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Topic: Anyone ever seen this?

in Forum: C3 Fuel, Emission Control, and Exhaust Systems

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Anyone ever seen this? (1/6)
6/17/09 10:01pm

manget1

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Indianapolis, IN - USA

Vette(s):
Silver 1974 Convertible - L82 4 speed Low miles (was only 8,900 when I bought it in March 2006) - Now 54K miles. Original owner bought it as an investment for son's college expenses. 2008 Jetstream Blue Convertible

Joined: 9/3/2006
Posts: 2418

I took my car in to get an exhaust leak fixed. They were going to do a simple cut and paste, but when they cut the piece off from the heat riser where the leak was, they found this

http://www.C3VR.com/member_uploads/9201_9300/9258/IMG_0128.JPG

They said the pipe had an inner and outer piece and it looked like the two had separated and the inner piece had almost completely blocked the exhaust.

Given this and the fact that we couldn't be sure from looking if the other pipes were the same way, they are going to cut away everything from the heat risers to the mufflers and replace it all.

I'm hoping for a major boost in HP when all is said and done!

But I'm curious if anyone has ever run across anything like this

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I wanted a Corvette my whole life, but I never dreamed of all the wonderful people I would meet because of it!

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target=_blank>Click for another pic!�� And yet another!

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Anyone ever seen this? (2/6)
6/17/09 10:02pm

manget1

The picture really doesn't do it justice. I would say the pipe was at least 60% blocked

______________

I wanted a Corvette my whole life, but I never dreamed of all the wonderful people I would meet because of it!

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target=_blank>Click for another pic!�� And yet another!

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Anyone ever seen this? (3/6)
6/17/09 11:07pm

Adams' Apple

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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20128

The pic ain't very good, is it? Hard to see it, but it does look collapsed right at the end there. Do you know if those are the original, factory pipes, or have they been replaced somewhere down the line?
The L82 engine should have had the 2 1/2" manifolds, AND 2 1/2" pipes all the way out. The pic looks like you have the 2 1/2" manifold, with a neck-down(on the pipe) to 2" about 8" from the manifold, which is the way the L48 was....strange.

I have actually seen exhaust pipes separate and collapse like that...usually and indication of a couple of issues, one being late(retarded) ign timing, and Chinese pipes... Thumbs Down

Can't say I've ever seen it on factory stuff, tho, but it's totally possible.

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Joel Adams
C3VR Lifetime Member #56
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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Anyone ever seen this? (4/6)
6/18/09 12:38am

Norsky

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Burke, VT - USA

Vette(s):
SOLD - "The Toy" - '70 Convertible
SOLD - "The Beast" - '90 ZR-1 (#682)
SOLD - "Betty" - '28 Ford Model A Tudor
Still have - "BLKBRRD" - '78 Pontiac Trans Am

Joined: 1/23/2002
Posts: 7190

If you do have 2 1/2 inch manifolds spend the dollars to go with 2 1/2 inch pipes to the mufflers. You'll really like it...!!! Thumbs Up

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Jim Olson

"The Toys"...!!! Save the Wave!

Where I've been in a Corvette...!!!

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Anyone ever seen this? (5/6)
6/18/09 8:21am

Madrider
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Robersonville, NC - USA

Vette(s):
76 stingray

Joined: 4/23/2009
Posts: 47

Looks like you pipes have a tumor! Glad to hear they can surgically remove it! LOL

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Anyone ever seen this? (6/6)
6/19/09 1:34am

anips
Former Member
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sonoma, CA - USA

Vette(s):
72 LT-1 AC coupe,69 l-36 coupe

Joined: 8/9/2002
Posts: 784

I've never seen 21/2" sb chevy exh. manifolds, but I have seen 2" sb manifolds with necked down 21/2 head pipes, thats factory for my Lt-1 and replacement for my LT-1 that I got from Corvette Central. Confused

and my exh manifolds are numbers matching 72 LT-1 without A.I.R.anips2009-06-18 22:49:14

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