I'm searching for a quiet exhaust for my 1998 accord EX sedan 4 cylinders.
But yet flow more than the stock one.
I heard the Es Oval from http://www.jhpusa.com is a quiet one.
Does anyone heard about it ?
Right now I have a full Greddy EVO cat-back system and it's too loud !!!! I even lost torque and low end.
Can someone tell me the right piping size for me.
Thanks a lot.

 

magnaflow or apexi ws

 

you will loose LE torque with wider piping......less backpressure + increased exhaust gas velocity = less LE torque.......

if u want quite, just got a custom setup w/ a good muffler (and a resonator if you like)......got w/ 2.5" or 60mm piping (which ever one is available/fits on the muffler)

BTW: the oval is just a muffler, no piping.......but you could throw that onto your evo piping......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hondaboytahiti &raquo;</TD></TR><TR><TD CLASS="quote">I'm searching for a quiet exhaust for my 1998 accord EX sedan 4 cylinders.
But yet flow more than the stock one.
I heard the Es Oval from http://www.jhpusa.com is a quiet one.
Does anyone heard about it ?
Right now I have a full Greddy EVO cat-back system and it's too loud !!!! I even lost torque and low end.
Can someone tell me the right piping size for me.
Thanks a lot. </TD></TR></TABLE>

If you are looking for low end, find a car with a bigger motor.

You either get power from a 4cyl with RPM or forced induction.

 

OT: nick, i see you took the suggestion, and threw the evil in front of it, bowhaha

turbo wont even give you LE tq, so you really cant make torque outa a 4cyl @ LE.....so id suggest buying a cummins turbo diseal pickup w/ double wide rear tires, and those mud flaps with the naked ladies on them

 

get an apexi ws. don't waste your time going custom and hoping it is quiet and sounds nice. apexi ws sounds great and is great quality at a pretty cheap price when compared to other name brand catbacks. it also performs very well too.

 

Yea i have Apex'i WS on my 6th gen accord. I can honestly say i'm more low profile with it. The polished muffler is a shiny bling effect, but the tip isnt huge, and the sound isnt loud, even in my town where cops have nothing better to do i'm not noticed. But at WOT, haha, boy....it sounds beautiful. It isnt ricey at all, it has a nice low growl, which I didnt expect

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accordselux &raquo;</TD></TR><TR><TD CLASS="quote">Yea i have Apex'i WS on my 6th gen accord. I can honestly say i'm more low profile with it. The polished muffler is a shiny bling effect, but the tip isnt huge, and the sound isnt loud, even in my town where cops have nothing better to do i'm not noticed. But at WOT, haha, boy....it sounds beautiful. It isnt ricey at all, it has a nice low growl, which I didnt expect</TD></TR></TABLE>

Sounds a lot like a stock 350Z, or G35, correct?

 

98-02 V6 exhaust, need to weld 3 inch of pipe tho'

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fw190bvi &raquo;</TD></TR><TR><TD CLASS="quote">
turbo wont even give you LE tq, so you really cant make torque outa a 4cyl @ LE.....so id suggest buying a cummins turbo diseal pickup w/ double wide rear tires, and those mud flaps with the naked ladies on them </TD></TR></TABLE>

i love my cummins, although it redlines at like 3.5 k, i just start her in second and go. first is for babies

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fw190bvi &raquo;</TD></TR><TR><TD CLASS="quote">
turbo wont even give you LE tq, so you really cant make torque outa a 4cyl @ LE.....so id suggest buying a cummins turbo diseal pickup w/ double wide rear tires, and those mud flaps with the naked ladies on them </TD></TR></TABLE>

mmmmm.....duelly turbo diesel....if only i could afford the gas

 

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

mmmmm.....duelly turbo diesel....if only i could afford the gas</TD></TR></TABLE>

lol i hope you dont put gas in there

 

Like they said, go with an APEXi WS or you could even get an HKS Dragger...they are quiet as well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Crono139 &raquo;</TD></TR><TR><TD CLASS="quote">Sounds a lot like a stock 350Z, or G35, correct?</TD></TR></TABLE>

My math teacher has a Z, next time he shows up at my house i'll let you know I'm not kidding haha, he will show up at my house. He's the coolest.

 

"turbo wont even give you LE tq, so you really cant make torque outa a 4cyl @ LE.....so id suggest buying a cummins turbo diseal pickup w/ double wide rear tires, and those mud flaps with the naked ladies on them "

Yeah... but will the damn thing fit in my 95 Accord!?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fw190bvi &raquo;</TD></TR><TR><TD CLASS="quote">you will loose LE torque with wider piping......less backpressure + increased exhaust gas velocity = less LE torque.......


</TD></TR></TABLE>

Huh? Still hanging onto that muscle car era myth, eh? Backpressure is baaaaaaad...there is no such thing as "good backpressure".

