Need Exhaust suggestions

MetallicaCougs · 01-18-2008, 11:29 PM

I am going to put a new exhaust in the car. First question: What size pipes? I have 2 1/4" in now. Ever since I got the headers installed, I can feel back pressure. I know I need to go bigger but how much is the question. Its got CAI, Injen intake SVT tb, extrude honed uim, and headers. Is 3" too much? I'm thinking 2.75 or 3.

Second question: I have magnaflo now, but its too loud. Neighbors give me dirty looks. What gives a low rumble?

jaged · 01-20-2008, 12:56 AM

eff the neighbors

i have the trubendz kit with the borla on it. its not bad, but can be loud when yo want it to be

3" is too big. a 2.5" kit would be plenty for you

MetallicaCougs · 01-20-2008, 01:54 PM

Would .25" really make much of a difference? I just don't want to waste money and still feel the back pressure. I wish there was some way to test to find out what would work.

cna · 01-20-2008, 02:05 PM

i got a full 3"in Exhaust done with out the 3rd cat and for me it was worth it car run's smoother but if your car is loud now it will be even louder after 3in piping

ov3n · 01-21-2008, 12:30 AM

What does backpressure 'feel' like?

MetallicaCougs · 01-21-2008, 07:27 PM

cruising speed is fine, acceleration is when you feel it. basically, car eats a can of beans and can't lift up its butt cheek to let it out.

JChaseDead · 01-21-2008, 07:56 PM

B3NN3TT · 01-21-2008, 09:06 PM

(trolling...)

I dunno; I'd say that's a different problem entirely.

GMK was laying down mid-14 second quarter-mile runs with a 2.5" exhaust. The larger the diameter, the lower the exhaust velocity, the worse the scavenging becomes. It's pretty much a rule that 2.5" is ideal for a modified N/A 2.5L.

The secret to a nice exhaust note is a resonator of some kind. A muffler with just truck-tip straight pipes out the back is LOUD, no matter what kind of muffler it is. If there are resonators before the tips, it cleans it up and refines the exhaust note immeasurably.

I started out with a Flowmaster muffler and straight pipes out, and took it off because it was embarrassingly loud. I added a pair of Borla resonators, and it's FANTASTIC.

Your Magnaflow would probably sound great with resonated tips.

(end trolling

)

ND4SPD · 01-21-2008, 09:58 PM

Quote:

Originally Posted by MetallicaCougs

cruising speed is fine, acceleration is when you feel it. basically, car eats a can of beans and can't lift up its butt cheek to let it out.

That should SO be added in the Performance FAQ section

Honzo · 01-21-2008, 10:01 PM

Quote:

Originally Posted by ND4SPD

That should SO be added in the Performance FAQ section

I second that motion

01-18-2008, 11:29 PM	#1 (permalink)
MetallicaCougs Village Crusher Join Date: Oct 2000 Location: Indiana Posts: 8,157 Blog Entries: 1	Need Exhaust suggestions I am going to put a new exhaust in the car. First question: What size pipes? I have 2 1/4" in now. Ever since I got the headers installed, I can feel back pressure. I know I need to go bigger but how much is the question. Its got CAI, Injen intake SVT tb, extrude honed uim, and headers. Is 3" too much? I'm thinking 2.75 or 3. Second question: I have magnaflo now, but its too loud. Neighbors give me dirty looks. What gives a low rumble? __________________ * * * The MetallicaCoug has been sold. 12/7/08 * * *

01-20-2008, 12:56 AM	#2 (permalink)
jaged waiting for cones Join Date: Mar 2003 Location: hebron, in Posts: 14,629 Images: 3	Re: Need Exhaust suggestions eff the neighbors i have the trubendz kit with the borla on it. its not bad, but can be loud when yo want it to be 3" is too big. a 2.5" kit would be plenty for you __________________ BUY COUGARFEST RAFFLE TICKETS SM 86 now with two choices 2.5L or 3L

01-20-2008, 01:54 PM	#3 (permalink)
MetallicaCougs Village Crusher Join Date: Oct 2000 Location: Indiana Posts: 8,157 Blog Entries: 1	Re: Need Exhaust suggestions Would .25" really make much of a difference? I just don't want to waste money and still feel the back pressure. I wish there was some way to test to find out what would work. __________________ * * * The MetallicaCoug has been sold. 12/7/08 * * *

01-20-2008, 02:05 PM	#4 (permalink)
cna NECO Member Join Date: Jun 2007 Location: NYC Posts: 112	Re: Need Exhaust suggestions i got a full 3"in Exhaust done with out the 3rd cat and for me it was worth it car run's smoother but if your car is loud now it will be even louder after 3in piping __________________ My Cardomain

01-21-2008, 12:30 AM	#5 (permalink)
ov3n King Cock Join Date: Oct 2000 Location: South Bend, IN Posts: 8,315	Re: Need Exhaust suggestions What does backpressure 'feel' like? __________________ I can has CougarFest 2009 in South Bend, Indiana!

01-21-2008, 07:27 PM	#6 (permalink)
MetallicaCougs Village Crusher Join Date: Oct 2000 Location: Indiana Posts: 8,157 Blog Entries: 1	Re: Need Exhaust suggestions cruising speed is fine, acceleration is when you feel it. basically, car eats a can of beans and can't lift up its butt cheek to let it out. __________________ * * * The MetallicaCoug has been sold. 12/7/08 * * *

01-21-2008, 07:56 PM	#7 (permalink)
JChaseDead NECO Member Join Date: Nov 2007 Posts: 115	Re: Need Exhaust suggestions

01-21-2008, 09:06 PM	#8 (permalink)
B3NN3TT Secretary of the Inferior Join Date: Jun 2002 Location: Columbus, Ohio Posts: 10,677 Images: 52	Re: Need Exhaust suggestions (trolling...) I dunno; I'd say that's a different problem entirely. GMK was laying down mid-14 second quarter-mile runs with a 2.5" exhaust. The larger the diameter, the lower the exhaust velocity, the worse the scavenging becomes. It's pretty much a rule that 2.5" is ideal for a modified N/A 2.5L. The secret to a nice exhaust note is a resonator of some kind. A muffler with just truck-tip straight pipes out the back is LOUD, no matter what kind of muffler it is. If there are resonators before the tips, it cleans it up and refines the exhaust note immeasurably. I started out with a Flowmaster muffler and straight pipes out, and took it off because it was embarrassingly loud. I added a pair of Borla resonators, and it's FANTASTIC. Your Magnaflow would probably sound great with resonated tips. (end trolling ) __________________ Andy- Ohio NECO's "Green Guy" 2nd Place - Best Mild • CougarFest 07 & 08 2000 Tourmaline Green Roush clone • Proud ND4SPD Army Dog Soldier Complete mod list & photos at OHIO CUSTOMS B3NN3TT • CougarDB • CarDomain • Motortopia • MySpace • deviantART • Last.fm 1986 Merkur XR4Ti - under construction for reals

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