:smash: You do need to listen to any muffler before you blow 500 plus buck on them. Personally I love my borlas on my 87 so much I bought a pair of borlas for my 83 suburban. The 87 vette has the intercoller tips. They look great and sound great. I'm not sure what the guys are talking about borla resonance. I have not had that problem at all. The do sound loud when you get on it hard but quieten down to almost nothing at crusing speeds when the engine is not loaded, top up or down. They are not as loud as Monzas. I've not heard corsas. My 86 had stainless dynamax or dynaflows. I think thre dynamax. Now that's resonance. I hate the dynamax. There getting replaced with borlas. With the top up, they resonate so much that you can't have a conversation and it is really irritating. Flowmasters on a corvette? UGH, lets put some good ol quaker state in the crankcase while we're at it. Vette deserve the best. One thing about the borlas. They are a pain in the butt to get them on straight. This is common on the borlas and the dynaflows. Mine were installed using the factory y pipe. You may want to consider the borla y pipe. This may resolve this issue. I don't think you will be disappointed with the borlas. FYI, I drove an 86 with headers and side pipes. I was surprised that it sounded like a suped up *** motorcycle!!

 

Eh, Borla, Flowmaster, Dynomax, Thrush....... it's all the same, just different tones........... want a good set up?

Buy Power Effects or Tri-Flo, the quality of the two out weigh the above said by more than twice over, BUT, check the sound on someones car either way!

Plus, when was that exhaust test or whatever. These two gained more than any other company's cat-back, not to mention the fact that Borla and Flowmaster resulted in just about nothing :cheers:

[edit] Corsa's are loved on the forum too! Gotta be a reason for it...


[Modified by BowTieBlood, 1:02 PM 9/10/2003]

 

Here are my objective and subjective observations on exhaust, including the
Borla on my '95 LT1 6-speed:

- Stock system made 267hp at the rear wheels, and was whisper quiet,
even under full throttle, which, of course, is no fun. ;-)

- Flowmaster mufflers (just mufflers) made 286hp at the rear wheels, but the
resonance was unbearable from 1500-2200rpm. I loved the extra power,
but couldn't cruise in 6th on the highway below 75mph. These mufflers
actually gave me headaches after cruising on the highway. They also didn't
sound that great under full throttle, just friggen loud.

- Walker Super Turbo mufflers (with LT1 tips) made 279hp at the rear wheels,
and were quiet, maybe a bit too quiet. They didn't sound like much under full
throttle, but were a little better than stock, and a welcome relief after the
Flows. They rusted out around the rear hangers after 3 years.

- Installed a used Borla cat-back system this spring to replace the rotted out
Walkers. Didn't use all of the pipe up to the collectors, cut off the stock
system just before the neck-down into the resonator, so it's 2.5" all the way
back, but retained the stock O2 sensor mounts. There is definitely some
resonance 1600-1900, but it's not nearly as bad as the Flowmasters, and
it's tolerable to cruise at 65 in 6th gear (but better at 75). ;-) Best of all,
the Borlas make this great V8 burbling sound when you're cruising around
at 2500 rpm, and they sound awesome at wide open throttle. I haven't
had these on the dyno yet, so I don't have numbers, but fully expect them
to match or beat the Flows based on seat-of-the-pants.

Note that A4 drivers will not have the same kind of resonance issues as
6-speeders, since the A4 runs a few more revs at cruise, they are mostly
out of the resonance range.

Also note that the first dyno run was made at a different shop than the
other two, but they were all the same model DynoJet.

-Herb

 

I still sat elims' or Monza's are the way to go for cat-back. :p:

 

Just a couple questions and/or comments on this.... First of all, and by all means, please correct me if I'm wrong, but isn't the STOCK piping 2 3/4"??? :confused: Why go smaller? I'd rather have the 2 3/4" than the 2 1/2", but that could just be me.

Secondly, NO ONE should be able to feel a "seat-of-the-pants" difference when installing Borla mufflers, more or less any mufflers. The difference just isn't great enough for it to matter even in a 1/4 mile usually. The .001 that your average person is going to pick up won't dramatically affect anything other than mental images of going faster.

Not trying to put you down, just don't want someone else to read this and think they're going to gain 2/10 or more in the 1/4 or something. If you want seat of the pants, buy gears, converter, slicks, heads/cam, etc.

 

Point well made. However, enough of the right bolt-ons do add up to something, (as my dyno run would suggest).

BTW : Bowtieblood. I used to live in RR TX. How are things over there these days? Ive been away since '95. Bet its grown a lot !
:flag


FWIW : "Mufflers ? We don't need no stinking mufflers " :D

 

Well, I'm actually from Austin, lived there all my life, my parents just moved out there in January and I lived near there until I got my first degree, I'm in Lubbock now going to Texas Tech, going for Mechanical Engineer ironically... wish me luck haha......... but RR, well, it's still low key and kind of dead, but thanks to the Dell Diamond and ole Nolan, things are most def. picking up..... they had a pretty cool Corvette show out there about 3 weeks ago I wanna say, saw some of the cars I wish I had.

