Borla Exhaust Pop, Normal?
Thread Starter
Staging Lane
Joined: Mar 2004
Posts: 53
Likes: 0
From: Glen Burnie, MD
Borla Exhaust Pop, Normal? I have a Borla Cat-Back W/ Stock Manifolds and I'm Running the open plate. Is it normal for the exhaust to pop alot? Warmed up i'm only running it up to 2500 - 3000 and as soon as i clutch in, Pop pa pop pop! and sometimes its loud like a backfire. thanks
Yes, it's normal. The open plate and low backpressure cuase the popping noise. My '95 LT1 car did it with the borla and the LS1 cars do it as well.
Don't worry about it and keep you foot in the gas.
Don't worry about it and keep you foot in the gas.
Originally Posted by SNAKSLYR
We have a Borla on the 01 SS, it pops when it's cold only. But I've heard others pop more or not. It's normal. My old Loudmouth popped to much due to no backpressure.
Backpressure is a myth. Resonant scavenging is what its called. the sound waves reflect back and forth, which then produces a pop. resonant scavenging is what you need. The more "restrictive" your exhaust, the lower your torque peak will be in the RPM's when you have open headers you scavenge higher in the RPM's like stock exhaust your torque is gunna peak at like 3450... with open headers itll peak prolly 4500. "restrictive" exhaust you make less horsepower, and torque is lower in the RPM, so it "feels" faster, but if you put a cutout on, you dont feel as much downlow, but you scream up top, go run a 1/4 with a cutou closed w/ stock exhaust, and then go run a 1/4 with a cutout open. You'll see the difference in te time and trap speed.
TECH Apprentice
Joined: Jul 2002
Posts: 306
Likes: 0
From: Ohio
Originally Posted by Fuzzball
I have a Borla Cat-Back W/ Stock Manifolds and I'm Running the open plate. Is it normal for the exhaust to pop alot? Warmed up i'm only running it up to 2500 - 3000 and as soon as i clutch in, Pop pa pop pop! and sometimes its loud like a backfire. thanks
Enjoy...mine has done it for 2 years 
