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91camaro_rs Member
Joined: 03 Dec 2008 Posts: 1712 Location: Fox Island, Wa
1991 Chevrolet Camaro RS
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Posted: Wed Feb 15, 2012 11:24 pm Post subject: custom exhaust |
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im about done with dumb 305's sounding more agressive than my 350...so in the very near future the flowmaster 80 is gonna have to retire...
so im going to either swap to a 40 series or do a custom GMMG style
also i have been told 3" pipe is too big and thats what i have
i like the way this sounds
http://www.youtube.com/watch?v=ctwrUYaPDMA _________________
'91 Camaro RS 5.7 TPI- 700r4- 3.27 posi- headers- chambered exhaust- |
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QwkTrip 11sec Club
Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Wed Feb 15, 2012 11:31 pm Post subject: |
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Really? I think that sounds awful. It has the characteristic giveaway sound of a weak V8 with low compression. But exhaust sound is personal preference more than anything so do what you like.
Larger exhaust will slow the exhaust velocity and have less "brap" noise and more thunderous roar. The thunderous roar is what shakes your chest and makes children run home to mommy. When I go to the track the cars that really grab my attention are the ones that howl with no hint of brap and pop.
Find a sound clip of Magnaflow and see what you think.
Last edited by QwkTrip on Wed Feb 15, 2012 11:36 pm; edited 1 time in total |
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aaron_sK Member
Joined: 23 Jan 2006 Posts: 8834 Location: Back in beautiful Tacompton
1987 Chevrolet Camaro IROC-Z
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Posted: Wed Feb 15, 2012 11:35 pm Post subject: |
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QwkTrip wrote: | Really? I think that sounds awful. It has the characteristic giveaway sound of a weak V8 with low compression. |
Sounds like an old straight-piped truck from the 70's to me. No snappiness to it at all But to each their own. I regret pausing Humble Pie to listen to it.
Last edited by aaron_sK on Wed Feb 15, 2012 11:35 pm; edited 1 time in total |
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91camaro_rs Member
Joined: 03 Dec 2008 Posts: 1712 Location: Fox Island, Wa
1991 Chevrolet Camaro RS
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QwkTrip 11sec Club
Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Wed Feb 15, 2012 11:38 pm Post subject: |
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Right now your car sounds better than that other guy. All you need to do is crank up the volume. |
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91camaro_rs Member
Joined: 03 Dec 2008 Posts: 1712 Location: Fox Island, Wa
1991 Chevrolet Camaro RS
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Posted: Wed Feb 15, 2012 11:44 pm Post subject: |
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how do i do that? thats the problem... _________________
'91 Camaro RS 5.7 TPI- 700r4- 3.27 posi- headers- chambered exhaust- |
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QwkTrip 11sec Club
Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Wed Feb 15, 2012 11:46 pm Post subject: |
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Hmm... I found some sound clips and I guess I'm not crazy about Magnaflow on TPI. Got pops and braps.
4" Magnaflow howls wicked smooth with LS engine. Not even close to same sound with TPI. |
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aaron_sK Member
Joined: 23 Jan 2006 Posts: 8834 Location: Back in beautiful Tacompton
1987 Chevrolet Camaro IROC-Z
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Posted: Wed Feb 15, 2012 11:48 pm Post subject: |
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91camaro_rs wrote: | how do i do that? thats the problem... |
Have you thought about making the car faster? Fast cars tend to sound pretty nice, and if they happen sound like ass don't worry about it, they'll be gone soon enough being fast and all. |
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QwkTrip 11sec Club
Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Wed Feb 15, 2012 11:50 pm Post subject: |
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Losing the catalytic converters will make it louder.
What exactly is the baseline here? What headers, cats, catback do you have? |
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Alphius Peanut
Joined: 05 Sep 2006 Posts: 2429 Location: Grand Mound
1984 Chevrolet Camaro Z/28
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Posted: Thu Feb 16, 2012 12:25 am Post subject: |
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QwkTrip wrote: | Hmm... I found some sound clips and I guess I'm not crazy about Magnaflow on TPI. Got pops and braps.
4" Magnaflow howls wicked smooth with LS engine. Not even close to same sound with TPI. |
Idle and rev videos never seem to accurately capture the sound of a WOT run with load. Any stockish TPI motor seems to sound similar to me, they sound kind of soft and flabby if you know what I mean... My brother's Trans Am has a stock roller LB9 motor with a carb on top and a knockoff flowmaster and it is loud but the sound is pretty boring and never really wakes up even under WOT.
