching up on this thread and after reading Terry's post, I must acknowledge that my rememberer is evidently broken. Exhaust pipe key and exhaust tip slot sets the depth. Doh! I knew that.

I will add that my '72 has Top Flighted 4 times (Chapter, Chapter, Regional and National) and each time, location of my reproduction Fortier tips passed judging without deduct or notation.

Seems what we need is for someone with a known-original car (with original exhaust system) to measure extension depth so we can all be in the know. Anyone?

Thanks.

Are there many cars that are 52 years old that still have the original exhaust system? I would love to see a picture along with a measurement from the back of the tip to the muffler.

[Patrick H.]

Re: Exhaust Tips (1970)

Here is one of a 301 mile 1972 ZR-1 that went through the judging process several years ago.
I note that the "back" (actually forward) flat surface of the tip matched the inner edge of the bezel on the valance.

[Keith W.]

Re: Exhaust Tips (1970)

Ron, can you please send to me as well? Thanks.

[Don L.]

Re: Exhaust Tips (1970)

Keith,

If you like I can send you some pics as I have an NOS 1970 exhaust tip.

- Ron

Why not post the pic(s) so we all can see/learn?

[Gary B.]

Re: Exhaust Tips (1970)

2023-03-12 14.20.48.jpgThis is the tab that Terry was referring to. It was spot welded to the muffler extension. This, in essence, positioned the tip automatically when it was slid on. Usually, they are not straight, are crooked, but back then who cared?
Gary B