i put it in today and it justdoest feel all that faster. it seems like the rpms go up quicker and VTEC is LOUD AS HELL!!,,, it just kinda feels less torquy and less pull, evenat high rpm. could a exhaust leak result to this?
any1 else this happen to>?
heres whats on now(before install:apexi n-1, apexi intake, msd 8.5's.act fly an rps clutch

please help!

 

an exhaust leak could definitely be your problem. if you have one, you will definitely be slower. did you replace any of your gaskets?

 

Well for starters, your exhaust system is improperly matched up. You're going from 2.5" to 2.5" to 2.36". If you really want to harvest some gains, you'll want to get rid of that n1 exhaust and get another that is properly matched up with the rest of your system.

To test if there is an exhaust leak, jack up your car and turn it on. While it is running, put your hand around (but don't touch because it is hot!) the flanges to see if you feel any gases escaping out.

This might also be a case of misusing that unreliable, and deceptive, butt dyno!

 

yes a leak maybe a problem cuz we did have to do sort of a hack job!(****** carsound cat) anyways if i had a leak wich would cause backpressure, wouldnt that contribute to some low or midrange? my whole powerband feela kinda sloppy.

 

while that is true about reducing exhaust diameter, the car should STILL be faster. opening up the entire system to 2.5" would be best... but he shouldnt be slower with his current setup compared to stock header/cat.

i do agree about butt dynos being completely unreliable. i stepped up to jdm 4-1 and carsound cat from stock, and aside from a tiny bit more torque and throttle response i cant tell a "major difference." if i got myself up on a dyno, however, i know i'd see some decent gains.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by white_rice83 &raquo;</TD></TR><TR><TD CLASS="quote">Well for starters, your exhaust system is improperly matched up. You're going from 2.5" to 2.5" to 2.36". If you really want to harvest some gains, you'll want to get rid of that n1 exhaust and get another that is properly matched up with the rest of your system.

To test if there is an exhaust leak, jack up your car and turn it on. While it is running, put your hand around (but don't touch because it is hot!) the flanges to see if you feel any gases escaping out.

This might also be a case of misusing that unreliable, and deceptive, butt dyno!</TD></TR></TABLE>

 

well i can hear an exhaust leak gonna have to plug it up and see how iy feels after

 

It looks as if your engine is pretty much stock? besides I/H/E.

2.5inch header to cat is too big. Then going from 2.5 to 2.36 is causing back pressure.

 

No kidding, where do you plan on taking your car?

What is your power goal?

2.5" is pretty big for a bolt on integra.

 

Hey, me too. I put in a JDM ITR header and a 2.5 carsound cat over the winter. When I first drove it, it really didn't "feel" much faster to me either(but VTEC is now easily audible, it's so freakin sweet to hear that iish open up). Then I took it to the track, the h/c took a full half second off my quarter mile time. With AEM CAI and Apexi WS I ran a 15.8@90.5, now I run a 15.39@92.9 - both runs with identically crappy 60' times of 2.50 . The hinderance of going from 2.5/2.5/2.36 isn't going to be a big deal on an otherwise stock engine. It might cost you 1-2 peak HP, very minimal. But say you now want to add cams, it would be a good idea to then get a 2.5 exhaust, but for now your fine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JunIntegra &raquo;</TD></TR><TR><TD CLASS="quote">i put it in today and it justdoest feel all that faster. it seems like the rpms go up quicker and VTEC is LOUD AS HELL!!,,, it just kinda feels less torquy and less pull, evenat high rpm. could a exhaust leak result to this?
any1 else this happen to&gt;?
heres whats on now(before install:apexi n-1, apexi intake, msd 8.5's.act fly an rps clutch

please help!</TD></TR></TABLE>
not to be an *** but even if it's not "feeling" faster..if you say RPMs are climbing faster...then you're probably going/accellerating faster

 

i felt no low-mid range gains when i put header and cat in. but there was a definate gain in the top end.

 

Just because something doesn't "FEEL" faster, doesn't mean it's not. A Smoothened out Power Curve can feel slower than a rigid power graph thats making less power.

Butt Dyno's are bad...

 

well i do have leak. but i say it doesnt feel as fast cuz it isnt! when rpm's climb, i dont feel hardly apull like i did w/ stock header, its def. the leak

 

tuning may help u a whole whole bunch!!!!!!!! tuning is what makes the differance. and USDMDC2NH goin from 2.5/2.5/2.36 will make a bigger differance than 1-2hp. it might before he tunes it, but afterwards it would make a major differance.

 

i wouldn't worry about the n1 speaking from personal experience. I have a jg header w/ a import builder's modded collector to 2.5 inches w/ carsound cat and 2.5 inch piping w/ the n1. I felt a huge gain over dc 4-2-1 header after installation. At the track i ran w/ the jg header and n1 bolted up on the first run which i got a 15.1, then the second run i unbolted the n1 and ran a 14.9. I felt a differecne, everything was flowing very freely. Now you have the n1 like my setup, going w/ another exhaust w/ a 2.5 in diameter will probably give you a slight difference, but that won't solve your problem. I was thinking about getting another exhasut too, to match my piping, but after speaking to other people and going to the track, I knew it was gonna be a waste of money for another exhaust. just my 2 cents hope this help.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Skunk2nR &raquo;</TD></TR><TR><TD CLASS="quote">Just because something doesn't "FEEL" faster, doesn't mean it's not. A Smoothened out Power Curve can feel slower than a rigid power graph thats making less power.

Butt Dyno's are bad...</TD></TR></TABLE>
DEFINATELY AGREE!! when i had my R cams there was a big dip in power around 4-5 grand, so as soon as it hit 5500 or so it would kick your head back like omg power!

BUT when i put the skunks in, it was a gradual pull, it doesn't 'feel' faster, but i know that it is.

if you want proof, talk to gsr1z or neo1z or whatever the hell his name is. he just got his shiz tuned and his car just has linear power so theres no snapping of the head back ,just constant pressure holding you back. tuning is key.

put some cams in that thing and you should feel a better increase in the high end rpms.

 

would An exhaust leak cause a significant loss of power? cuz it seems that my whole powerband feels sluggish

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JunIntegra &raquo;</TD></TR><TR><TD CLASS="quote">would An exhaust leak cause a significant loss of power? cuz it seems that my whole powerband feels sluggish</TD></TR></TABLE>

Depending on where & how much you are leaking exhaust gases...YES!

GO to a muffler shop and have them look and if needed, weld the leaks if any!