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#1503563 Sun Jun 04 2023 02:45 PM
Joined: Sep 2011
Posts: 2,845
L
Lugnutz Offline OP
'Bolter
These clamps are really nice for areas where you might want to disconnect the exhaust in pieces. Stainless and well made.
Since my exhaust system has an X-pipe, I would need to remove ALL of the exhaust as a single piece. Placing these between the engine and X-pipe really helps.

Attached Images
1387CE03-3A2A-468F-9F55-98BB562F47D7.jpeg (161.54 KB, 247 downloads)
Joined: Dec 2020
Posts: 755
G
'Bolter
They do work well. As long as the pipe is straight where you have it
disconnected. When I replaced my old Smithy exhaust with a Smithy ,forward it was straight.
Going back it had a bend almost in the wrong spot. It was tricky getting
it seal. Very small leak at one end. To be safe ,I used high temp red silicone.

Good job. Looks nice.


BD

1958 3100 Apache Step side 1/2 ton 327 engine
1958 3100 Apache Panel 1/2 ton 235 engine
1959 3100 Apache Panel 1/2 ton 327 engine
In Project Journals
Joined: Oct 2005
Posts: 4,038
"Hey! I sound like Darth Vader!!
Another alternative with better sealing, would be a V-band clamp. Reusable, however, they do need to be welded in.

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modela334.jpg (60.52 KB, 230 downloads)
Joined: Jun 2011
Posts: 4,977
E
'Bolter
Those SS clamps are common on big trucks, they come in straight sizes and stepped up!

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Joined: Feb 2023
Posts: 100
R
RLB Offline
'Bolter
Thanks Lugnutz How 'bout a photo of your x pipe install, if it's not too much trouble.


1966 C-10 Short Stepside
HiPo
Step-by-step ~ and on-going resto build
in the Project Journals
Joined: Sep 2011
Posts: 2,845
L
Lugnutz Offline OP
'Bolter
Originally Posted by RLB
Thanks Lugnutz How 'bout a photo of your x pipe install, if it's not too much trouble.

Explanation time. I have an engine noise. Pretty sure I have a good ear. It sounds like an exhaust leak.
So my brain goes into diagnostic mode!
Manifold to downpipe donut gasket looked fine. Good seal. No change.
Next, I welded up all the nested pipes to seal up any small leaks. To do that most efficiently without taking ALL the exhaust pipe out, I cut pipe and used the pictured sleeve connection pictured in this thread.
No change.
Could the noise actually be caused by the X-pipe? Hmmm.
So I took the X pipe off (it had to come off for final welding anyway) and drove the truck with only straight pipe coming back from the manifolds. It was so loud that I really couldn’t hear the noise very well, but I could tell the noise wasn’t gone.
Next, I installed my glass packs with more straight pipe, but with the X pipe eliminated. I had to convince myself that the noise was not caused by the X pipe. No change.

Now we come to the personal preference decision. My preference versus what the neighbors like. The X-pipe was a very quiet exhaust system. No hot rod sound at all. Hardly a rumble, even with glasspacks. X-pipe video [youtu.be]

I really like the growl with just glasspacks and no X-pipe. The noise is still there though. Next I’ll check valve lash and then I’m stumped because I checked the engine to manifold yesterday and didn’t find a leak at the engine. Factory GM ram horn cast iron manifolds. Noise is not present at idle (at least I can’t hear it) and is most noticeable at acceleration. Spark plugs are tan like wheat bread.

Pics show my X-pipe fab. The exhaust tubing is mandrel bent mild steel kit from Amazon (NOT stainless like I said previously). I’ll never tackle something like making my own exhaust again. Too much fiddle factor and took me forever and a week.

I still plan to use the connection sleeves but will wait until I finalize the exhaust. Currently it’s mocked up to exit just in front of the rear tires while I do diagnostic work.

Attached Images
18C37F4F-74B7-4302-96C0-30EEECF6F569.jpeg (188.59 KB, 165 downloads)
75F7A675-43DC-4B8A-B32A-27B253B531B9.jpeg (173.97 KB, 164 downloads)
87CC3469-96FA-47C4-8B04-83C9237B9488.jpeg (198.59 KB, 162 downloads)
F36D1D58-BD65-4828-AD20-A1CC8315E058.jpeg (350.95 KB, 162 downloads)
Last edited by Lugnutz; Mon Jun 12 2023 11:22 AM.
Joined: Oct 2021
Posts: 3,187
O
'Bolter
Stainless steel exhaust is usually louder and "tinnier" sounding than galvanized steel and aluminized steel. Maybe its transferring internal engine noise? Stuck lifter? mild lifter tick magnified by exhaust?


1939 Packard Standard Eight Coupe (The Phantom)
1950 Chevrolet 3100 (Ol' Roy)
1956 Cadillac Coupe de Ville (The Bismarck)
1956 Cadillac Sixty Special Fleetwood (The Godfather)
1966 Oldsmobile Toronado (The Purple Knif)
1966 Ford Mustang (Little Red)
1964 Ford Galaxie 500 coupe
1979 Ford F-100
1976 Ford F-150 (Big Red)
1995 Ford F-150 (Newt)
Joined: Sep 2011
Posts: 2,845
L
Lugnutz Offline OP
'Bolter
Originally Posted by Otto Skorzeny
Stainless steel exhaust is usually louder and "tinnier" sounding than galvanized steel and aluminized steel.

My bad. I mis-remembered the details. The Amazon exhaust tubing kit is mild steel. I now remember that I doubted my ability to weld stainless so I bought mild steel and saved $10. Haha! I’ll edit the earlier post to say mild steel.

Joined: Feb 2023
Posts: 100
R
RLB Offline
'Bolter
Thanks for the photos. Not to worry re the SS vs mild steel. It’s hard to keep track of all that needed on these builds. I just brazed up a quicky dual exh on mine just for start up. Actually sounds pretty good using a pair of Advance Auto cheapie mufflers & mid 60’s Vette exh manifolds 2 1/2 “ thru out. But I’m still working on the permanent, finished product. That’s why I wanted to see your x pipe

Attached Images
IMG_1697.jpeg (217.85 KB, 133 downloads)

1966 C-10 Short Stepside
HiPo
Step-by-step ~ and on-going resto build
in the Project Journals
Joined: Oct 2021
Posts: 3,187
O
'Bolter
What's that perforated angle bar for?


1939 Packard Standard Eight Coupe (The Phantom)
1950 Chevrolet 3100 (Ol' Roy)
1956 Cadillac Coupe de Ville (The Bismarck)
1956 Cadillac Sixty Special Fleetwood (The Godfather)
1966 Oldsmobile Toronado (The Purple Knif)
1966 Ford Mustang (Little Red)
1964 Ford Galaxie 500 coupe
1979 Ford F-100
1976 Ford F-150 (Big Red)
1995 Ford F-150 (Newt)
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