back pressure

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Dec 22, 2013 | 04:30 AM

88-347stroker

Thread Starter

3rd Gear Member

Joined: Oct 2013

Posts: 546

From: raleigh,nc

back pressure

Guys my 2.5 flow master super 44 mufflers don't seem to give me enough back pressure, if I down size to a 2-2.25 will that raise the pressure any

Dec 22, 2013 | 06:48 AM

Jeffk

6th Gear Member

Joined: Aug 2011

Posts: 7,233

From: Thomasville, NC Where we beat headers into submission!!

Why are you looking for more backpressure?

Dec 22, 2013 | 07:36 AM

Sleeper_GT

6th Gear Member

Joined: Feb 2012

Posts: 11,715

From: Raeford, NC - Where if it ain't broke, we fix it!

Smaller exhaust will increase your back pressure.....I'm guessing your car feels slower with the new exhaust.....

Dec 22, 2013 | 08:16 AM

88-347stroker

Thread Starter

3rd Gear Member

Joined: Oct 2013

Posts: 546

From: raleigh,nc

Yes on slower and exhaust popping when I let off the gas

Dec 22, 2013 | 08:17 AM

88-347stroker

Thread Starter

3rd Gear Member

Joined: Oct 2013

Posts: 546

From: raleigh,nc

I was told 347s like a little back pressure

Dec 22, 2013 | 08:26 AM

clowe1965

6th Gear Member

Joined: Aug 2011

Posts: 5,287

From: South Carolina, Axle swap anyone?

Yeah I've heard the same about the old push rods. Mine ran like crap until I put exhaust on it, guess it still runs like crap officially but I could tell a difference with the exhaust once the ringing subsided.

Dec 22, 2013 | 08:41 AM

Sleeper_GT

6th Gear Member

Joined: Feb 2012

Posts: 11,715

From: Raeford, NC - Where if it ain't broke, we fix it!

N/A motors like the back pressure.....Even with me being FI I could feel a power difference between the MBRP setups.....Car felt slower when I ran the straight pipes than with the mufflers.