Borla vs. Stock

What kind of true hp gain can be expected with the installation of a Borla catback system?

I ordered one and should have it on in the next week or so. I can't wait!

about 15 hp don't expect to feel alot of power gain you will only see it in times

I felt a SOTP difference with my Borla. It was the first mod I did (not counting the K&N) and I couldn't be happier. Which one did you get - the adjustable or non-adjustable??? As far as power goes, I'd say you'll see 12~18 rwhp depending on what system you went with.

12-18rwhp is pushing it, IMO.

I think the "seat of the pants" difference is probably in your head, most likely caused by having a car that sounds a hell of a lot faster than it did before. I didn't notice one.

Gains may be 10-15hp at the crank like the other guy said.

17 hp and 12 ft-lbs at the wheels

the only time you feel a seat of the pants feel is with headers.:cool:

when i got borla, the main difference i could tell was at higher speeds....punching it on the highway felt so much nicer after i got borla.

Originally posted by tailwindxr7
12-18rwhp is pushing it, IMO.

I think the "seat of the pants" difference is probably in your head, most likely caused by having a car that sounds a hell of a lot faster than it did before. I didn't notice one.

Gains may be 10-15hp at the crank like the other guy said.

If you're commenting on all cat backs that's a load of crap. The difference I've noticed with my Loud Mouth is not in my head.

And there's also people out there that claim they feel a significant difference with minor crap like a TB bypass or a MAF descreen.

I doubt your Loudmouth gave you more power than my wide-open Borla, and like I said, I didn't notice much. The gains are probably there, but there's no way I could honestly proclaim "wow, this car feels exactly 14.7hp stronger than it was two hours ago!"

So say whatever you want.

I'm with tailwindxr7 you might notice a little but not enough to say now that is horsepower... the louder sound may make you think you feel the power

And if it helps... My 1st catback was the flowmaster, then i got a borla adjustable, and currently i have the loud mouth and sound wise i like the l/m best becaus it has more of a muscle car sound and i couldnt tell a difference between the borla when it was wide open and with the smallest plate. And some people say the l/m disent sound good with headers, but it sounds really good on my car, a real deep sound, but at idle when its cold it does have a little airy sound to it. But from a performance stand point i gained 2 tenths on motor going from flowmaster to borla. I never did a nitrous pass with the borla. But i went from 7.4s to 7.2s on nitrous with the l/m.

Originally posted by tailwindxr7
And there's also people out there that claim they feel a significant difference with minor crap like a TB bypass or a MAF descreen.

I doubt your Loudmouth gave you more power than my wide-open Borla, and like I said, I didn't notice much. The gains are probably there, but there's no way I could honestly proclaim "wow, this car feels exactly 14.7hp stronger than it was two hours ago!"

So say whatever you want.

Then I say there's something wrong with your car. And your comment about your Borla flowing better then my Loud Mouth is probably all in your head too.

I can't say much about the Borla or any other muffler system for that matter yet... mine is still stock. But I can say that the sound from a stock setup is BORING!:o A Z28 should sit at a stop and rumble... not just sit there and quietly hummm like a pu**y. When I hit the gas i want to be able to scare small children and old people.;) So... any body got any suggestions that would help me out?

Originally posted by 02Camaroguy1775
I can't say much about the Borla or any other muffler system for that matter yet... mine is still stock. But I can say that the sound from a stock setup is BORING!:o A Z28 should sit at a stop and rumble... not just sit there and quietly hummm like a pu**y. When I hit the gas i want to be able to scare small children and old people.;) So... any body got any suggestions that would help me out?

If you're looking for very loud then go with the Loud Mouth. :)

I would have to say you have to hear all three some like diffrent sound I like the borla flowmaster mut not so much loud mouth

Originally posted by Z06next
What kind of true hp gain can be expected with the installation of a Borla catback system?

I ordered one and should have it on in the next week or so. I can't wait!

back to the question at hand...:) I would think less then 12hp should be expected out of any aftermarket catback...remember its a cumulative effect...if you dont unrestrict the first part of the exhaust ie headers, ypipe high flow cat...the rest of the exhaust wont do much for you...im sure if you did some long tubes, no cats and a borla or loudmouth youd probably gain close to 30hp at the wheels but its all the mods for a specific part of the whole process that makes the most power....think of a funnel only backwards small end being the stock manifolds and cats and the large end being the borla at that small end it would only allow so much liquid/air to escape but then after that part ends you get to the larger side of the funnel and it lets all kind of fluid/air through. I hope that helped...also as far as mods go with seat of the pants feel...i think there are only a handfull of mods that you can actually feel...tq converter, gears, poweradder ie nitrous, blower, turbo, cam & heads thats about it....unless you do a full exhaust system its impossible to feel the difference...2 reasons i feel this way...on my truck when i did the blower i ran over a full second quicker and 10mph faster in the 1/4...that you can feel...i didnt feel the difference with my hypertech, i didnt feel a difference with my dynomax cat back...i didnt even feel a difference with my electric fan though it netted me .3 tenths in the 1/4 over my stock acces. driven model...it takes a lot to be able to feel a mod unless you have a super ass for this kinda stuff :) i obviously dont.

lata
Bill

Thanks for all of the great feedback guys. The Borla is my first step on the long list of my future mods. The non-flattened Y pipe and headers will hopefully follow in the next 12 months or so, as money and the wife allow.

I guess I was just fed up with the stock sound (or lack thereof) and I wanted to get something that flowed well.
For me it seems the Borla adjustable was my best choice, especially considering how sensitive the cops are in my area. In the local traffic court, I've seen plenty of guys fighting tickets for loud exhausts (while I was there fighting a ticket for no front license plate frame). I stayed away from the Loudmouth and the GMMG for just that purpose. Hopefully the Borla will give me the sound and performance I'm looking for without being a magnet for my local police.

Speaking of stock/factory sound, it's almost embarassing to have a Z28 as quiet as it is right off the showroom floor. I was next to an '03 SVT Cobra yesterday in traffic and the damned thing sounded awesome - still had temp dealer tags so I'm assuming it was the stock exhaust. Even a stock Dodge Ram contractor's pickup with the Hemi sounded good at idle in traffic.

Originally posted by SiggyBaby
Then I say there's something wrong with your car. And your comment about your Borla flowing better then my Loud Mouth is probably all in your head too.

There's nothing wrong with my car, thanks.

I'm sorry you feel that your ass is a great horsepower measuring tool.

Also, I did not say my exhaust outflowed yours. The last thing I want right now is another pissing match between exhaust brands, which is what you're looking to start. My original point was that I seriously doubt anyone can feel the difference in horsepower after installing something as simple as another catback. Will you feel a rumble? Sure. Will your car sound a hell of a lot meaner and make it seem like it's faster? Probably. Can you tell there's a horsepower difference by sitting in it? Doubt it.

But then again, I'm sure if someone sat you blindfolded in one LS1 car with a lid and another that was stock and floored both of them, you could tell which was which, right? :rolleyes:

Originally posted by tailwindxr7
I'm sorry you feel that your ass is a great horsepower measuring tool.

And I'm sorry your car's not powerful enough to provide the same feel. Stop getting your panties in a wad, we're just sharing information here. :D

I'm not getting pissed.

I just find it amusing at best how you can somehow claim my car is weak because I don't claim to feel a 10hp difference. An exhaust is not a supercharger. Like I said, I'm sure if someone threw you blindfolded in each of those aforementioned cars I mentioned in my last post, you'd really be able to tell the difference...or at least, you'd probably think you could.