Muffler recomendations?

[92646]

I just bought a 1969 SS350 Nova with the most perfectly done 2.5 dual exhaust system I have seen. The problem is at idle the sound from the mufflers resonates through out the interior and you can not hear anything else including the engine idle. I am not sure of the manufacture of the two mufflers but they are square with a diamond plate case. I usually run a Flowmaster crossover muffler with 2.5 exhaust and I wanted to try the Pypes crossover system in the future but I would hate to change over this complete exhaust system just because I need a different mufflers. Does anybody have any suggestions?

[PxTx]

I would love to see pics of this nice system. What do the tailpipes look like?

The Walker version of the Corvair Turbo muffler is a great, traditional sounding muffler for the Day 2 sound.

[VintageMusclecar]

An X or H pipe does wonders in eliminating exhaust drone, also quiets things down a bit.

[69 Post Sedan]

From my experience, Flowmaster is the king of drone. Magnaflow mufflers work/sound great without the drone.

Like Eric said, a H or X pipe will help greatly with less drone also.

Kurt

[Tommy]

I recently installed a pair of oval shaped Hooker turbo (maybe called super turbo, can't remember) and they do not drone at all. Excellent sound at idle and cruising speeds but really come alive under hard acceleration. Just about any muffler that isn't designed like flowmaster will sound good. flowmaster wasn't called a muffler 30 yrs ago in the first place.. they called it a power chamber. I've had friends make the same thing at home. Noise makers ... if your exhaust is done right and you use a real muffler you will hear the engine more clearly. Flowmaster sounds like a hotrod dump truck....

No crossover H or X for me either. I guess its good for a few horses but I like to hear left and right side.

Tommy <<GRAEMLIN_URL>>/3gears.gif

[92646]

Not sure if it has Flowmaster mufflers on it but it does have an X-pipe and the tail pipes end at the quarter panels where you do not see them.

[PxTx]

I would bet the mufflers are Spintech. I have no experience with them. With full tail pipes and the crossover, I would say your instincts on a muffler change is right. Any true turbo muffler would be better.

[1969l78]

Glad you got that car Mark!

[tjs44]

I had 2 chamber flomasters on my 421 Lemans and hated them.I put Hushpowers on it with a H pipe and was night and day diff.Can now listen to the radio with no problem.Just put them on my 69 455 firebird with a X pipe and they are a touch louder but still can listen to the radio.Going to pull the X and replace with a H.FWIW,Tom

[Jeff H]

Yeah, those look like Spintech mufflers. I'm surprised they have a drone, but I've never tried them. I actually ran the Summit turbo mufflers on my old 1970 L78 Camaro and you could talk to people in the car and it had the classic musclecar rumble and that was with a full 3&quot; dual exhaust.

[MosportGreen66]

I have 2.5 inch Walker Turbo mufflers on my Z and it sounds/performs great

[novadude]

As already stated, Walker Dynomax Super Turbos are a good choice. IMO, the classic turbo style sounds much better than the Pypes race-pro / Magnaflow / Ultra-flo straight-through mufflers that are all the rage these days.

[RPOLS3]

Ask Bruce (xplantdad) what they put on his nephew Tyler's 468 Chevelle - he posted a video this weekend and it sounded pretty good.

Jake

[69 Post Sedan]

Very well known advantages of having a H or X pipe is added hp and tq.

But, another nice thing about either of them is that you lose the crackle or rapping sound....like a cherry bomb muffler makes.

Kurt

[Lynn]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 69 Post Sedan</div><div class="ubbcode-body">From my experience, Flowmaster is the king of drone. Magnaflow mufflers work/sound great without the drone.

Like Eric said, a H or X pipe will help greatly with less drone also.

Kurt

</div></div>

Maybe so. I only have experience with one Flowmaster system; the one on my car. It has no drone. I am running headers, and it does have an integrated H pipe.

[Plowman]

Glad you got that car too. But without the &quot;X&quot; or &quot;H&quot; pipe, the exhaust fits tighter to the trans cross-member, it is just so much ease to work on the trans,cross-member,and the rest of that stuff remains. I can pull out the trans,on my car without the &quot;X&quot; or &quot;H&quot; pipe on it,with out touching the exhaust system. But a True Turbo Muffler would help. I have True Corvair Turbo's Mufflers on my car and love them. Have fun and good luck with your sbc.

