anybody think making a longer defouler will stop a code from popping on the catless dp? on 8thcivic theres a popular defouler made by weapon r that works pretty well.

 

you could do that. You don't want one too long bc then you will be having the same issue as having the 02 sensor receive too much air.

but yes, that could and would work.

 

there is more to it than dals. it's a simple term people on here understand. the last two lnf's with gms1 i have dynoed have pulled torque down to below 230ft lbs. BOTH cars had mods.

airflow outside of the bounds of the predetermined air flow allowed is what triggers it. x air flow at y rpm at z load equals C torque reading. in a nutshell.

my lsj makes over 300ftlbs all day to the tire.

 

i have gms1 with catted dp and catback exhaust from mpx. i haven't dyno'd but i lined up against a buddy who has AEM intake and gms1. we were even until about 4000rpm where i just started pulling on him pretty hard. excellent upgrade.

 

somethings wrong with their cars. I'd be pissed if I made less than 300 to the wheels with GMS1...considering it's rated at 320 and I've got a catless downpipe too.

 

It's so funny that many of you have purchased the GMS1 to stay in warranty, then turned right around and put an aftermarket part on your car.

 

Dp was the biggest difference on the butt dyno and at the track intake I don't think did anything or the charge pipes for that mater
Josh

 

Well, that's true. lol. But my dealer doesn't seem to care about exhaust upgrades...now if they caused a problem I know they would be sketchy, but they have yet to give me any trouble about it.

 

Probably because vehicles in general are less likely to have problems caused by exhaust/intake as compared to someone going in and changing parameters on the motor itself with a tune. Either way they would have to prove that what you did to the car caused the problem.

 

Magnuson-Moss Warranty Act of 1975.

 

troof...gm's lnf "learndown" feature means mods are pointless until u get a tune to bypass/remove tq managment

 

one made 386ft lbs. the other detuned a bit from the norm did 355 ft lbs. once the torque management nannies were fixed.

 

That is a pipe-dream.
Read this:
https://www.cobaltss.net/forums/08-10-ss-turbocharged-general-discussion-152/interesting-pi-lnf-214992/

 

"If repairs to the engine are the result of the installation or use of a non-GM approved part, the warranty will not be honored."

Again. Magnuson-Moss Warranty Act of 1975.

 

why is that funny? Dont you realize how easy it is to swap bolt on parts back for warranty work?

Speaking of which I just put my catted dp on dunno if I feel power gains but its louder.

 

F the warranty. If you don't have the extended oh well. Only thing to worry about with warranty work is a engine and tranny replacement.

 

Just wanted to put all these GMS1 posts at the top to see the ridiculousness.

 

Quick question, may have been answered already but.. I have the GMS1 kit installed already, my next plan of action is a hahn downpipe (high flow cat) and hahn 3 inch exhaust. Thoughts on this? Do I need the exhaust cause i know the stock downpipe is pretty restrictive but i wasnt sure if i needed to upgrade the exhaust as well. Thanks!

 

The general opinion/ dynos ive seen the 3" exhaust is only necassary with a turbo swap. the factory exhaust is plenty capable of handling the stock turbo with a better flowing cat. never done it myself but seen enough info to believe that its pretty true. most people claim only 1-2hp with the exhaust and a k04. even thats disputable with that small of numbers as dynos are not that accurate way too many factors. DP shows a noticable difference for sure though and butt dynos would agree...

 

....with the build quality on these cars you need that warranty for all the **** thats now leaking, tearing, breaking etc etc.

 

I realize this has pretty much been covered, but at the end of the day there is some info "between the lines";
1) It is the responsibility of a GM tech to check your tune if you're in for any warranty work; they take a digital picture of the code ID, and send it to GM for verification.

2) aftermarket parts like exhaust or intake although technically speaking can make you liable to loose warranty for related components ect, but it is entirely up to the discretion of the servicing dealer as to how much lea-way they will grant you.

I for one was quite tempted in late 2008 already to buy an SS/TC, but hte local dealer had a zero tolerance towards any aftermarket parts (even though they sell & install aftermarket exhaust ect).
When I found my car, and was serious about buying it I first talked to both the sales staff, then the service manager regarding installation of aftermarket parts.
Here is some of the 'off the record discussion' with someone at my dealer;
This person said flat out, if the part causes an issue, they will not honor the warranty.
I was told that there was zero flexibility on aftermarket tunes (which was understandable).
BUT
I was told that (possibly) in light of the fact that GM offers a catback exhaust for all SS's except for the TC, that the MPX catback was "ok";
I was also told that the MPX cat'ed headpipe would be "ok"...
Now before I bought my car, I went back to that local dealer (which is really only concerned about selling Corvette's & Cadillac's) to see if they had the same stance and I maybe misinterpreted them previously - they didn't surprise me;
I was again told that if any of the parts I wanted were observed on my car I would loose my affected warranty period.


Another thing to think about:

There is a member here with a '08 SS/TC that bought their car used from a GM dealership, which still has a GM (extended??) warranty even though it clearly had an aftermarket intake installed.