Borla XR-1
Melting Slicks
Joined: Nov 2003
Posts: 2,555
Likes: 5
From: Fredericksburg VA
I'm telling you that AFTER we added the XR1 Race pipe setup and a Volant CAI, my 99M6 Coupe only made 296HP and 301#ft. torque.
I installed LGM LTs, SLP 3inch Cats, a custom Xpipe and Stingers, LS6 intake and a shaner TBody and made 335HP and 353#ft. torque with an LS1Edit tune.
Then with a heads/cam packages and the LGM LTs, SLP 3inch Cats, a custom Xpipe and Stingers, LS6 intake and a shaner TBody I laid down 375/370 to the wheels with a custom LS1Edit tune.
THEN, about three weeks ago I went back to the dyno for the Corvette Forum day at Carolina Auto Masters and with a change to the Bassani Xpipe and the Z06 Mufflers, and a mild re-tune to clean up the fuel map, we picked up an additional 11HP and 10#ft. torque. I'm at 386/382 now.
And the car sounds much better when on the hiway. No resonation or droning.
My personal opinion is those Borla XR1 Systems don't add ANYTHING to your performance... They, like many other makers of aftermarket parts are marketing an item and want your money... They claim "Up to" XX % performance gains... Up to, or less than.
I experienced the "or less than" part of it!
Mike
I installed LGM LTs, SLP 3inch Cats, a custom Xpipe and Stingers, LS6 intake and a shaner TBody and made 335HP and 353#ft. torque with an LS1Edit tune.
Then with a heads/cam packages and the LGM LTs, SLP 3inch Cats, a custom Xpipe and Stingers, LS6 intake and a shaner TBody I laid down 375/370 to the wheels with a custom LS1Edit tune.
THEN, about three weeks ago I went back to the dyno for the Corvette Forum day at Carolina Auto Masters and with a change to the Bassani Xpipe and the Z06 Mufflers, and a mild re-tune to clean up the fuel map, we picked up an additional 11HP and 10#ft. torque. I'm at 386/382 now.
And the car sounds much better when on the hiway. No resonation or droning.
My personal opinion is those Borla XR1 Systems don't add ANYTHING to your performance... They, like many other makers of aftermarket parts are marketing an item and want your money... They claim "Up to" XX % performance gains... Up to, or less than.
I experienced the "or less than" part of it!
Mike
Last edited by Mikelly; Feb 1, 2006 at 03:06 PM.
Thread Starter
Acct suspended by request 27 June 2011
Joined: Oct 2005
Posts: 109
Likes: 0
Originally Posted by Mikelly
I'm telling you that AFTER we added the XR1 Race pipe setup and a Volant CAI, my 99M6 Coupe only made 296HP and 301#ft. torque.
I installed LGM LTs, SLP 3inch Cats, a custom Xpipe and Stingers, LS6 intake and a shaner TBody and made 335HP and 353#ft. torque with an LS1Edit tune.
Then with a heads/cam packages and the LGM LTs, SLP 3inch Cats, a custom Xpipe and Stingers, LS6 intake and a shaner TBody I laid down 375/370 to the wheels with a custom LS1Edit tune.
THEN, about three weeks ago I went back to the dyno for the Corvette Forum day at Carolina Auto Masters and with a change to the Bassani Xpipe and the Z06 Mufflers, and a mild re-tune to clean up the fuel map, we picked up an additional 11HP and 10#ft. torque. I'm at 386/382 now.
And the car sounds much better when on the hiway. No resonation or droning.
My personal opinion is those Borla XR1 Systems don't add ANYTHING to your performance...
Mike
I installed LGM LTs, SLP 3inch Cats, a custom Xpipe and Stingers, LS6 intake and a shaner TBody and made 335HP and 353#ft. torque with an LS1Edit tune.
Then with a heads/cam packages and the LGM LTs, SLP 3inch Cats, a custom Xpipe and Stingers, LS6 intake and a shaner TBody I laid down 375/370 to the wheels with a custom LS1Edit tune.
THEN, about three weeks ago I went back to the dyno for the Corvette Forum day at Carolina Auto Masters and with a change to the Bassani Xpipe and the Z06 Mufflers, and a mild re-tune to clean up the fuel map, we picked up an additional 11HP and 10#ft. torque. I'm at 386/382 now.
And the car sounds much better when on the hiway. No resonation or droning.
My personal opinion is those Borla XR1 Systems don't add ANYTHING to your performance...
Mike
Instructor
Joined: Jul 2005
Posts: 206
Likes: 0
From: Cussing at my car somewhere
Originally Posted by powlison
So you don't find the resonance overly annoying or anything? I mean, I certainly don't mind engine noise in the cabin. That's not a problem for me at all. I was just hoping there wouldn't be like rattling or something like that. That could be annoying I guess.
It's definitely loud, and definitely gives a loud hum inside the car at 1500-2500rpm under throttle, but above that, and cruising, it's pretty quiet.
Like someone said previously, everyone, including myself, hears it when I get on it.
If you're going to get it, and leave it stock with the cats in tact, it's not bad at all. Again, like others have said - it's VERY exotic-sounding. I wanted a bit more, so I removed the cats, and of course, everything's a bit louder.
2nd Gear
Joined: Dec 2003
Posts: 2
Likes: 0
From: Tampa FL
powlison, I was in a similar state to you 2 years ago. Stock 2002 ragtop but wanted much better sound. After hunting down and listening to virtually every muffler system out there, I was seduced by the raw music of *no* mufflers. I put just the back half of the XR-1 (pipes only - no center resonator) on my car and absolutely love it. Can't beat the ~$300 price either. I don't have any interior resonance problems, but presumably that's helped by the ragtop. If you want a free preview, just remove your mufflers and take a spin. The sound going past 5000RPM is fantastic. Even my wife has come to like them, now she thinks all other vettes sound "too wimpy". No problem with long distance cruising either.
As far as power goes, I don't have dyno numbers but there's definitely more, to the point where I'm looking to upgrade my tires to reduce wheelspin. Plus, I never hit the 1-4 skipshift anymore - sounds too good to shift low!
As far as power goes, I don't have dyno numbers but there's definitely more, to the point where I'm looking to upgrade my tires to reduce wheelspin. Plus, I never hit the 1-4 skipshift anymore - sounds too good to shift low!
Racer
Joined: Aug 2001
Posts: 250
Likes: 0
From: Clarksville MD
I have had several exhausts including the XR1. Way too lound for a daily driver. I just recently installed electric cut-outs and wish I had done this years ago. Loud when I want it loud and quiet when I need to be more civilized.