[RPOLS3]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RPOLS3</div><div class="ubbcode-body">Ask Bruce (xplantdad) what they put on his nephew Tyler's 468 Chevelle - he posted a video this weekend and it sounded pretty good.

Jake </div></div>

Just looked at Bruce's post and he indicated he has the Pypes system.

Jake

[PxTx]

I agree that the Crossover pipes are kind of a PITA. I used to love dropping the exhaust on my Chevelle at the track and running the open headers. Pulled them off to the side and put 1 bolt back in the collector just to hung them up. I installed a Flomaster full system with an H-pipe and never dropped the exhaust since.

Now that I'm typing this, I realize how much I missed that feeling at the track. Here is what I plan on doing, and I think it would be a great option for this original situation where a muffler change is in order.

I've used these V-band clamps on turbo cars in the past. They are an excellent way to manage exhaust pipe, allowing for simple removal and re-installation without any leaks.

http://www.racingpartdepot.com/media/07/a20792912ee010c8a2f1b2_m.JPG

So I plan installing these on at least the front side of my mufflers so I can easily drop out the H-pipe system.

[Xplantdad]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RPOLS3</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RPOLS3</div><div class="ubbcode-body">Ask Bruce (xplantdad) what they put on his nephew Tyler's 468 Chevelle - he posted a video this weekend and it sounded pretty good.

Jake </div></div>

Just looked at Bruce's post and he indicated he has the Pypes system.

Jake </div></div>

Yep! You're correct <<GRAEMLIN_URL>>/smile.gif

[69 Post Sedan]

I purchased the 2-1/2&quot; stainless kit from Magnaflow with the X pipe. I've pulled my trans out multiple times. I unhook them at the collector. That lowers the exhaust far enough to get the trans out.

I should clarify that I had a 427 450hp (guessing) with Flowmasters on my Nova and it was horrible. I have a friend with the original Flowmasters (2-1/2&quot;) on his '78 Camaro with a GM 383 sbc and it sounds good. From my perspective, if you have decent power, a 3&quot; Flowmaster system will have drone.

Kurt

[Donnie]

different compression ratios will change the exhaust sound.

[Salvatore]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: MosportGreen66</div><div class="ubbcode-body">I have 2.5 inch Walker Turbo mufflers on my Z and it sounds/performs great</div></div>
Great choice!

[ss427copo]

I've been down the &quot;Flowmaster 40 Series&quot; road with the Camaro. Drone Kings IMO.
Now, I'm hooked up with a full 3&quot; stainless system with an X-pipe and Dynomax Stainless mufflers. I love the sound, can hear the .680 lift cam and even a valve that needs to be adjusted. Plus, I don't need to scream for a co-pilot to hear me. They are loud when you need them to be. Thanks to Denny at Mufflex Performance Exhaust in Trenton, NJ.

[PxTx]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ss427copo</div><div class="ubbcode-body">... Thanks to Denny at Mufflex Performance Exhaust in Trenton, NJ. </div></div>

X2...Probably one of the best shops on the east coast IMHO. Had work done my old turbo Audi and they nailed it! I've have random people bring groups of friends by my car at the Carlisle Euro show (the only show I bring it to) just to look and listen to the exhaust! Its very flattering when someone does it as well as Mufflex and people notice!

[the427king]

COPO OFROAD SYSTEM.

[Dicky]

That's <span style="font-size: 20pt"><span style="color: #FF0000">PRECIOUS</span>.... </span><<GRAEMLIN_URL>>/haha.gif <<GRAEMLIN_URL>>/haha.gif <<GRAEMLIN_URL>>/haha.gif

Dicky <<GRAEMLIN_URL>>/flag.gif <<GRAEMLIN_URL>>/haha.gif

[m22mike]

A couple of little wheels and those could double as &quot;Wheelie Bars&quot; <<GRAEMLIN_URL>>/no.gif

[earntaz]

Whiskey Tango Foxtrot ...

