good point onimirage but i did hear from a good friend in the family who has his own shop if you plan on running higher hp numbers you will need a bigger exhaust to keep detonation down. also i heard if you want to run a 2.8 pulley or smaller it will become restricted as well. he told me go magnaflow 2.5 your safe either way.

 

i think most would be better off trying to get as high as possible and keep fine tuning the car as much as possible as well. if it becomes an issue ... sell it. SOMEONE will take it im sure of it

 

I get the feeling we either don't know or there are just lots of opionions (sp?) out there.

Basically I will be running the 2.9 pulley from the GM stage 3, then at best the GM head, peformance cams, cam gears and some titanium valve springs. When the warranty is up I will go with a 50-100 HP shot of nitrous *of course upgrade to the tires clutch and flywheel along the way. Hopefully be around 300-310 wheel HP.

So will GMPP touring be ok for this or do I need to go Corsa touring? I am keeping this car as street friendly and reliable as possible, so I'm trying to go all GM, along with going no higher than 310 or so to the wheels.

 

I am in the same exact boat actually. But I just got my tourin catback and GMPP manifold yesterday. I mean I still have at least 3 years of warranty left on the car. So when the warranty is done and I put a GMPP S3, I'll owrr about that then. Someone will buy your touring catback for sure. The touring seems a little more looked for as being sold used.

Calgary dude, your catback (touring) has been on back order for 3 months?? I ordered mine and got it a week and a half after and they didnt have it at the regional dispatch thing. They had to order it from the canadian distribution center in woodstock, ont. So I dont know whats the hold up for you??

 

seems to be the case but I think the gmpp should be fine. first one to 300 can prove all the bigger is better freaks wrong

 

Common sense should tell you that an engine putting out 130whp isnt going to gain 12whp.

if that were true, the 2.2 would be gaining almost 10% horsepower from a catback....
and the 2.0 SC engine would only gain 5%.

 

boy... 12 hp in 3rd gear..... not really anything to write home about.... neither is 208 stock in third..... hmm, i guess it gives a relative idea of what to expect.

 

each dyno in each city of each state is different. there are a huge amount of variables that come into play. what someone does in one area will never be exactly the same in another. the purpose of writing about it or even doing pulls is to establish a baseline to see where you are and how far you have come. comparisons are never an exact science but give you a general idea of what your car did at this time at this place in this condition.

 

Well just installed the (sport )GMPPcat back exhaust for $50 at Tuffy's and they welded the exhaust tip on for me. It is definatly louder that stock and kinda resembled the sound of my buddies SRT 4 Borla that he has on his. Highway speeds in fifth are quiet inside which I like but when yuo down shift into third it is really loud. I got mine from Crate engine for 448 with exhaust tip and tax and shipping. As far as hp I could not really feel the 12 hp that it claims that it puts out but maybe it just needs to break in. Next stop Ingalls TB .

 

How loud is it in the cab when in 3rd on the highway. How 'loud' is it as a daily driver, normal shifting and throttle on the street ect... any drone, does the sound beat you up? I know touring is my cup of tea, but if the sport is not abrasive it is cheaper

 

I got touring, deeper tone sounds awesome. I find the performance sounds almost stock (louder) where touring sounds deeper and meaner. For 100$, I thought of the attention it will bring a little less and how thats good when it comes to cops and driving around town!j
Just my 0.02 cents

 

Good point. Did you notice a 'seat of the pants' difference on your stage 2 after installing the GMPP Touring?

 

Also with the plugs in your siggy those are iridiums correct? With the gap and the 2.9 pulley did you use the GM hub, and GM stage kit tuning *Not trying to hijack the thread just asking a question while I clean out my PM box since it is full....sorry guys and gals*

 

I third gear on the highy way is real loud definatly louder than stock in the cab. Cruising around town you can definatly tell that you have something other than stock. I really have not gotten on it yet but it seemed to me that the seat of the pant feel is the same as stock. Just my thoughts.

 

what company makes the exhaust again? borla or corsa? sorry im braindead.

 

bump question above

 

borla

 

Well if ure talking the 12whp its GMPP that is made by borla. But the dyno #'s seem high IMO. But hey, the dyno on that car if its true talk for itself

 

I'm very curious myself if I'm going to see the 7-12 Wheel HP that folks are getting out of the GMPP Touring. We shall see.

 

cobaltSSilver do a before and after dyno pulls with the GMPP. Let us know how it works out!! Hope you see gains in the 7-12HP range. But i think they are inflated at those #'s

 

From what i have in my signature plus a 2.9, GMPP manifold, possibly a highflow cat, will i be alright with my GMPP performance exhaust?

If not i want to try and get rid of it now so there less miles on it!

 

i seriously believe you will be fine. ct has more mods than you or I and he has the gmpp too so if he hasn't had an issue I doubt anyone will have an issue. I say this can get you to 300whp with no issues

 

That's the idea....did you do any dyno pulls with your ride....before and after with the Stage 2, the smaller pulley, plugs ect....

 

NGK plugs....in your siggy, those are iridium correct.....any issues with it and the stage 2 with the exhaust?

 

i dont know, I think they arent iriduim? Wahts the difference?? I havent done a dyno pull with it, but I am poutting it stock GM S2 this spring and then going one by one witht he modd to see the HP diff with my Gtech pro. I know its not accurate, but it gives an ideal. But you with the real dyno would be more detailed