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Exhaust/Muffler Help

 
Old 04-06-2018, 01:13 PM
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twinpack
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Default Exhaust/Muffler Help

So I've been researching exhaust for my 1968, 327/350. Looking for advice on the mount for the mufflers. I want to use Dynomax Super Turbo mufflers but they and others usual suspects don't have the provision to connect to the factory muffler hanger at the exit point. What have others done to solve this? Or does anyone know if a company can provide a muffler with the welded attachment point? I see Corvette suppliers sell complete exhaust and I could buy just the mufflers. This would solve the hanger issue, but are these mufflers the same quality and how about the sound. I am trying to get a quitter, muscle car sound and no drone if possible. The car is for me and my wife to enjoy and not a racecar. don't want loud and raspy, just mellow throatiness. Please help.
Thanks
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Old 04-06-2018, 01:17 PM
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7T1vette
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Try Magnaflow mufflers. I think they make direct-fit replacements for the C3 cars. Nice mufflers and you can make them as 'mellow' or as 'raunchy' as you choose.
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Old 04-06-2018, 01:30 PM
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general ike
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If you really wanted to use those mufflers, you could use the setup the previous Owner setup on mine. Simple bracket mounted to the original mounting holes that come down in the form of a hook that engages a c clamp around the tail pipe of the muffler. Set up works fine. But not original. Let me know if you need a pic of it. Ike.

Last edited by general ike; 04-06-2018 at 01:31 PM.
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Old 04-06-2018, 01:34 PM
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Originally Posted by general ike View Post
If you really wanted to use those mufflers, you could use the setup the previous Owner setup on mine. Simple bracket mounted to the original mounting holes that come down in the form of a hook that engages a c clamp around the tail pipe of the muffler. Set up works fine. But not original. Let me know if you need a pic of it. Ike.
Please show pictures when you get a chance.
Thank you
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Old 04-06-2018, 01:38 PM
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I'm with 7T1 on this. I looked at a ton of mufflers, even tried chambered pipes, and landed on Magnaflow Turbos for my 79. They bolted right up, absolutely perfect. No tweaking, bending, adjusting, nada. Sound is very deep, reminds me of a 50 series FM, and nice at full throttle. Deep and tough enough to not be whimpy at all around town (engine is stock, no smog stuff, no cat - off road pipe), and they roar at full-throttle. Very happy with them, and a very good price point as well. I have gotten numerous compliments on the tone at shows/cruises, and I am sure your 68 mill will sound even better! I love that engine, had a 327 in a 68 Camaro.

Last edited by Jonz79; 04-06-2018 at 01:40 PM.
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Old 04-06-2018, 02:05 PM
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Originally Posted by Jonz79 View Post
I'm with 7T1 on this. I looked at a ton of mufflers, even tried chambered pipes, and landed on Magnaflow Turbos for my 79. They bolted right up, absolutely perfect. No tweaking, bending, adjusting, nada. Sound is very deep, reminds me of a 50 series FM, and nice at full throttle. Deep and tough enough to not be whimpy at all around town (engine is stock, no smog stuff, no cat - off road pipe), and they roar at full-throttle. Very happy with them, and a very good price point as well. I have gotten numerous compliments on the tone at shows/cruises, and I am sure your 68 mill will sound even better! I love that engine, had a 327 in a 68 Camaro.
Just received a call from the machine shop (RAD his shop is in Ludlow, MA) where I had the machine work done. I dropped the motor off yesterday after completing the rebuild, he just finished the dyno test and reported the little 327 had no leaks, 432 ft. lbs. torque and 383 HP. I will pick it up next week along with the dyno printout. I can give more detail information after that. But I am very happy my first engine build went so routine. I did convert to a full roller comp cam, pocket ported the heads and used roller rockers. Stay tuned.
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Old 04-06-2018, 03:42 PM
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Here you go, sorry not at the Vette right now so I had to go with what I had pic wise.






So the hanger has a bracket that screws into the frame, the original hanger position, that supports a rubber mount and then come down to a "hook", blocked by the tail pipe int the pic. That "hook" engages the c clamp that is bolted to the tail pipe.

All very neat and well supported. Not the original setup but very difficult to tell unless you really know what to look for and get down onto the ground to see. I think it works fine. Ike

Last edited by general ike; 04-06-2018 at 03:44 PM.
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Old 04-06-2018, 04:24 PM
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You can just weld the mount/hangar straight to the muffler or the pipe.



It ain't the prettiest way to do it but, it works.
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Old 04-06-2018, 04:25 PM
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Originally Posted by ajrothm View Post
You can just weld the mount/hangar straight to the muffler or the pipe.



