i have a crx b16a1 stock with stock b16 header, high flow cat and 17" resonator and dynomax super turbo muffler. right now i have 2" piping from header to axel were it goes to 2.25". if i replace the 2 inch piping from the collector back to the axel with 2.25 will it do anything? as far as SOUND and performance?

 

yes

 

I would definitely switch to 2.25", but i would also get rid of the resonator too.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MR5sARECOOL &raquo;</TD></TR><TR><TD CLASS="quote">I would definitely switch to 2.25", but i would also get rid of the resonator too.</TD></TR></TABLE>

Get the 2.25" piping. Removing the resonator will give the "bumble bee sound".

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eda6 hatch &raquo;</TD></TR><TR><TD CLASS="quote">

Get the 2.25" piping. Removing the resonator will give the "bumble bee sound". </TD></TR></TABLE>

it will also help with backpressure

 

do 2.25, itll sound way deeper,(better) and id hang on to the resy

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MR5sARECOOL &raquo;</TD></TR><TR><TD CLASS="quote">

it will also help with backpressure</TD></TR></TABLE>

The resonator has no effect on the backpressure of the exhaust as long as it is a straight-through design. With the angry-bee noise at all cost.

 

so it will make a noticeable difference?
well maybe this has been my problem the whole time!? i thought i had 2.25 but i just found out that its 2. i've been complaining that my car gets really loud at 3250 rpms, before and after those rpms it sounds good. maybe by switching to 2.25 it will help?

 

switching to 2 1/4 " piping will help free flow up..

 

get a turbo and go 3 inch.... thats a noticable difference

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by regime &raquo;</TD></TR><TR><TD CLASS="quote">get a turbo and go 3 inch.... thats a noticable difference </TD></TR></TABLE>

*pfft* NA 4.5" y0!

 

haha and feel all that torque that our hondas make =P hahhaha

 

will 2.25 give me any more torque?

 

Probably...at 7200 rpm.

If you want to go wild, get a 6" turbo diesel exhaust...

http://www.jegs.com//cgi-bin/n...r=361

 

well i don't have turbo and i sure as hell don't have a diesel. please quit giving me stupid answers. if you have good info please post

 

i guess i just want to know if its worth the money? will it give me noticeable increase in power?

 

???

 

any help?

 

youll loose some tourque by getting biger pipping.
the 2 inch is a real good sized exhaust if you dont plan on doing any major motor work.

but with the 2.25 youll gain top end

 

I was searching and I found this post. It might be useful to you.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxaddikt &raquo;</TD></TR><TR><TD CLASS="quote">

first off, i copied this from the magnaflow website :
"As a general rule, you can enlarge the pipe diameter of your OEM exhaust system by 1/4 to 1/2-inch to increase your horsepower. However, any additional increase in pipe diameter is likely to decrease your performance; specifically, low end torque."

Horsepower ---- MUFFLE INLET -------- / OUTLET
------------------- Single exhaust ---- / Dual exhaust
100 to 150 ----- 2" to 2-1/4" ----------- 2"

100 to 200 ----- 2-1/4" to 2-1/2"-------- 2" to 2-1/4"

150 to 250 ----- 2-1/2" to 3" ----------- 2" to 2-1/2"

200 to 350 ----- 2-1/2" to 3" ----------- 2-1/4" to 2-1/2"

</TD></TR></TABLE>

The basic knowledge of exhaust is that a smaller exhaust (with good flow) will give you that low end power/torque but lacks at the top end (where most hondas perform well at). A step bigger, lets say 3 inches, will give you top end but you will lose alot of the backpressure associated with low end power. The resonator doesn't make things quieter rather it changes the harmonics of the air flowing through it. I myself have a 2" cat back w/ high flow cat. Before I placed the resonator in, I had that annoying "bumble-bee" sound That's why I chose to install a 18" resonator (The bigger the resonator, the deeper the sound. Resonators do lose a bit of power because it is affecting the airflow but its really not that noticeable. In my opinion, I would rather have a deeper, more pleasing sound then for a extra 1 hp. (Its almost the same as running with no cat. An extra 1 hp for a loud obnoxious bumble bee sound and ruining the environment). Why most people say to go 2.25" is because the collector off the header usually is 2.25" and would make sense to have 2.25" all the way back. I really haven't noticed a difference (probaby because I have a small engine), maybe you will, but the whole concept is to make the air flow as smooth as possible. Also, some people opt for the +1/4" in size because of the many bends EF's have. its about 4 bends all they way back. There are posts about where people have an exhaust going straight out with one bend but I'll leave that up to you to research.

When it all comes down to it. You shouldn't need to use 3" for N/A unless you got some blang blang mods in your engine. Stick with the 2" - 2.25" for the sake of people not losing their hearing .

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Snapshift &raquo;</TD></TR><TR><TD CLASS="quote">For a non turbo ZC 2.1/4 and be done with it. You need low end torque for daily use. This diameter will provide you with the correct amount of back pressure for real world driving. Any bigger and you'll have to rev it out more for the car to pull off the bottom.</TD></TR></TABLE>

Reference: https://honda-tech.com/zerothread?id=978901

Hopefully that helps in someway. Good luck on your project

-Jon