DcYo

Wanted to know real life experience.
lmk ure setups thx

K i l l a B e e.

iTrader: (3)

why would you do that.

LSTEG98

x2

99JDMHATCH

my friend does on his d1.5 but he's just starting over since his last car was stolen.

champLSinteg

I know a couple running stock exhaust but they have a cutout before the cat.

shifty35

I had a stock exhaust for a while on my Greddy 15g / D16Z6 setup. Made 140 whp at 5psi, lol.

frmdstryr

you can, I did it. Then I put a 2.5" exhaust on and my turbo spooled up like 1k sooner and i got so much more torque in the lower rpms it wasn't even funny.

TheShodan

iTrader: (14)

The purpose of a larger exhaust diameter is to alleviate back pressure in the exhaust stream. Up to a point, the larger, the better. After 3.5" for honda, there's no real reason for it.

Lsos

I put a B16 in my Civic and I was very unimpressed with whatever the supposed power gain was. This was with stock exhaust. Then I removed/switched the exhaust, and I swear to God it freed up like 40 horsepower.

That was a 1991 Civic Ex. And it was NA. Before I switched the exhaust, it was like I did almsot nothing. I imagine this being even more true when going turbo.

bamf3000

So 5 hp felt like 40? lol

Lsos

40 might be a slight exaggeration, but 5 is even more so. I went from high 16s to 15s simply by unbolting the exhaust. I'm no James Watt but I'm pretty sure it takes a little more than 5hp to do that.

I'm also not going to bust out my calculator, but I'm sure if you try to pump 160hp worth of air through a bottleneck meant for a civilized and economical ~100hp, you're going to lose a bit more than 5 of it...

Hybrid96EK

It takes VERY little to make changes to a 15 second car, much less a 16 second car. A cold air intake took my 99 si from 15.8 (completely stock) to 15.5. You would be surprised how little hp it takes to make changes on a car that slow.

EJ8 944

I had stock exhaust on a my D16Y5 about 2 years ago, I made 165 whp and 155 tq at 6 psi.

The quietness was nice, but spool was pretty slow for a 50 trim.

ludicrous

I run a stock ITR muffler with a custom 2.5 inch piping, made about 300 whp...don't remember the exact numbers but I have the graph at home. I chose a stock muffler so that I can stay under the radar with cops here in the bay area.

Set up
stock ls-vtec
Blox manifold
Gt-30r
on 7 psi

technine

I have one due to I'm smogging soon and the other exhaust I have has no cat (custom made). I feel a power loss and it does take longer to spool, but very quite. After I smog I'm putting the other one back on.

Ls_dx

iTrader: (5)

I <3 my 3" open DP