hey, so today i was just at a shop putting in a cherrybomb glasspack (bigger dimensions than stock exhaust), its slightly bigger than the stock exhaust, this one has a inlet of 2.5 and an outlet of 2.5 as opposed to the 2 1/4" of the stock muffler. so half way putting it in, i started a conversation with a mechanic there and he started rambling to me about how by putting on the bigger straighter design, im losing a large amount of fuel economy and that i am losing ALOT of horsepower, he then started suggesting all these other mufflers. i became very distraught and now am worried if i have lost all that power and fuel economy... any inputs? (i only put this in temporarily because i eventually want to replace the whole exhaust system)

 

lmao................. no

 

haha could you elaborate?

thanks

 

Simply put, hes an idiot. sure if you put a 3 inch full exhaust with no mufflers, you would lose some performance down low but swapping out a muffler wont hurt anything, especially 2.5 inch. Most aftermarket exhausts are 2.5 inch for these cars

 

Having a glasspack in place of your stock muffler is a bad idea because its gunna make your car very loud and yes your gunna loose low end tq and hp. You should chop that off right now and buy this muffler. You can also get this muffler from speedy muffler thats where I bought my dynomax muffler from. Also what other mods do you have?

Dynomax Performance 17733 - Dynomax Super Turbo Mufflers - Overview - SummitRacing.com

 

hes an idiot, it wont hurt performance since most exhausts are 2.5" for cobalts anyways, 3" is overkill

 

so im getting a bit confused because i guess some people seem to think it wont change anything and some people say i will lose power, i also considered the cherrybomb turbo, but theyre 2 1/4" and i heard theyre not very loud at all. so if im losing power and MPG am i losing a significant amount?

 

i just bought my car 5 months ago so im still enw to this cobalt i lvoe it though, so far my mods are K&N typhoon SRI, and the cherrybomb glasspack (2.5", 2.5", 29") w/ ss 3" tip, for performance, and nokya 7000k/55w halogen bulbs & carbon fibre 3 pc spoiler. i heard bigger fuel injectors are a good investments. any suggestions on what i should mod next?

 

your losing nothing..but gaining sound. Thats all

 

the loss of gas mileage will be negligible. i really dont even think youll have any loss in mileage. i ran my balt open downpipe for a while because i gimped up my catback. dont think i lost any mileage to tell you the truth

 

sweet thats awesome, good to know my car isnt going to lose anything, and ya i really only got it for the sound, got the longer one so it doesnt sound too ricey :P but ya i guess that mechanic guy just really scared me lol

 

Why not just take the exhaust off and run open downpipe? That should give you sound.

 

^^horrible idea. i know from experience

 

wow. a whole 1/4 inch difference?

it'll just be louder, whoever tells you, you will lose gas mileage and power is an idiot PERIOD.

 

what about this myth about back pressure, the mechanic told me that by getting rid of back pressure im actually making my car worse

 

my exhaust shop told me my catless downpipe and flow through muffler would kill my turbo due to lack of backpressure. I asked them If they ever worked on a turbo car. They said no. I just laughed and told them to install it anyways.

 

omg another backpressure debate. It has everything to do with flow velocity, and how combustion works.



If you replace with a bigger muffler (bigger inlet and outlet) than it doesn't effect your performance as much if you replaced say the beginning of a cat-back and dp. the harder the piston needs to push out the exhaust the harder it comes down, if you think about it, it makes total sense on how it would effect your high and low end power.

OP you are fine stop being scared by homos

 

Whys that? Lol

 

read 2 posts above your last post

 

i hate cobalt owners. THEY ARE SO STUPID.

 

 

I understand that. Whats the point of a cutout then? At least on stock turbo cars.

Just trying to learn dont hate.

 

op has a 2.4. would sound horrible. thats all i was saying. ill completely agree on a cutout for a tc though

 

The muffler will not effect anything. Nothing at all. Zero difference besides being obnoxiously loud. You still have a 2 1/4 exhaust. You *may* have increased your exhaust flow by a VERY small amount, but it isn't going to be enough to change backpressure enough to effect anything.

 

I had a similar situation with a "mechanic" friend. He told me to stop putting premium gas in my 2.4 because he said it was designed for 87 only (despite the fact that I told him I felt a difference). Turns out the manual said the exact opposite of what he said. Lesson I learned: sometimes the best judge is yourself (and sometimes the manual.)