new exhaust set-up

right now my crx has 1 3/4" pipe, and i want to get some 2 1/4" put on. an added 1/2". is this a good idea? i talked with a guy from a muffler shop and he says he can do it for around $150 - maybe cheaper. he knew exactly how/why i wanted it, without even me having to explain it to him like i did with all the other dumbass shops i talked with. i plan on having all the bends made with the largest diameters that will fit under my car to allow for more flow, and then it will come straight out the back into a straight-flow muffler. the hardest part will be hanging it he said. so what do you think, will this help or hinder my acceleration?

2.25" is as large as you want to go. any larger and you will feel a serious loss in low end torque, you will feel a little loss with the 2.25" but the mid/top end power will make up for it. if you are still running with a manifold the noise level should be alright with just a glasspacked muffler however if yo ever decide to get a header it will make it quite loud and you may consider a second muffler or a cat/resonator or whatever to cut down the noise level a bit. this is what i discovered with my setup, straight pipe 2.25" with a glasspacked muffler was fine with the manifold but as soon as i put the header it was about 10 times louder at mid range rpm's and i couldn't stand it so i put a cherry bomb glass packed muffler right in the middle. it basically looks like a big resonator.

thanks, but won't a cherrybomb create too much turbulant air within the pipe causing a loss of power?

a charry bomb glass packed is one of the ones that you can see through unlike the cherry bomb turbo that the muscle car guys use. it may cause a little turbulence but not that much and i didn't notice any loss in power when i put mine in. besides, with a mostly stock motor (which i assume you have, you haven't mentioned any other mods) it's doubtful that you will notice either. the only reason i chose a cherry bomb was because it was compact and cheep.

i've got a cherrybomb glass-packed on there now as my muffler, so i want that gone. i've considered using it as the res but always wondered about the affect on flow. it even says it can be used as a res on the box. so what you're saying makes enough sense, i'll have to go with that. thanks.

well i have a custom 2.25 exhaust and it go straight back to flowmaster and then out to dual's and i also have the d16a1 but mine was loud and i don't have a header but when i get the header imma have to tone it done because i have already been pulled over for havin to loud of an exhaust. but also mine is strainght threw no cat so i might just ad a high flow cat to the setup. but good luck wit that man.

could i run a couple inches of pipe out of the manifold, then into a cherrybomb, then just pipe all the way to the back?

There are a couple different designs for "Cherry
Bomb" mufflers. The cheap style uses louvers inside it to catch sound and divert it into the fiberglass. A slightly better design uses perforations which will not cause as much back pressure.

But if you have an unmodified motor without a header, you can do whatever you want with the exhaust since nothing you do will give you a significant gain in power. It will however get you set up for when you do get a header.

To answer your question, you can mount the muffler off the end of the collector/down pipe then run pipe to the back of the car, or right out the side if you wanted to.

thanks, i'll definately run it out the back.