Help! Quieter exhaust - Team Camaro Tech
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post #1 of 15 (permalink) Old Oct 10th, 04, 07:23 PM Thread Starter
 
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I just installed a dual exhaust in my 1969 convert. 383 with 700R4, hooker headers. Runs well but with the Flowmaster 40's, pretty loud when I get on it. The 50's were too long. Any suggestions on how to tone it down some without HP compromise. The neighborhood will thank you for any solutions.
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post #2 of 15 (permalink) Old Oct 10th, 04, 10:25 PM
 
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Got "X" or "H" pipe?
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post #3 of 15 (permalink) Old Oct 11th, 04, 04:47 AM
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We use Dynomax Ultra-Flow's on our road racer, very quiet and distinctive sound. I don't think you have to worry about power loss if you apply the proper physics to the rest of the system.

"For those that will fight for it...FREEDOM ...has a flavor the protected shall never know."
Semper Fi! L/Cpl Edwin L. "Tim" Craft, B Co 3rd AT's, Khe Sanh Combat Base, February, 1968
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post #4 of 15 (permalink) Old Oct 11th, 04, 05:42 AM Thread Starter
 
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gmranch, no H pipe yet. I will have that done shortly. I was told that will reduce the "hum" at specific speeds. I'll look into Dynomax thanks.
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post #5 of 15 (permalink) Old Oct 11th, 04, 06:53 AM
 
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It will also mellow the "rap". :&gt
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post #6 of 15 (permalink) Old Oct 11th, 04, 09:46 AM
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I would try the x pipe first. I think I had read it would quiet the sound down by 3 decibles or so. I have the 3"in/2.5" out Dr. Gas with magnaflows and the sound is wonderful.

Rick Dorion
69 RS Conv therapy program, Autogear M22, 8-pt cage, with a new 410! SOLD
New therapy program - 68 Coupe. Will be survivor exterior, modern underpinnings! SOLD
67 Belair with perfect floors, pinchwelds and firewall. Hmmm!
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post #7 of 15 (permalink) Old Oct 11th, 04, 10:30 AM
 
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I've heard the Magnaflows on a street/strip BB Nova. Very nice mellow rumble at idle, but you know it's more than a stock small block when he leans on it!

John
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post #8 of 15 (permalink) Old Oct 11th, 04, 12:50 PM
 
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SS Dave,

I see that you also live in Kansas. Do you ever get up to KC? If you do I would really like to take a look at your rod some time.

69 marina blue 307ci, RODchester 2 barrel, turbohydro, single track
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post #9 of 15 (permalink) Old Oct 11th, 04, 12:51 PM
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Dave
========================
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #10 of 15 (permalink) Old Oct 11th, 04, 04:42 PM
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Dude, that's just wrong...

Glad I'm not the only one who caught it.

Eric
69 'vert project big block/TKO 600 RR
68 'vert driver RS clone -- gone!
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post #11 of 15 (permalink) Old Oct 11th, 04, 06:45 PM Thread Starter
 
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Wow, you guys are out there, but since you mentioned it, thats definitely wrong. 1bad here is a virtual idea of my ro..car. 69 ss convertible, hugger,Z/28 stripes, with black interior and comfortweave seats. 383 700R4.Hotchkiss tractions front and rear IAS shocks, 373 posi with alum diff cover. Chrome ralleys with SS spiners, BFG T/A 235/60 all around. New gas tank and send unit. High rise intake with Demon carb Alum valve covers and custom alum radiator, MSD inig, quick ratio steer box and (my pride and joy) SS steer wheel. I just finished the groung up and am pleased with the project. Love to drive it! Will post pics of my ro...car. Chiefs season ticket holder.
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post #12 of 15 (permalink) Old Oct 12th, 04, 08:30 AM
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get an X pipe- it will mellow it down quite a bit.

you don't plan sincerity.
you have to make it up on the spot.

wanna hear about 20 years ago when i was too smart to know any better?
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post #13 of 15 (permalink) Old Oct 12th, 04, 01:03 PM
 
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ss dave,

It sounds like you really know your stuff about camaros. I have always wanted a 69 convert. Mines a hard top.

It is so cool that you are a Chiefs fan also. A very good friend of mine used to play for the Chiefs and I'm sure that you've heard of him (Nick Lowery) He's the nicest fellow you would ever want to meet. We always get together whenever he's in town.

I am really looking forward to seeing pix of your car.

69 marina blue 307ci, RODchester 2 barrel, turbohydro, single track
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post #14 of 15 (permalink) Old Oct 13th, 04, 07:45 AM
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Al
 
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Just remember that any type of crossover (X or H) will mean that you have to shim the X brace down a bit. Quieter mufflers might be an easier option.


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post #15 of 15 (permalink) Old Oct 15th, 04, 09:47 AM Thread Starter
 
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Shimmed the crossover already when I installed the 2 1/2" pipes. The H was placed just before the Xover. Sounds alot better. thanks for all the advice.
Dave
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