FlowTech Headers & Flowmaster Mufflers?
Thread Starter
Instructor
Joined: Aug 2002
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From: Naples FL
FlowTech Headers & Flowmaster Mufflers?
I was just about to purchase a set of ceramic coated FlowTech headers from Summit. I was looking to match them up with Flowmaster mufflers and doing a true dual exhaust. But after reading other threads about extreme noise in the interior.. I'm questioning this setup. I love the sound of the flowmasters (that throaty/tinny sound) on other cars. My brother has a 70 ss chevelle big 454 that sounds awesome! Would another muffler be better for my application?
1979 Black/Black T-Top, 350, 30 over, Melling (aggressive) cam, TH350, Performer alum intake, Q-Jet carb, stock heads.
Thanks,
Paul
1979 Black/Black T-Top, 350, 30 over, Melling (aggressive) cam, TH350, Performer alum intake, Q-Jet carb, stock heads.
Thanks,
Paul
Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
Depends on which Flowmasters you get. I have the Delta Flow 50s on mine and it is not bad at all. I am running an H pipe also. It will sound different than a Chevelle due to the pipes after the mufflers on the Chevelle.
Racer
Joined: May 2005
Posts: 336
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Originally Posted by smthnpls
I was just about to purchase a set of ceramic coated FlowTech headers from Summit. I was looking to match them up with Flowmaster mufflers and doing a true dual exhaust. But after reading other threads about extreme noise in the interior.. I'm questioning this setup. I love the sound of the flowmasters (that throaty/tinny sound) on other cars. My brother has a 70 ss chevelle big 454 that sounds awesome! Would another muffler be better for my application?
1979 Black/Black T-Top, 350, 30 over, Melling (aggressive) cam, TH350, Performer alum intake, Q-Jet carb, stock heads.
Thanks,
Paul
1979 Black/Black T-Top, 350, 30 over, Melling (aggressive) cam, TH350, Performer alum intake, Q-Jet carb, stock heads.
Thanks,
Paul
Thread Starter
Instructor
Joined: Aug 2002
Posts: 116
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From: Naples FL
Originally Posted by Gordonm
Depends on which Flowmasters you get. I have the Delta Flow 50s on mine and it is not bad at all. I am running an H pipe also. It will sound different than a Chevelle due to the pipes after the mufflers on the Chevelle.
I'm looking to doing an H pipe also. I will be having a muffler shop make the pipes, as I don't think there is a complete aftermarket header back system with an H.
Are the DeltaFlow 50's the quieter mufflers?
Thanks,
Paul
Intermediate
Joined: Jun 2005
Posts: 38
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I just had a new exhaust system installed in my 73 about 3 weeks ago. I had them install Magnaflow mufflers, and yes they are loud when you are accelerating, but once you are cruising it is fairly quiet in the interior of the car. I wanted to retain that muscle car sound.
Racer
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From: San Diego CA
St. Jude Donor '05-'07
I put a true dual with flowmaster 40's on my '78 stroker and it sounds great. I do wish I had gone to the super 40's, but it is loud enough as is. 
There is a little bit of sound reverb in the car at certain RPM, but I kind of like it...
There is a little bit of sound reverb in the car at certain RPM, but I kind of like it...
Thread Starter
Instructor
Joined: Aug 2002
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From: Naples FL
Originally Posted by 25th silverbullet
I put a true dual with flowmaster 40's on my '78 stroker and it sounds great. I do wish I had gone to the super 40's, but it is loud enough as is. There is a little bit of sound reverb in the car at certain RPM, but I kind of like it...
There is a little bit of sound reverb in the car at certain RPM, but I kind of like it...So..are the 40's or 50's louder? Also, Which headers do you have? I wish there was a way to hear all the different combinations...
Paul
Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
The 40s are louder than the 50s for sure. I have heard many 40s and they were a bit to loud for driving. They are calling every officer around. The 50s are quite loud at 6500 rpm but nice at cruising speed. I have had many compliments on my exhaust system. Some love the 40s and some love the 50s. Exhaust is a matter of personal taste.