It ain't the prettiest way to do it but, it works.
Actually it's not too bad. Thank you for the picture.
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Old 04-06-2018, 04:34 PM
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Originally Posted by twinpack View Post
Actually it's not too bad. Thank you for the picture.

It looked a lot better when the mufflers were new and the paint was fresh on them. You barely noticed the rods welded on them. This pic above is like 9 years later....muffers need a touch up paint job.
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Old 04-06-2018, 04:36 PM
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If I was to do it again, I'd route the rod along the top of the pipe/muffler so you wouldn't see it from the back... Basically make an L out of the hanger and weld the lower part of the L to the top of the muffler.
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Old 04-06-2018, 09:20 PM
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Even though your mufflers (and pipes) may be "new", I'd suggest that you wipe all outer surfaces down with lacquer thinner (or other solvent that leaves no residue), then shoot a couple of coats of VHT "Flat Aluminum" paint. With heat, the paint will cure even harder and keep those pipes & muffler looking great for many years. If you are going to weld stuff together, leave paint off of those areas and paint over them after assembly.

Last edited by 7T1vette; 04-06-2018 at 09:21 PM.
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Old 04-07-2018, 12:15 AM
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Originally Posted by 7T1vette View Post
Even though your mufflers (and pipes) may be "new", I'd suggest that you wipe all outer surfaces down with lacquer thinner (or other solvent that leaves no residue), then shoot a couple of coats of VHT "Flat Aluminum" paint. With heat, the paint will cure even harder and keep those pipes & muffler looking great for many years. If you are going to weld stuff together, leave paint off of those areas and paint over them after assembly.

Just the flat aluminum paint directly on the mufflers, no primer?
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Old 04-07-2018, 08:40 AM
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Originally Posted by 7T1vette View Post
Even though your mufflers (and pipes) may be "new", I'd suggest that you wipe all outer surfaces down with lacquer thinner (or other solvent that leaves no residue), then shoot a couple of coats of VHT "Flat Aluminum" paint. With heat, the paint will cure even harder and keep those pipes & muffler looking great for many years. If you are going to weld stuff together, leave paint off of those areas and paint over them after assembly.
Good advice. My plan is to use Hooker Compition Headers with the matching exhaust pipe setup. I will mock everything up and take apart than have headers and pipes ceramic coated inside and out. The mufflers and clamps wil also be coated for a uniformed appearance. I am doing it this way in a effort to lower engine bay temps as well as under car heat from radiating into the cabin. I will also take measures when I am at the body reassembly stage.

Last edited by twinpack; 04-07-2018 at 08:41 AM.
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Old 04-13-2018, 07:12 PM
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Originally Posted by Jonz79 View Post
I'm with 7T1 on this. I looked at a ton of mufflers, even tried chambered pipes, and landed on Magnaflow Turbos for my 79. They bolted right up, absolutely perfect. No tweaking, bending, adjusting, nada. Sound is very deep, reminds me of a 50 series FM, and nice at full throttle. Deep and tough enough to not be whimpy at all around town (engine is stock, no smog stuff, no cat - off road pipe), and they roar at full-throttle. Very happy with them, and a very good price point as well. I have gotten numerous compliments on the tone at shows/cruises, and I am sure your 68 mill will sound even better! I love that engine, had a 327 in a 68 Camaro.
Did you put true duals on or just replace the mufflers.
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Old 04-14-2018, 08:54 AM
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Duke94
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Originally Posted by 7T1vette View Post
Try Magnaflow mufflers. I think they make direct-fit replacements for the C3 cars. Nice mufflers and you can make them as 'mellow' or as 'raunchy' as you choose.
Did you buy these Magnaflow mufflers?

https://www.zip-corvette.com/78-82-2...-mufflers.html
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Old 04-14-2018, 09:44 AM
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twinpack
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Default Muffler choice

I settled on CC N-11 mufflers. It always a gamble because everyone has their own experience and opinion. I was looking for a not loud but rumble sound. After reviewing sevseveral comments I thought the N-11's fit my requirements best. All I can do now it wait and see if I made the right choice. I will report my experience.
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Old 04-14-2018, 09:47 AM
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Originally Posted by hotrodnick View Post
Did you put true duals on or just replace the mufflers.
True dual. I am hoping to have a drone issue. I am using CC N-111 mufflers.
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Old 04-14-2018, 01:41 PM
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Originally Posted by twinpack View Post
I am hoping to have a drone issue..
Really?
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Old 04-14-2018, 04:44 PM
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This is how I mounted my Dynomax Super Turbos.

Last edited by scura283; 04-14-2018 at 04:48 PM.
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