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

 

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?

 

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?

 

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.

That is good feedback.

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!

 

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?

 

needs a fly by

 

ive got the zzp 3in its a realy nice setup and sounds great and it isent loud

 

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.

 

I thought I would post this link up because there's some good TVS info

https://www.cobaltss.net/forums/dyno...-setup-276461/

 

why in the **** do you think you need a 14gph nozzle?!?!

 

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.

 

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.

 

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?

 

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

 

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..

 

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?

 

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?

 

12.1? the last number matters

 

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