2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

Official TVS Thread!!!

Old 04-13-2012, 03:22 PM
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i had an auger inset that broke apart and failed. sounded good but restrictive, i even tried cutting 1 of the three augers off to find a happy medium
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Old 04-13-2012, 03:32 PM
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Originally Posted by ebristol View Post
Resonator

1. Anything Magnaflow is out. Along with anything that has any packing.
2. My experiment with the SW smooth tube was a complete failure. A stock 12" LNF resonator sounded better then the SW 24" one and a metal spun cat.
3. I have read a lot of good things about the Moroso spiral flow resonators. They are basic resonator with and exhaust auger insert. They are short and affordable. Trusted people on this forum swear by exhaust augers but they are hard to find in a 2.5" version. If someone knows of one, let me know!
4. The LNF resonator performed well. The inlet measures like 2.65". So enough for a 2.5" cat-back.
5. ZZP's new 3 chambered round resonator. Don't know much about it but it is big and long which is what you want in a resonator.
6. Vibrant Ultra Quite works on a LSJ. I have heard paired with a SW Turbo chambered muffler and it sounds great. Even in 3". But the case is big and need to be installed at an angle to fit in the LSJ exhaust tunnel.
Thank you oh so much for that write up!!! It's been an ongoing battle with my exhaust since I changed it. I bought a 2.5" system through mandrel bent exhaust which came with a Borla PRO X2 muffler. Well I threw in a Magnaflow 14" resonator with it and it was loud as f**k. I installed a dynomax turbo muffler and it look the drone out going down the highway but still way too loud for me. So I tried out a Walker quiet flow muffler. It made a huge difference in making it quieter. But left me with a bunch of unwanted rasp. Hear it more in the 2-3000 rpm normal driving range. So I'm going to ditch the Magnaflow resonator and get something else. I was going to go with the SW oval 24" muffler as a resonator but reading your write up it didn't work very well? What would you recommend as a resonator to cut as much rasp out with all the combo's you've gone through?
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Old 04-13-2012, 03:42 PM
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hiii

i can haz 14gph meth nozzle?
i can haz 80s?
i can haz new tune?

i can haz cams?
i can haz ported headed?
i can haz pistons?
rods?
valve springs?

Last edited by tylerjclance; 04-13-2012 at 03:42 PM. Reason: Automerged Doublepost
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Old 04-13-2012, 04:15 PM
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Originally Posted by BlackMagic View Post
I have a moroso spiral flow and one or more of the augers broke inside and created a nasty rattle. I am running a catless 3in exhaust and I have read they do not like the heat and the pressure of a catless exhaust. I understand you are running catted 2.5 but I figured I would chime in since I have some experience with it. It did quiet it down nicely but it felt restrictive and dead on the low end until the augers broke lol it litterally didn't last a month though
Really? I did not know of anyone running one on the LSJ. I have only read about them on Subies and V8s. Interesting. A cat would make a big difference. The cat is designed to burn up the excess gas in the exhaust gases. If the cat is not there the gas will burn up in other places in the exhaust system.

Originally Posted by JapEatr View Post
i had an auger inset that broke apart and failed. sounded good but restrictive, i even tried cutting 1 of the three augers off to find a happy medium
That is good feedback.

Originally Posted by Bluelightning View Post
I was going to go with the SW oval 24" muffler as a resonator but reading your write up it didn't work very well? What would you recommend as a resonator to cut as much rasp out with all the combo's you've gone through?
I tried the SW Smooth Tube and it did not work for me. Like I said, the Stock LNF resonator out performed it and a metal spun cat.



The next one I would try from SW would be their Vintage Round. Its designed more like a traditional resonator.

I was really leaning toward the LNF resonator with a Moroso Spiral flow.

Or the ZZP 3 Chambered resonator. But I can't comment on it until I install it on my car.

Here is a vid of their 2.5" Cat-back on a Cobalt.
Cobalt SS/SC LSJ catback exhaust 2.5" ZZP - YouTube!
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Old 04-13-2012, 04:24 PM
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hmm, still sounds a bit too raspy at wot for me
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Old 04-13-2012, 04:26 PM
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Originally Posted by RooTBeeR View Post
hmm, still sounds a bit too raspy at wot for me
The camera is mounted 2' away from the tip. I am not sure how much better any exhaust could sound that close?
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Old 04-13-2012, 04:53 PM
  #307  
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needs a fly by
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Old 04-13-2012, 07:48 PM
  #308  
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ive got the zzp 3in its a realy nice setup and sounds great and it isent loud
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Old 04-13-2012, 10:13 PM
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I think I'm going to go out on a limb and try ZZP's resonator. I didn't even know they came out of their own. I heard they were coming out with another. It says in the descripition it's like their old whisper resonator. The quieter my exhaust, the more I hear my TVS haha.
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Old 04-13-2012, 10:32 PM
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I thought I would post this link up because there's some good TVS info

https://www.cobaltss.net/forums/dyno...-setup-276461/
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Old 04-13-2012, 11:46 PM
  #311  
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why in the **** do you think you need a 14gph nozzle?!?!
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Old 04-14-2012, 04:43 AM
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Originally Posted by tylerjclance View Post
hiii

i can haz 14gph meth nozzle?
i can haz 80s?
i can haz new tune?

i can haz cams?
i can haz ported headed?
i can haz pistons?
rods?
valve springs?
Why do you need a 14?

