Best way to cut out the popping sound in exhaust

blue95 · 07-14-2002, 08:28 PM

I added a flowmaster awhile ago with a stock cat and 2.5 and have a really raspy sound in the high rpms and a popping sound whenever I let off the gas. I know that I could add a resonator back there but wouldn't that tone down my exhaust? What offer options do I have or should I go for a new cat or pipe?

blueirocz-28 · 07-15-2002, 04:19 PM

the popping noise from when you let off the gas is from backpressure. not sure how to fix it on 2 into 1 exhaust like on our v-6's but on true dual applications, you would add an x-pipe or h-pipe. maybe that will help i dunno.

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Tyler Parsons
'90 FZR 600
'85 IROC-Z
'94 Camaro 3.4L
'78 Blazer 350

FireChickenLS1 · 07-15-2002, 05:03 PM

before the muffler put a resonator(kinda a glasspack) in there right after the cat and it will delete all that annoying rasp that you are hearing

kingman109 · 07-15-2002, 07:02 PM

i hate that sound. Happens to me too... my best solution.
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Drop a v8 in her!

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94 3.4L Camaro

heres some temp pics:
My temp pics here

APPEARANCE MODS- Front and rear black outs; Rksport black stripe kit; 5 spoke rims off new firebirds; yellow hose kit for engine; yellow painted calipers; dual 4" chrome tips, autometer dual guage pods

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PERFORMANCE MODS- 8mm spark plug wires, 3' pipes from engine; High flow catalytic converter to 3 1/2" pipes to flowmaster muffler with dual 4x18" long chrome tips, K&N FIPK, 160 degree thermostat

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bowtieracer6 · 07-15-2002, 10:25 PM

Throw a little dynomax bullet muffler before the muffler, my buddy did and it didn't tone his exhaust down at all. Mine used to do it a lot, but I've had the muffler on for about a year and a half and now it doesnt do it as much. Personally I like the pop, I think it sorta sounds like a mustang with the resonator.

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'96 3.8 M5
Flowmaster 2.5" catback
SLP CAI
SLP takeoff LSD
Z28 driveshaft
clear corners
15.236@91.77
my car

MakaveliECS · 07-16-2002, 01:48 AM

get a wider Y pipe and a new Cat, throw on some good headers and you'll barely notice it anymore. Glasspacks are another option although people generally relate those to rednecks and old muscle cars, just don't tell anybody you have glasspacks, also most states wont pass you in inspection with them so be careful.

Shagaure · 07-16-2002, 03:03 AM

i Dual Monza tips with resonations on and that sound is deleted. The ones i put on my car are actually for a truck thy cost me like 43.00 a piece. You can go with the car ones but i dont know if it will sound the same way cause the truck ones are longer. THey cost cheaper at 25.00 a piece.

goaliejerry · 07-17-2002, 12:22 AM

I don't know why you guys don't like that sound, I love it! I think its cool as hell and makes the car sound powerful.

Zomie · 07-17-2002, 04:18 AM

I like the sound as well!

Scammper · 07-17-2002, 12:02 PM

I totally love the 'evil gurgle'!

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1995 Camaro 3.4 M5
Custom Cold/Ram Air
Flowmaster 80
MAC progressive springs 17x9 ZR-1 Replicas on the way...
and some cool electrical stuff, my 'camaro' lights up... check it out at:
http://scammper.fbody.com

fbird95 · 07-26-2002, 02:19 AM

When i take my foot off the gas, the backpressure is out of control.
How can you not love that sound? It turns heads as you roll by, unlike the generic sound of a mustang. The more poping the better.

muckz · 07-26-2002, 01:00 PM

1. Remove the muffler.
2. Remove the popcorn kernels from the muffler.
3. Reinstall the muffler.

Actually, this sound happens in V8s as well, especially with Borla. It has mostly to do with the muffler.

As someone suggested, you can increase the size of your Y-pipe, or simply get a different muffler.

viper98885 · 07-26-2002, 01:17 PM

Quote:

<font face="Verdana, Arial" size="2">Originally posted by muckz:
1. Remove the muffler.
2. Remove the popcorn kernels from the muffler.
3. Reinstall the muffler.

Actually, this sound happens in V8s as well, especially with Borla. It has mostly to do with the muffler.

As someone suggested, you can increase the size of your Y-pipe, or simply get a different muffler.</font>

I have headers with y-pipe, a 3" high flow cat and the SLP Loudmouth system and mine still does it. I don't think you will really be able to eliminate it.

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- Josh
If you have any questions or need installation pics/help, e-mail me: Viper98885@aol.com
'93 Camaro Hardtop
camaroz28.cardomain.com/id/viper98885

oil pan 4 · 07-28-2002, 04:50 PM

It will still do it even with a straight pipe cut just after the y pipe.
It's hard to get rid of.
Me, I like the sound.

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Seth
1985 Camaro
2.8L T-5 3.42LSD
Put hole in side of oil pan.
Mods, internaly balanced 88' 2.8L.
91' RS 3.1 5spd, wide open 3.23's

shortdog273 · 07-28-2002, 05:28 PM

Like Muckz said, I hear it on the V8s also.

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2000 BLACK FIREBIRD 3.8 A4 (Stock 3.42 Gears & LSD), 160* Hypertech Powerstat, Whisper CAI & Lid, K&N Filter, 3 Catco Highflow Cat, 3in. S Pipe, 2.75" Dynomax Catback, Sprint Springs, BMR STB, LCAs & Brackets.

MOFBA/FASTLOUIS Member... 1/4 Time: 14.981 @ 89.66 MPH