Spooled1.6L

Just wondering if it has any benefits or downfalls?

intekragsr

benefits? FAST TURBO SPOOL! POWER!

downsides? none. maybe bad smell? but who cares!

PM-Performance

i lost hp on the dyno with mine open at low boost.

austrian type-R

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 &raquo;</TD></TR><TR><TD CLASS="quote">i lost hp on the dyno with mine open at low boost. </TD></TR></TABLE>

CheezeFrog

Chalk that one up to bad tuning. st00pid was tuning a B18C5 and got something like 26whp on an open downpipe vs. GReddy EVO exhaust, back to back runs, nothing else changed.

Distorted

turbo's need to flow, the more you let them flow, the faster you will go.

JAY

the difference is amazing from a 2 1/4'' exhaust to an open DP

its just supa loud

MachAF

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JAY &raquo;</TD></TR><TR><TD CLASS="quote">the difference is amazing from a 2 1/4'' exhaust to an open DP

its just supa loud</TD></TR></TABLE>

exactly. My car hauled *** before i put a down pipe on it. now its slow . It doesn't pull near as hard.

done

youll get a little light headed...

sneakypete

Would there be any significant hp gains of running an open dp compared to a 3 inch exhaust?

Quad-Damag

open downpipe = dirty as **** underbody

b18bcx

could open downpipe cause boost spikes?

PureTeg420

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18bcx &raquo;</TD></TR><TR><TD CLASS="quote">could open downpipe cause boost spikes?</TD></TR></TABLE>

Yep, especially with a poorly designed manifold.

TTWS6

what about with a drag 3 manifold for a gsr?

TTWS6

ttt

FredoSP

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18bcx &raquo;</TD></TR><TR><TD CLASS="quote">could open downpipe cause boost spikes?</TD></TR></TABLE>

18G

LiLOtaku

so what about running no downpipe on the turbo. wouldn't this be the least restrictive?

The only thing about this is, I heard that you can actually "overspin" a turbo and damage it.

Deltax75

If your turbo is anywhere near where mine and most others are, running no downpipe will melt some **** in the engine bay. As far as the turbo "over-spinning" thats why there's a wastegate.
-Mike

ion_four

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Deltax75 &raquo;</TD></TR><TR><TD CLASS="quote">If your turbo is anywhere near where mine and most others are, running no downpipe will melt some **** in the engine bay. As far as the turbo "over-spinning" thats why there's a wastegate.
-Mike</TD></TR></TABLE>

Besides, depending on how your turbo is set up, you need someplace to attach the o2 sensor so that the OUTSIDE is not exposed to the exhaust gases(it has an air reference port(s)). I learned this the hard way and killed my new $90 sensor.

tony1

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CheezeFrog &raquo;</TD></TR><TR><TD CLASS="quote">Chalk that one up to bad tuning. st00pid was tuning a B18C5 and got something like 26whp on an open downpipe vs. GReddy EVO exhaust, back to back runs, nothing else changed.</TD></TR></TABLE>

I did the same thing with felix's car from VSV. He picked up almost 40whp by dropping the greddy sp exhaust! Went from 260 to right under 300whp! Restriction after a turbo is bad! Be careful though, most cars will run lean if you drop the exhaust and pick up power. If you do it, make sure you have a wideband on it and are ready to add some fuel up top!

93LSivic

Im wondering when boosted hybrid is gonna jump in here.......i believe he is the "bad tuner" of pete's R. He is a good tuner I know that for sure, so something must be up. Pete maybe you leaned out real bad and thats when your ringlands went to ****

boosted hybrid

Pete retuned his car by himself on the dyno after I had tuned the car. The previous tuning that I did on the car was lost since my old laptop's harddrive went on me. It was tuning, and open downpipe will always make more power than with an exhaust. The pressure generated back onto the turbine blade doesnt allow for the turbo shaft to direct maximum amount of work to be generated onto the compressor blade. When the restriction is gone, and only atmospheric pressure is the restriction the maximum amount of work can be done onto the compressor. Power is generated through compressor speed, so the faster the speed the more power.

Flamenco-T

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">

I did the same thing with felix's car from VSV. He picked up almost 40whp by dropping the greddy sp exhaust! Went from 260 to right under 300whp! Restriction after a turbo is bad! Be careful though, most cars will run lean if you drop the exhaust and pick up power. If you do it, make sure you have a wideband on it and are ready to add some fuel up top!</TD></TR></TABLE>

felix had my old exhaust, I dynoed at 256 hp at 6.5psi with that exhaust almost 2 years ago, wonder how I would do had I gotten a 3" then.

stan

Trac226

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

Besides, depending on how your turbo is set up, you need someplace to attach the o2 sensor so that the OUTSIDE is not exposed to the exhaust gases(it has an air reference port(s)). I learned this the hard way and killed my new $90 sensor. </TD></TR></TABLE>

Yeah, so what do you guys do with your primary o2 sensors? Just leave it plugged in at the end of the downpipe?