would this create ne power at all? would it b good for the engine?
does ne body on here run a 2" pipe front to back on there 1.5L, ps. i have the intake and axel back exhaust so far..

 

A little...opening the intake and exhaust paths will always create horsepower. Nothing worth getting excited about though.

 

but this would also create less back pressure, am i right?

 

Oh God, not again...

"Scavenging." Look it up. It doesn't matter if you don't have any backpressure. Your engine does not need it. Too big of an exhaust will actually hurt you not because of loss of backpressure, but because it creates stagnant air that can't escape quickly. You need an exhaust that "scavenges" and "sucks" the air out quickly, so to speak. A properly tuned exhaust will do that.

 

haha where is maverick. he will tell u if it is too big "it will damage ur valves" what a tool

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">Oh God, not again...

"Scavenging." Look it up. It doesn't matter if you don't have any backpressure. Your engine does not need it. Too big of an exhaust will actually hurt you not because of loss of backpressure, but because it creates stagnant air that can't escape quickly. You need an exhaust that "scavenges" and "sucks" the air out quickly, so to speak. A properly tuned exhaust will do that.</TD></TR></TABLE>the famous "I need back pressure"

 

k well it was my buddy that told me u need back pressure i didnt really believe him that much and i think i will run the 2" pipe and see how it is, if not ill jus go back to stock....thx guys

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by y-49 &raquo;</TD></TR><TR><TD CLASS="quote">haha where is maverick. he will tell u if it is too big "it will damage ur valves" what a tool </TD></TR></TABLE>hahahhahaha that made me laugh

 

i thought stock honda exhaust piping we're all 2"

i would recommend 2.25"

2.5" for 180+ hp car
3.0" for turbo'd 200+ hp cars

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92integra_gs &raquo;</TD></TR><TR><TD CLASS="quote">i thought stock honda exhaust piping we're all 2"</TD></TR></TABLE>

Mine was 1.75".

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by y-49 &raquo;</TD></TR><TR><TD CLASS="quote">haha where is maverick. he will tell u if it is too big "it will damage ur valves" what a tool </TD></TR></TABLE>

i started that thread, it went downhill fast.

 

ahhh let me get that screen name " mc flurry" **** is hard.

 

2 inch ID is damn near ideal for a 1.5L NA. They typically measure exhaust piping by OD though, and depending on the thickness, you probably want to ask for 2.25.

If you go too large, you may gain some slight peak hp, but the powerband as a whole will suffer. Larger even still and you'll lose more power.

 

My experience is that a 2" exhaust hurts everyday power on the regular D15s. I took a GReddy SP off of my woman's car and put a stock Si exhaust on it. Made a huge difference in everyday driving. The ***-dyno was most pleased.

 

Whenever someone says their car won't turn over, someone always chimes in with the "are you running open header? If so, you don't have enough backpressure to start the car"

I started my car like 10 times open header when we first swapped, and it fired right up.

Honda-Tech is the capital of the interents for mis-information.

 

Might aswell get 2.25 just so you're ready if you ever swap motors and won't have to change your whole exhaust system again.

When I got my DX, the resonator rusted off and I had to get a whole new "middle" piece or whatever it's called that has the resonator. For some reason it had 2" piping all up until the last bend then it shrinks into the puny stock size for the axleback. I took off the axleback just to see how it'd run and it felt like it had faster response but it was wayyy too loud for my tastes.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93cavRS &raquo;</TD></TR><TR><TD CLASS="quote">would this create ne power at all? would it b good for the engine?
does ne body on here run a 2" pipe front to back on there 1.5L, ps. i have the intake and axel back exhaust so far..
</TD></TR></TABLE>

I would not think a two inch exhaust would make much, if any difference, on a bone-stock 1.5 liter. The DPFI is the bottleneck on that motor. And freeing up the sxhaust is not going to help matters any in terms of performance. But it shouldn't hurt anything, either.

 

Like I said. I have a '90 DX hatch and a '91 Si hatch. The DX is bone stock except for the GReddy SP that was on it when I bought it. I took that off to put on my Si after my swap and with the stock Si exhaust the DX felt immediately more responsive in the low and medium RPM range, were most people drive. It may have lost 1 or 2 peak hp but drivability is considerably better and this little bastard almost never sees high rpm anyway.

Look into a motor swap first and then get a complimentary exhuast.

 

whenever I throw my OBX muffler on (i have interchangable mufflers, one quiet and one for race) my car feels a bit smoother to drive. I dunno why.

I have noticed that there is ALOT more torque down low now, I am able to make up distance lost from people who get the ricer jump on me much easier now.

I also love hearing my intake.

loud intake &gt; loud exhaust

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 31flavorscivic &raquo;</TD></TR><TR><TD CLASS="quote">
loud intake &gt; loud exhaust</TD></TR></TABLE>

Tru dat!