What pulley you using on the tvs?

Your not going to push timing hard enough to warrant the use of a 14 pre blower.
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Old 04-14-2012, 10:07 AM
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I will say this one more time and one time only. I run the gmp catback. I dont sell people on it simply said that it flows enough for my setup, and is THE BEST sounding catback system for our cars. Anyone that thinks the gmp doesn't flow better than the stock catback is smoking crack. When this exhaust first came out it was one of the only catbacks that had proven dyno gains of up to almost 9 hp without a tune. There is more to exhaust characteristics than just diameter. I'm done beating a dead horse the simple fact of the matter is for the money its a good catback it sounds the best and since i have run the fastest times on here that speaks for itself it terms of performance. Now I will say this I have never "hid" my other exhaust components and always tell everyone that asks my mods. I am running the vibrant equal lenghth header with downpipe but gutted the cat. To each his own but i am tired of hearing that the gmp won't suffice when no one else is running what I am. The gmp has more than proven itself to me and many others. Wes was running mid 12s and news flash he was also on the gmp. He was the second place guy to my 12.1.
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Old 04-14-2012, 02:29 PM
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My nozzle is like 8gph and it's doing it's job with my 2.6........... with timing at 20 alsoo
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Old 04-14-2012, 03:15 PM
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Originally Posted by TStone View Post
My nozzle is like 8gph and it's doing it's job with my 2.6........... with timing at 20 alsoo
I would hope so running a 2.6 on 60's. Your idc will be through the roof. I'm on a ten and we were seeing 74% at redline u running straight meth?
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Old 04-14-2012, 03:22 PM
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Originally Posted by zrated89 View Post
I would hope so running a 2.6 on 60's. Your idc will be through the roof. I'm on a ten and we were seeing 74% at redline u running straight meth?
I was jsut saying.. he was talking about a 14gph nozzle.. idk why that'd be necessary.. My IDC's are at 89%.. and noooo, it's like a 50/50 ISH, mix.. 3 heets to 1 wiper fluid
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Old 04-14-2012, 03:41 PM
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1 heet bottle, 12 fl. oz. and 1 gallon of -20 blue washer fluid is a pretty good 50/50 mix. three heets to one gallon of washer fluid? thats prolly like 90% meth
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Old 04-14-2012, 03:44 PM
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Originally Posted by sick CCSS View Post
1 heet bottle, 12 fl. oz. and 1 gallon of -20 blue washer fluid is a pretty good 50/50 mix. three heets to one gallon of washer fluid? thats prolly like 90% meth
whoa........................

&& I just remembered about that How to for mixing meth on here, and I went back and looked at it, and totally never even realized it said to pour out half.. all I ever remembered was 3 heets and 1 wiper fluid..
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Old 04-14-2012, 04:03 PM
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lol yea, just figured id let you know, i mean i guess it would be ok to run it like that, but if your looking for a good 50/50, then one is all you will need.
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Old 04-14-2012, 04:15 PM
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Originally Posted by sick CCSS View Post
lol yea, just figured id let you know, i mean i guess it would be ok to run it like that, but if your looking for a good 50/50, then one is all you will need.
Well I'm glad I know that now ahaha. It seems to work so i'll keep it here.. Any idea on how I could find out the EXACT percentage?
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Old 04-14-2012, 04:30 PM
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not to sure about exact percentage, i think heet (yellow bottle) is 99% and pending on which brand washer fluid you use, find the MSDS sheet for the product and it should give the differant %'s such as meth content/water content, then go from there.
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Old 04-14-2012, 04:42 PM
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Originally Posted by sick CCSS View Post
not to sure about exact percentage, i think heet (yellow bottle) is 99% and pending on which brand washer fluid you use, find the MSDS sheet for the product and it should give the differant %'s such as meth content/water content, then go from there.
says it's 30%.. how do I start doing the math?
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Old 04-14-2012, 06:37 PM
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Originally Posted by zrated89 View Post
I will say this one more time and one time only. I run the gmp catback. I dont sell people on it simply said that it flows enough for my setup, and is THE BEST sounding catback system for our cars. Anyone that thinks the gmp doesn't flow better than the stock catback is smoking crack. When this exhaust first came out it was one of the only catbacks that had proven dyno gains of up to almost 9 hp without a tune. There is more to exhaust characteristics than just diameter. I'm done beating a dead horse the simple fact of the matter is for the money its a good catback it sounds the best and since i have run the fastest times on here that speaks for itself it terms of performance. Now I will say this I have never "hid" my other exhaust components and always tell everyone that asks my mods. I am running the vibrant equal lenghth header with downpipe but gutted the cat. To each his own but i am tired of hearing that the gmp won't suffice when no one else is running what I am. The gmp has more than proven itself to me and many others. Wes was running mid 12s and news flash he was also on the gmp. He was the second place guy to my 12.1.
12.1? the last number matters
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Old 04-14-2012, 06:43 PM
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Originally Posted by TStone View Post
says it's 30%.. how do I start doing the math?
Haha I'll prolly sound very stupid but I suck at math and idk what to do but I'm sure you will have to use ratios also
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Old 04-14-2012, 06:49 PM
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Originally Posted by sick CCSS View Post
Haha I'll prolly sound very stupid but I suck at math and idk what to do but I'm sure you will have to use ratios also
Aha I kinda figured /: Guess i'll just assume lol
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