Hey, What Kind of mufflers are you guys running? (Side questions, do the 80's elcaminos use 2 mufflers, or one muffler with dual outs?)

I've Got 2 1/2" Edelbrock RPMs with an X pipe on my 70 right now. I like the sound, but I don't know.. I used to have a straight "H" pipe and it sounded better...

Anyway, I'm interested to see what other folks have too!

I have a pair Flowmaster Delta Flow Series 50 Mufflers, with true 2 1/2 aluminum dual exhaust, with H-pipe. I like the sound of these at idle, but about 1500-2500 rpm, the interior resonance is intolerable. Flowmaster claims these as "Mild interior resonance" but I know better! I woundn't recommend these to anyone.

This is the best analysis of exhaust systems I've yet to find. Check it out...

http://www.boyleworks.com/ta400/psp/exhaust.html

on my 76 , I just got a pair of flowmaster 40 series delta flow with all new 2 1/2 inch pipe. i was getting a dual in dual out cat. converter, but it didnt fit because of ground clearance. so it ended up being 2 pipes going into a Y then into a single free flow cat. then a Y out into 2 pipes then to the mufflers. the 2 flowmasters are dumped with only a pipe several inches outa them. they sound pretty sweet but i get alot of interior bass sound pretty much all the time....
QUESTION: What does an H pipe do? flowmaster recommends them for their mufflers but i dont have an H pipe, i have 2 Y pipes tho...

QUESTION: What does an H pipe do? flowmaster recommends them for their mufflers but i dont have an H pipe, i have 2 Y pipes tho...

Basically H & X Pipes are used to syncronize the exhaust pulses. I don't know the exact science of it- but it has to do with balancing out the exaust pulses comimg from both sides of the engine- :idea: They decrease backpreassure and add more HP & Torque. They also have the side effect of quieting down the exhaus some- Especially with an X pipe- The X pipe also changes the sound quite a bit... Its arguable which is better X vs H, however it is agreed that they both are a 15-20hp boost over non balanced pipes

So in summary- H & X Pipes add some HP & Torque
8)

I just got a pair of flowmaster 40 series delta flow with all new 2 1/2 inch pipe.

Guitarstar,

Your 40's will create a whole bunch of low end noise. An H or X pipe will help with the low end noise. 50 Series are better for noise control, but you may not have the room for them. I have a Flowmaster dual in/out Delta 50 on my '97 Silverado that curbs the low end noise pretty well. My '67 Elky just has dual 32" glass packs with 1.5" pipe. The stock 283 does not need big exhaust to run well.

i have a flowmaster, but i don't know what its called. It goes 3'' from the connector, and then splits at the muffler into 2 1/2".

I like it cept my heat riser rattles sometimes, but that'll be fixed when i get some headers.

i have a temp. exhaust single side exit with a turbo muffler. Doesn't sound to bad, has somewhat of an aggressive tone to it when idling at 600, not the loud roar i want. But as of now, thats good, later im getting dual out the back.

Running true duals on my '87, did have Flowmasters, originally. Too much in the cab, so I switched to a set of turbo IIs. Got about 50% of the Flowmaster sound, but it sounds good with the duals, no cats, and a decent cam in my 350/330 crate motor.

I run a true dual exhaust. It consists of afterburner headers (Summit $135.00), 2.5 inch pipe to dual catalytic converters and dyno max turbo mufflers($450.00 exhaust shop). To get pipe clearance I used a MTS fabricated crossmember (online $195.00). It sounds great and on cold mornings it blows smoke rings!

I've run several systems on my car, and ironically, I'm going back to what I started with. I've had duals all the way out to the back bumper with generic turbos, cherry bombs that ended at the rear axle, Dynomax muflers on 3" pipe ended at the rear axle, and glasspacks that kicked out at the rear tire. This time around I'm going with cut-outs behind the headers for the strip, then 2.5" duals and 2 chamber Flowmasters through mandrel-bent pipes to the bumper, to keep down the interior noise.

64SS427

Hi guys,

I have headers (Elcheapo Flow tech) and a true dual exhaust and mild cam
(nice lumpy idle) am currently running flowmaster 2 chamber 40 series I believe. the louder the better I say, Inside and out. Changed the tailpipes from all the way back just past the bumper to just behind the rear wheels.
I would have really liked it just in front of the rear wheels with zoomies but I think I would have a ground clearnace problem and I haven't seen zoomies or lake pipes in eons. Haven't looked on the web yet to see if anybody makes them anymore.

Brian

Brian- Check out either Rod & Custom or Street Rodder if you're serious about wanting lakes pipes. These are still available, just can't think of manufacturers currently. Sanderson should be able to whip up a set of zoomies for you, but they are pretty spendy.