 

[QUOTE]-
> Just a couple questions and/or comments on this.... First of all, and by all means, please
> correct me if I'm wrong, but isn't the STOCK piping 2 3/4"??? :confused: Why go
> smaller? I'd rather have the 2 3/4" than the 2 1/2", but that could just be me.

You're probably right. I didn't actually measure the diameter, just eyeballed it. The pipes
supplied by Borla are the same size as the stock system without the neck-downs that
are present in the stock system. Look carefully - although the pipes on the stock system
are 2-3/4 (if that's what they are), there are neck-downs before the resonator, before
the mufflers, and even *after* the mufflers at the tips on the stock system.

> Secondly, NO ONE should be able to feel a "seat-of-the-pants" difference when
> installing Borla mufflers, more or less any mufflers. The difference just isn't great
> enough for it to matter even in a 1/4 mile usually. The .001 that your average person
> is going to pick up won't dramatically affect anything other than mental images of
> going faster.
>
> Not trying to put you down, just don't want someone else to read this and think
> they're going to gain 2/10 or more in the 1/4 or something. If you want seat of the
> pants, buy gears, converter, slicks, heads/cam, etc.

Now that I think of it, I also had a K&N and open airbox, but I picked up 3/10th
and 4 mph after the exhaust/K&N/airbox swap. Maybe some of that is an
improvement in my driving, or better weather at the track (all runs at the same
track), who knows, but I have the dyno charts and time slips.

Make of it what you will, but personally, I can't stand it when someone says
that NO ONE can do something, just because they can't do it themselves.

Your mileage may vary. Mine apparently does.

-Herb

 

:lol: :lol: :lol: :lol: :lol: :lol:

Guess all those magazines were right about how the airfoil gives you 15 PROVEN horse power too! God forbid I comment on something that's been proved time and time and time and time and time and time and time and time and time........ and time again all across the country in all conditions. :cheers: Must just be ME who can't do it lol.

You can believe what you want, but I was trying to not persuade someone into buying a system and expecting these results and in turn find out that it just isn't going to happen. If you do a search on the forum, you will find MANY posts that will confirm what I said about exhaust not giving you all of this time in the 1/4 mile. And of course weather and you knowing the car better help, that's the whole reason people go to the track on certain days and why professional racers are just that, professionals!


[edit] btw, Mid America claims that their cat-back Flowmaster system, with a chip provided an extra 70 horse power.... they did it, why can't I? :rolleyes:

Also, in the original post about your comments, I said "not trying to put you down," just trying to help inform others of more abundant results, don't mean to :mad , but trying to HELP them out.


[Modified by BowTieBlood, 11:57 AM 9/11/2003]


[Modified by BowTieBlood, 12:00 PM 9/11/2003]

 

Whatever, dude.

Someone asks for input, I give them what I have, hard numbers, that I
produced with my own little butt in the seat, in the real world. Nothing
you can say will erase the ink on the page. I'm not selling anything, and
next time I'll know better than to offer any information, for fear of
offending any of the "experts".

 

:boxing

 

ONCE AGAIN, let me quote exactly what I said the first time, "not to put you down," over-all results from members show otherwise. Read the entire post before you start arguments, that would be the THIRD time that I've said "not to put you down." :rolleyes: :rant:

To end this nonsense, to the original poster, I would suggest looking up exhaust questions/results in the archives and other recent topics as you'll see a broader range of opinions without these results, sorry that your question has been lead astray. Also, don't forget to listen to numerous Corvettes in the area if sound is your primary goal with exhaust, they will vary GREATLY.

:sleep:

 

Because you don't have a ZR1. If you read the fine print, it says the 70hp was gained on a stock ZR1, with programming.

 

Check ZR1.net they talk about it. The stock ZR1 exhaust is pretty good already, the most you could get with an exhaust in a ZR1 is 20-25hp, and the programing BS is just that. :bs

 

I personally like the sound of Borla better at idla and above 2500RPM then anyother muffler. I like flowmaster for that 1400-2400RPM range, FM have a soothing rumble at cruise. MY Borla exhaust at cruise is slightly louder then it should be IMHO; but it sounds like a vette, loud and nast.

 

:iagree:
I've had the Borla Mufflers for over 5 years. That darn thing resonates the heck out of my car. Wth the AC on and the windows up.. IMHO it's way to loud. With the windows down, it's freaken awsume.

 

I was just browsing through Borla's site and didn't see any options to hear... You sure??