Is there any performance difference between the apexi n1 and apexi ws both with pipping from the cat back of 2.25
tia

 

I would say it's negligable, unless you're boosted and have the N1 turbo muff against the WS.....

 

thanks for input

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LudeyKrus &raquo;</TD></TR><TR><TD CLASS="quote">I would say it's negligable, unless you're boosted and have the N1 turbo muff against the WS.....</TD></TR></TABLE>

do you think that a custom 2.5 in n1 system w/o a cat would
be good for forced induction?

 

isnt 2.25 best for N/A?????

 

2.25-2.5 is good for n/a, I believe the gurus from a LONG time ago agreed that 2.25 is great for most modded H22's....

I think a 2.5 straight-thru w/ no cat would be alright for turbo, it would be much better than the stock exhaust. I would also go 3" if turbo, but from what I recall, there are no downpipes bigger than 2.75" for the 4th gen's.

 

there arent any bigger downpipes than 2.5s for ludes, so there is no point to run a 3" full exhaust, if u run a 2.5 u are good...that is what i am soon going to run with a universal N1 muffler.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by makavelli1227 &raquo;</TD></TR><TR><TD CLASS="quote">there arent any bigger downpipes than 2.5s for ludes, so there is no point to run a 3" full exhaust, if u run a 2.5 u are good...that is what i am soon going to run with a universal N1 muffler.</TD></TR></TABLE>
hmmmm.........i thought that if your exhaust gets bigger the farther
back, that was better for turbo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SKDRCR &raquo;</TD></TR><TR><TD CLASS="quote">
hmmmm.........i thought that if your exhaust gets bigger the farther
back, that was better for turbo </TD></TR></TABLE>

No, it doesnt matter for turbo, all you want is free flow exhaust pipe, Turbo back.


for NA application, WS do have more resonating muffler material=less noise but more restriction.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FalconMan &raquo;</TD></TR><TR><TD CLASS="quote">isnt 2.25 best for N/A?????</TD></TR></TABLE>

depends what type of setup, you could have i/h/e and you can get away from 2.25, 2.5 is not too big for heavily modded NA

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BolivianFuego &raquo;</TD></TR><TR><TD CLASS="quote">
IMO that would be optimal for a n/a car, but for a car with force induction i would think that a 3inch custom exhaust would out do a 2.5inch one.</TD></TR></TABLE>

you should definitely go with 3" if your going forced induction.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dankbudz11357 &raquo;</TD></TR><TR><TD CLASS="quote">

you should definitely go with 3" if your going forced induction.</TD></TR></TABLE>

but y, when your DP is only 2.5 or 2.75...that will cause a tide like problem with your exhaust gasses.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BolivianFuego &raquo;</TD></TR><TR><TD CLASS="quote">IMO back pressure is a myth. Thats why you could always pull off a better time at the track running open header compared to like having an exhaust on.</TD></TR></TABLE>

It's not though. Well, it kind of is. Backpressure is important, but the biggest thing is VELOCITY. You want to have the highest velocity possible w/ no backpressure at your motor's powerband.

Running open header allows for only one part of the exhaust system to be a restriction: the header. The fact is that most of the time the header is the bottleneck on a car anyways. This is why most big power gains that are made on a Prelude are on headers w/ 2.5" collectors, or w/ another header that's modded w/ a bigger collector.