[MosportGreen66]

I have some other videos... unfortunately FB kills the quality. I'll see if another host will be support HD Video better. The sound is much better out of the camera.

https://www.facebook.com/photo.php?v=10100215286226713&amp;l=582325914654320618 6

[ss427copo]

I found this....
http://i141.photobucket.com/albums/r59/nhra1060sc/th_100_4048.jpg (http://i141.photobucket.com/albums/r59/nhra1060sc/100_4048.mp4)

[Mk IV Muscle]

Another Flowmaster hater here. &quot;Turbo&quot; style mufflers are better all around IMO. Magnaflow, Dynomax, etc.

[Steve Shauger]

I really like the fit of the Flowmaster American Thunder system. I also like the exterior sound and in fact changed the mufflers to the slim line 50 series to attenuate the resonance/drone inside the car. Its better but not to my satisfaction. I may switch out the mufflers to those mentioned above. BTW I get comments all the time how awesome the car sounds from the outside. Again even with 50 series its still annoying on the inside. My fix is to turn up the volume on the factory 8 track and take in the hi fidelity sounds of the 8track and drown out the drone <<GRAEMLIN_URL>>/smile.gif.

[ss427copo]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: paceme</div><div class="ubbcode-body"> Again even with 50 series its still annoying on the inside. My fix is to turn up the volume on the factory 8 track and take in the hi fidelity sounds of the 8track and drown out the drone <<GRAEMLIN_URL>>/smile.gif. </div></div>

Steve,
I tried the same, but those damn Norwood Assembly Line folks decided not to put a radio in the Yellow Car! (snik-snik)
Jeff

[kwhizz]

http://i13.photobucket.com/albums/a251/kwhizz/Power%20Tour%2008/DSC09360.jpg

[Xplantdad]

One of the better ones! <<GRAEMLIN_URL>>/haha.gif <<GRAEMLIN_URL>>/haha.gif <<GRAEMLIN_URL>>/haha.gif

['69Novajoe]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 92646</div><div class="ubbcode-body">I just bought a 1969 SS350 Nova with the most perfectly done 2.5 dual exhaust system I have seen. The problem is at idle the sound from the mufflers resonates through out the interior and you can not hear anything else including the engine idle. I am not sure of the manufacture of the two mufflers but they are square with a diamond plate case. I usually run a Flowmaster crossover muffler with 2.5 exhaust and I wanted to try the Pypes crossover system in the future but I would hate to change over this complete exhaust system just because I need a different mufflers. Does anybody have any suggestions?
</div></div>
<span style="color: #FF0000"><span style="font-weight: bold">Wait, you got another Nova??!! Where have I been? Guess I haven't seen you in awhile Mark. Hopefully we can get our cars together sometime soon. Have you ever been in my car? I've got the Flowmaster crossflow you referred to but I've got an x-pipe that makes it sound really different. I don't think it's too loud but, then again, I'm deaf!! Take care and let's do the Donut Shop or Cars &amp; Coffee.</span></span>

[Steve Shauger]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: paceme</div><div class="ubbcode-body">I really like the fit of the Flowmaster American Thunder system. I also like the exterior sound and in fact changed the mufflers to the slim line 50 series to attenuate the resonance/drone inside the car. Its better but not to my satisfaction. I may switch out the mufflers to those mentioned above. BTW I get comments all the time how awesome the car sounds from the outside. Again even with 50 series its still annoying on the inside. My fix is to turn up the volume on the factory 8 track and take in the hi fidelity sounds of the 8track and drown out the drone <<GRAEMLIN_URL>>/smile.gif. </div></div>

Well I took Sammy's recommendation and tossed the Flowmaster mufflers and replaced them with Dynomax Super Turbo's, and wow what a difference. No drone, sounds healthy at idle and come alive when you get on it. Just a pleasure to drive now...

[earntaz]

X pipe with Corvair Turbo mufflers Walker #21348 and run tail pipes ... bitchin' sound ... TAZ

[ban617]

The 3 chamber Flowmasters are quite ...

[69hurstSC]

I have a set of Pypes Race Pro's going on my 69 Road Runner this weekend. I'll have feedback on their sound.

[Mr70]

Gardner Exhaust makes a &quot;turbo&quot; muffler that sounds incredibly good as well keeps the stock factory appearance.
When you buy their exhaust system,you get the stock mufflers,or opt for the turbos @ no extra cost.
They sound even sweeter under a solid lifter engine.