Devin

Thanks for the info devin.

Brian

what are zoomies and lake pipes... i figure i have to start asking these questions in order to learn more in a shorter period of time

Anyone see last Saturdays episode of "Trucks" on the Speed channel? This guy is doing a restoration on a 67 Chevy 1/2 ton pickup with the new 572 cubic inch big block, Anyway he's installed this awesome exhaust system on this thing, talk about lakers, he's got a set of exhaust cutouts that are controlled by a small electric motor that operates a gate valve which diverts the exhaust to mufflers (Edelbrock) or to straight pipes. Flip the switch and wham that 572 becomes a Fire Breathing Drag-on!!!

I'm running True Dual 2 1/4" Turbos out the back! It sound realy good but when I get my BB i'm going to go w/ Flowmaster 40 Series or 50 series! I think it should sound pretty SWEET!

Zoomies are like what a dragster would run, with the pipes basically coming straight out of the head, doing a curve toward the ground, then upswept towards the rear. Lakes pipes usually run the length between the front and rear tires, with the exhaust exiting near the rear tire. That's about the best description I can give.

ok so the lake pipe exhaust exits before the rear tires... if so.... i want that when i gt my el camino.... my friends dad's chevelle has those it looks sweet.

well, that's not all there is to it, lakes pipes are run on the outside of the body, and usually have a small diameter, 1 1/2 inch or so, whereas side pipes go in the same place, but are usually 3-4 inch diameter.

Iam running flowmaster dual 50s all 3" to the back with a pair of 3" stainless oval tail pipes 8) i had to get a special crossover www.crossmembers.com with the efi'd 383 and high lift roller cam,people here me coming :twisted: and that also serves as the radio too :lol:

I have floetech headers on 350 into 3" exhaust pipes with Xpipe back to
3" in/out flowmasterwith 2 1/2 tailpipes. the Xpipe improves low end and flow.

i have Dynomax...they are equivilant to the series 50 flowmaster...with turn downs right before the rear wheels. i also get quite a bit of interior noise..but i don't mind cause it sounds great on the outside of my stock 305.

I'm running 2.5" duals through 15-year-old generic bullet glasspacks. About like straight pipes with resonators :wink: . Exit is at the rear bumper, where they turn down and end behind the bumper about 2" below the line of the body in anticipation of the chrome tips I never quite got around to. (Safe enough on a truck, but you need a friendly inspector to get by since they don't stick out past the bumper. Looks good though.)

Doesn't make for a quiet interior, but then again that wasn't what I was after. It's not too bad though, kind of a nice low-end rumble. No real resonance problems that I've ever noticed except with change in the ashtray once or twice.

At the time I did it, I didn't have the $$ for headers, so it's more show than go (or is that sound than pound), but everyone who hears it assumes I've got a lot more than a relatively-vanilla 350. Works for me, until I gather the funds for the next, 'final' engine/drivetrain overhaul.

Here's a previous thread showing two different versions of sidepipes on an Elky: http://www.necoa.org/modules.php?name=Forums&file=viewtopic&t=478&highlight=sidepipe&sid=04abdd4c65765455afb37a758d5bb6d0

with a link to someone that sells them today.

I have Dynomax Cerma Coated shorty headers on the 76 going into the Flowmaster American Thunder system 2.5" Aluminized pipes with Flowmaster 30 series Mufflers and the "H" crossover that the AT system comes with.

On the 80 SS Elky, it is almost the same. Same AT Flowmaster system except 40 series mufflers and Cerma coated Dynomax normal length headers and hi flow dual cats.

On mine, the cat is the only muffler ('84, 305, stock manifolds and single cat)
As I drove home from getting my plates, the original muffler fell off. That open pipe sounded pretty cool. So I hod local indie muffler shop make up split pipes to the rear bumper, to provide a phony dual exhaust. But those long open pipes do have a nice low rumble. 8-)

I'm running glasspacks through 2" pipe. Have a set of Afterburner headers collecting dust that will be put on someday(after getting coated). Always liked the sound of glasspacks. 8)

well im going to have hooker headers on my stock 305, trying to determine muffler type...looked into real sidepipes, but glasspacks are just so loud, i dont wanna get a bunch of tickets(tho they dont typically ticket domestics around here)

anyone have any sound clips of a basically stock 305 so i can get an idea of what im gettin towards? i want a nice rumble, i was looking at the 50 series but someone said they are entirely too loud interrior noise, anyone have any sites with soundclips of various setups i'd appriciate it :)

i'd be running an H pipe as well, and a cat on each side for only afew more years

I am running 2-1/2" pipes from the headers back to Flowmaster series 40's. I do have an H-pipe. They are loud and at an idle sound like a boat exhaust. They sound wonderful especially next to those rice burners with their beer can exhaust. I have a 350 with a mild cam and heads, fun car to drive.

