Hey guys im running b16a crx and i want to put a full exhaust system on my car
Looking at upgrading the headers as a diy job what would ppl recommend (my exhaust system will prob be a 2&1/2")
much appreciated !!! :D
adam

 

If you are staying with a 1.6L best production flat out, Toda.

Making a header is not a DIY job.

 

if ur running a stock b16 u should not run piping larger that 2". ur loosing exhaust pressure. i know everyone will say that less back pressure the better but ive been doing alot of research for custom exhuast and ive come to a conclusion that a 2" exhuast is perfect for a stock motor with a good header, cat, and muffler she will sound very nice as well as she will perform

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tico &raquo;</TD></TR><TR><TD CLASS="quote">if ur running a stock b16 u should not run piping larger that 2". ur loosing exhaust pressure. i know everyone will say that less back pressure the better but ive been doing alot of research for custom exhuast and ive come to a conclusion that a 2" exhuast is perfect for a stock motor with a good header, cat, and muffler she will sound very nice as well as she will perform</TD></TR></TABLE>

You want high velocity, high capacity, and exhaust scavenging. Why in the hell would you want backpressure?

BTW, going to too big of a pipe decreases velocity, increasing backpressure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tico &raquo;</TD></TR><TR><TD CLASS="quote">if ur running a stock b16 u should not run piping larger that 2". ur loosing exhaust pressure. i know everyone will say that less back pressure the better but ive been doing alot of research for custom exhuast and ive come to a conclusion that a 2" exhuast is perfect for a stock motor with a good header, cat, and muffler she will sound very nice as well as she will perform</TD></TR></TABLE>


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

You want high velocity, high capacity, and exhaust scavenging. Why in the hell would you want backpressure?

BTW, going to too big of a pipe decreases velocity, increasing backpressure.</TD></TR></TABLE>

the bigger the pipe u have the less backpresure that your car has

 

fwiw im running a bone stock B16A with cheapo knockoff headers, 2" all the way back, no cat. i have a 2" thrush cherry bomb up front where the cat goes and a 2" magnaflow with no baffles in the rear. i forget the name of the magnaflow but its literally an oval glasspack with 2" preforated tube going thru it. slight bend but you can read thru the damn thing.

i pulled 138 at the wheel, and she sounds great.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dacrxguy &raquo;</TD></TR><TR><TD CLASS="quote">
the bigger the pipe u have the less backpresure that your car has </TD></TR></TABLE>

Go right ahead and explain to me why any restriction or reversion of exhaust gas back into your cylinder is a good idea.

And no, you actually create backpressure by moving to too large of a pipe. Increasing pipe diameter decreases velocity, It's a law in hydraulics, and it's a law in gasses as well.

So again, how is backpressure good?

 

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


the bigger the pipe u have the less backpresure that your car has </TD></TR></TABLE>

Wrong. Thats backwards ricer thinking.

gibsanez is right. a properly sized exhaust will get the exhaust gasses out as quickly as possible keeping them as hot as possible.

gibsanez

dacrxguy

 

A properly tuned exhaust system will also promote cylinder scavenging allowing for more air/fuel to enter the cylinder, thus creating more horsepower.

 

Where's one of our thermodynamics majors at? They usually have already chimed in by now.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 89s1 &raquo;</TD></TR><TR><TD CLASS="quote">

Wrong. Thats backwards ricer thinking.

gibsanez is right. a properly sized exhaust will get the exhaust gasses out as quickly as possible keeping them as hot as possible.

gibsanez

dacrxguy</TD></TR></TABLE> Yupper.

Tico, you are semi right 2" seems to be awesome for a mild b16 but let's all say it together kids, "Back Pressure is bad"

 

***$nyper im not planing on making my own headers im talking about installing them myself.
I also hear that 4-1 headers are generally good for high rpm power whereas 4-2-1 headers increase low-midrange torque (which is what a stock b16a needs)
of course it depends on the quality of header etc but i aint lookin at spending shitloads of money.....
thanks for everyones help!!