I only have a rev video but when I tip in and run through the RPMs I get a righteous howl out of my Magnaflow. Aaron says it's too loud. Kind of similar to the LSx Magnaflow videos I'm finding but with less of a high-pitched whine on decel. I'm hoping the switch from 9.2ish compression to 10.5-11ish will make it even better shortly. I'll be sure to take some videos after the coming mods.
http://www.youtube.com/watch?v=vMrQzLC2I5g
EDIT: Almost forgot, my dad's '99 Z28 has a Magnaflow catback and it sounds pretty good too but it's still catted and stock manifolds so it's kind of quiet, especially compared to mine. _________________ 84 Camaro Z28 - LS1/T56
85 Silverado - Low and Slow |
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91camaro_rs Member
Joined: 03 Dec 2008 Posts: 1712 Location: Fox Island, Wa
1991 Chevrolet Camaro RS
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Posted: Thu Feb 16, 2012 12:57 am Post subject: |
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Flowtech shorty headers, 3 inch pipe, back to a flowmaster 80, no cat _________________
'91 Camaro RS 5.7 TPI- 700r4- 3.27 posi- headers- chambered exhaust- |
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jchaussee Member
Joined: 14 Nov 2010 Posts: 1318 Location: renton
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Posted: Thu Feb 16, 2012 10:27 am Post subject: |
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Wonder if its a TPI thing, cause mine sounds good revving and at idle, it pops though when winding down. And all I have is some leaky flowtech headers welded into the stock t pipe and stock all the way back with no cat and some knockoff brand muffler |
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Leejo2005 Member
Joined: 12 Jul 2009 Posts: 466 Location: Kennewick
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Posted: Thu Feb 16, 2012 11:17 am Post subject: |
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All I have is headers, and a magnaflow cat-back, without a cat. I think it sounds more aggressive than my big block truck with headers and glasspacks. It might be that the truck is 8.0:1 and the lil 305 is about 10.4:1. I'll nab a clip today If I can. I love it for WOT and idling around but it's pretty annoying cruising around. |
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fiveoformula Member
Joined: 08 Aug 2007 Posts: 1799 Location: OR
1988 Pontiac Formula
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Posted: Thu Feb 16, 2012 11:51 am Post subject: |
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I get complements on my exhaust all the time, I have hooker 2055's, hallow cat and a 3" magnaflow catback I got from Aaron. But I do have a cam too, so it's a little "Chuggetty, chuggetty" at idle, has an awesome rumble cruising at 1500RPM then it makes some noise wide open
Skylers TPI sounds really good with the SLP exhaust. Maybe he could post videos of our cars. _________________
'88 FORMULA |
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Twilightoptics Hardcore (12sec Club)
Joined: 13 Jan 2004 Posts: 9191 Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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Posted: Thu Feb 16, 2012 12:00 pm Post subject: |
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Single 3" is not too big. _________________ A redline a day keeps the carbon away! |
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91camaro_rs Member
Joined: 03 Dec 2008 Posts: 1712 Location: Fox Island, Wa
1991 Chevrolet Camaro RS
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Posted: Thu Feb 16, 2012 2:27 pm Post subject: |
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it could also be that im just never behind my car enough to notice how loud it really is, cause i definitely like how it sounds on the dyno
maybe i should just install a cam to get a more lopey sound, and more power
isnt there a limit to cams with TPI tho? without effing up the computer _________________
'91 Camaro RS 5.7 TPI- 700r4- 3.27 posi- headers- chambered exhaust- |
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Leejo2005 Member
Joined: 12 Jul 2009 Posts: 466 Location: Kennewick
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Posted: Thu Feb 16, 2012 2:45 pm Post subject: |
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I think the more lope-ey the cam the higher RPM they are best for. And RPM and TPI aren't usually paired together. |
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DBL_TKE Member
Joined: 28 Feb 2007 Posts: 1505 Location: Aloha, OR
1991 Chevrolet Camaro Z/28
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Posted: Thu Feb 16, 2012 4:24 pm Post subject: |
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Twilightoptics wrote: | Single 3" is not too big. |
...that's what she said _________________ Richmond 3.73 posi| 36/24 sway bars | SLP LM2 | Koni's | Ground Control 800/200 | Y2K wheels | Dyno Don headers & Y-pipe | airfoil | BBK underdrive pulleys | Raised strut mounts | Extended ball joints | LCARB'S
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DBL_TKE Member
Joined: 28 Feb 2007 Posts: 1505 Location: Aloha, OR
1991 Chevrolet Camaro Z/28
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Posted: Thu Feb 16, 2012 4:27 pm Post subject: |
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Here's a couple recent videos of my '91 Z28. It has a stock LB9 with a 3" Loudmouth 2 cat back. Stock manifolds, Y-pipe, and cats. I personally love how it sounds. It has a nice, deep and smooth tone, it's perfectly livable driving around town but still loud enough for people to hear you a block away. I still have yet to install my headers.
[IMG]http://i48.photobucket.com/albums/f216/Sk8erBoiX11/91%20Camaro%20Z28/cc729b09.mp4[/IMG]
http://i48.photobucket.com/albums/f216/Sk8erBoiX11/91%20Camaro%20Z28/cc729b09.mp4 _________________ Richmond 3.73 posi| 36/24 sway bars | SLP LM2 | Koni's | Ground Control 800/200 | Y2K wheels | Dyno Don headers & Y-pipe | airfoil | BBK underdrive pulleys | Raised strut mounts | Extended ball joints | LCARB'S
Last edited by DBL_TKE on Thu Feb 16, 2012 4:34 pm; edited 1 time in total |
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DBL_TKE Member
Joined: 28 Feb 2007 Posts: 1505 Location: Aloha, OR
1991 Chevrolet Camaro Z/28
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