I added a 2 1/2 performance cat into a y pipe into 2 2 1/4 pipes with dynamax super turbos out the back on my 355. I like the low deep tone thats not to loud.

Im running dynomax ceramic headers with 2, 1/4 dynomax true duals made to work with the stock cross member. and turbo mufflers exiting below both the rear tail lights in the bumper. they sound pretty good.

im running 2 1/2 " all the way back through glass backs. i took off my cats. and put in cut offs. i can un-cap them to make it really loud but otherwise the duals sound real nice with my 305

I just had a set-up installed on my project 78 Camaro. 2 1/2" tube, H pipe & Dynomax Ultraflows all exiting at the rear qtrs. It's sounds better than any flowmaster system I've heard. Real smooth low tone throaty sound at idle, but breathes like a dragon in heat at WOT. Can't wait to take her to the track this fall.

I bought the true-dual Monte SS exit system from G-Force, running Summit Turbos, all 2.5". I modified my original crossmember to fit the driver side pipe.

Last time I did duals on my MCSS I bought into the Flowmaster hype...never again. Worst sound I've ever heard, but then I like the old Turbo muffler sound...quiet yet powerful sounding at idle. I don't want to hear anything at WOT except the howl of the carb.

The Elky has no mufflers...behind the stock cat, there's dual SS 396 resonators that dump at the axle. When the system gets replaced (soon I hope) it'll have headers, true duals and Walker Turbos. They will exit after the rear wheels with '76-'79 Trans Am dual chrome exhaust tips.

The headers are somewhere in Portland (delivered to the wrong city by the seller), but everything else is in the garage. We're going with mandrel bent 2.5" pipes.

I'm not so bothered about the sound of the FlowMaster set up, I have the American Thunder system, but that damn "H" pipe keeps braking apart I've had it re-welded several times and I have to have it done again. At present it sounds like I have open headers because of the damn "H" pipe. I'll try once more and then it goes.

Hello all you Elky nutz.

My '78 has flo-techs and dual 2 1/2 pipes (notched crossmember) with 2 chamber Flowmasters turned down infront of the axle as well. I did it myself and I love it. No clamps all welded. I am working on a ~450 horse 383 right now. I have a full manual TH400 with trans-brake ready to go in. Waiting on 12-bolt from a '72 Chevelle to arrive on my doorstep. Thats gonna be fun! Body looks great (sarcasm) and it should run like a raped ape (not sarcasm)! Once I get my wifes truck paid off I will get the body done. Does anyone else have clearance problems on the passenger A-arm with the flo-tech headers?

hvyweel

update:
I got the 383 in. Man that thing pulls hard. The exhaust is way to loud now though. I set off car alarms in parking lots.

hehe... i cut mine off at work a few months ago. sounds allright. im just begging the work on my car, so thats not important right now. gonna replace my 267 :( with a 350 :)

I'm runing headers and true duals on my 79. Flowtech headers,2 1/2"pipe
into Walker 70 chevelle big block muffs (2 1/2 " in 2 1/4"out)to bumper.
Sounds good, mellow but noticable at idle outside. Quiet melow inside.

Im running hooker long tube headers and flowmasters on my vette..they sound thunderous...I am planning on running hooker headers and flowmasters on my 81 400 block..although i am sort of looking for soomething a little bit quieter..anyone have any suggestions?

Yep, I use the good ole stock replacment muffler for my '77 elco. But when i'm at the the stop light with an import next to me reving what sounds like a 2 cycle lawnmower I just reach down and open the exhaust cut out to a staight pipe. It does not sound like much, but have you ever felt a car idle, not just hear the idle but feel it. FROM ANOTHER CAR... 8)

Im runnin true dual with 2 flowmaster 40 series mufflers. Im currently running them with Comp hooker headers. They sound pretty nice. Sounded louder before headers..but alot more torque with them on. Flowmaster is the way to go. thanx

I took out the manifolds and the single exhaust; replacing with Hooker Compitition headers,an x-pipe, Magnaflow Free Flow cats, and Flowmaster mufflers, all 2 1/2" and exits out the rear.

elcaminopower400,

G-force performance has some killer exhaust kits. The 3 in kit with 3 chamber flowmasters and montecarlo SS rear exit looks good to me. You should check it out. The three chamber flowmasters have a nice quiet tone.

www.crossmembers.com

hvywheel

right now i don't know what kind of mufflers mine has. i am going to redo the exhaust. i am going to use an x-pipe and use borla mufflers 2.5" in and 2.5" out. i would go with flowmaster but i think they are over rated plus i heard borla's on an ls1 w/stock manifolds and it sounded great.