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Pro
Joined: Sep 2004
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From: Minnesota
Originally Posted by JRS 73
I just had a new exhaust system installed in my 73 about 3 weeks ago. I had them install Magnaflow mufflers, and yes they are loud when you are accelerating, but once you are cruising it is fairly quiet in the interior of the car. I wanted to retain that muscle car sound.
Do you have an H pipe installed?
Melting Slicks
Joined: Aug 2004
Posts: 2,165
Likes: 950
From: Keizer Oregon
Originally Posted by smthnpls
I was just about to purchase a set of ceramic coated FlowTech headers from Summit. I was looking to match them up with Flowmaster mufflers and doing a true dual exhaust. But after reading other threads about extreme noise in the interior.. I'm questioning this setup. I love the sound of the flowmasters (that throaty/tinny sound) on other cars. My brother has a 70 ss chevelle big 454 that sounds awesome! Would another muffler be better for my application?
1979 Black/Black T-Top, 350, 30 over, Melling (aggressive) cam, TH350, Performer alum intake, Q-Jet carb, stock heads.
Thanks,
Paul
1979 Black/Black T-Top, 350, 30 over, Melling (aggressive) cam, TH350, Performer alum intake, Q-Jet carb, stock heads.
Thanks,
Paul
Flowtech ceramic coated headers
2 1/2" custom exhaust with no crossover
Flowmaster 40's
They are actually not as loud as I thought, not like glasspacks or anything, There is some resonance at low mid rpm cruise but my car is not a daily driver so I always enjoy it.
Here is a sound clip of the flowtech/40's with my 440hp 383 stroker:
http://home.comcast.net/~donjgraham/flowmastervette.wav
Intermediate
Joined: Jun 2005
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Originally Posted by captainmorgan
I am in the process on installing magnaflows on my '77.
Do you have an H pipe installed?
Do you have an H pipe installed?
Thread Starter
Instructor
Joined: Aug 2002
Posts: 116
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From: Naples FL
Originally Posted by oregonsharkman
That is my exact exhaust setup:
Flowtech ceramic coated headers
2 1/2" custom exhaust with no crossover
Flowmaster 40's
They are actually not as loud as I thought, not like glasspacks or anything, There is some resonance at low mid rpm cruise but my car is not a daily driver so I always enjoy it.
Here is a sound clip of the flowtech/40's with my 440hp 383 stroker:
http://home.comcast.net/~donjgraham/flowmastervette.wav
Flowtech ceramic coated headers
2 1/2" custom exhaust with no crossover
Flowmaster 40's
They are actually not as loud as I thought, not like glasspacks or anything, There is some resonance at low mid rpm cruise but my car is not a daily driver so I always enjoy it.
Here is a sound clip of the flowtech/40's with my 440hp 383 stroker:
http://home.comcast.net/~donjgraham/flowmastervette.wav
now I can't wait to do mine.........
thanks,
Paul
Le Mans Master
Joined: May 2003
Posts: 5,642
Likes: 1
The summit brand mufflers outflow the flowmasters but a significant amount. Flowmasters barely outflow oem. I have the data sheet around here somewhere if i can find I will post. oem is something like 285 cfm and summit is 325-45 I think. Dynomax bullets and borla xr-1s' were in the 2600 cfm range.
Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
Originally Posted by munday
The summit brand mufflers outflow the flowmasters but a significant amount. Flowmasters barely outflow oem. I have the data sheet around here somewhere if i can find I will post. oem is something like 285 cfm and summit is 325-45 I think. Dynomax bullets and borla xr-1s' were in the 2600 cfm range.
Thread Starter
Instructor
Joined: Aug 2002
Posts: 116
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From: Naples FL
I don't know how much difference I would notice between Summit and Flowmasters. I'm just changing from a stock exhaust to true duals with an "H". I think it will be substantial difference in performance no matter which ones i go with. I've always liked the sound of Flowmasters, thats why I asked about them on a vette.
Anyone out there use the Summit mufflers?
Cheers,
Paul
Anyone out there use the Summit mufflers?
Cheers,
Paul