If you PROPERLY size the exhaust, backpressure will be very minimal and exhaust gas velocity will be perfectly fine. Only when you go too large in diameter does it hurt your performance....a properly sized exhaust will only yield you good things, and one of those good things is less backpressure.

 

actually backpressure can be good.... you should read up on the different theories about scavenging and everything. There are some good threads about it on v6p.net

 

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

Huh? Still hanging onto that muscle car era myth, eh? Backpressure is baaaaaaad...there is no such thing as "good backpressure".

If you PROPERLY size the exhaust, backpressure will be very minimal and exhaust gas velocity will be perfectly fine. Only when you go too large in diameter does it hurt your performance....a properly sized exhaust will only yield you good things, and one of those good things is less backpressure.

</TD></TR></TABLE>

i dont wanna have to get into the argument on wether backpressure is good or not....i believe it is, and have seen scientific evidence of it (though i cant quote anything, youll have to take my word on what i saw).......

simply put, quiet exhaust w/ little hassle as possible???......apexi WS (or WS II if u want stainless)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by swift535 &raquo;</TD></TR><TR><TD CLASS="quote">actually backpressure can be good.... you should read up on the different theories about scavenging and everything. There are some good threads about it on v6p.net</TD></TR></TABLE>

to say the least, yes.

you need some back pressure to draw exhaust fume out better.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iam7head &raquo;</TD></TR><TR><TD CLASS="quote">

to say the least, yes.

you need some back pressure to draw exhaust fume out better.
</TD></TR></TABLE>

Think about what you said...BACKpressure...it is going against the flow of exhaust fumes...YOU DO NOT WANT BACKPRESSURE....it is not good in ANY situation...you are confusing exhaust flow with backpressure iam7head.

 

"When high exhaust gas speeds are reached, a wake is created from an exhaust pulse leaving the cylinder head. Following behind this wake is a low pressure pulse that acts like a vacuum is created. This vacuum literally sucks in more fresh air and fuel at cam overlap, when the intake valve is just starting to open and the exhaust valve is almost about to close. Since both the intake & exhaust valves are partially open at this time of cam overlap, the header is actually "connected" to the intake manifold & intake port for a brief period. The exiting exhaust gas helps pull in the next fresh intake air & fuel. This is called scavenging. And scavenging is what helps draw in more oxygen and fuel for combustion.
3. Myth 3: I Need A Little Bit of backpressure For Midrange Power

THE MIGHTY BACKPRESSURE MYTH:

You want zero backpressure not some backpressure as you may sometimes hear from a salesman or an oldtimer domestic V8 hot rodder.

Stock backpressure is around 16 psi in a GSR. Good aftermarket exhausts yield 2-5 psi backpressure. "Bolt-ons only" engine packages, in the past, used exhausts with some backpressure, since there is this incorrect belief that having a little backpressure prevents the fresh air/fuel from shooting into the header at cam overlap (when both the opening intake valve & the closing exhaust valve are simultaneously, partially open). The backpressure supposedly "pushed" the fresh air/fuel back into the combustion chamber rather than having it go into the header. This shooting of fresh air/fuel from the intake manifold and intake port into the header cannot happen at cam overlap, since the pressure inside the header is already much higher than on the intake side , even when there is zero backpressure.

In reality, having more backpressure reduces the difference between the higher pressure in the head's exhaust port and lower pressure in the header and cat. You need this difference in pressure going from the head to the exhaust system or "pressure gradient" to keep the exhaust flow speed or energy at a high level. Having some backpressure during cam overlap and the exhaust stroke means that the exhaust gas must now push against something and therefore, this backwards force slows exhaust gas down.


<U>This need for backpressure no longer exists when you have a properly tuned (timed) engine and a good stepped header. In fact, increased backpressure may lead to backwards flow or "reversion", where the exhaust gas travels backwards into the combustion chamber and dilutes the fresh intake charge at cam overlap. At the very least, it slows exhaust flow velocity or energy and prevents the creation of a vacuum for scavenging.</U>

So please ignore the obsolete "you should have at least some backpressure" sales pitch. It's all about the creating high exhaust flow velocity/speed or energy leaving the exhaust port, in order for the header-cat-exhaust SYSTEM to do it's job properly (i.e. remove all the burnt exhaust gases and help pull in fresh intake charge by scavenging at cam overlap) and make power for you."

Credit given to Michael Delaney...this was pulled from his Advanced Exhaust Tech Article on Team-Integra.

 

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

My math teacher has a Z, next time he shows up at my house i'll let you know I'm not kidding haha, he will show up at my house. He's the coolest.</TD></TR></TABLE>

better watch his hands when he shows you how to patty cake

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by info101 &raquo;</TD></TR><TR><TD CLASS="quote">

better watch his hands when he shows you how to patty cake</TD></TR></TABLE>


I dont want to know what YOUR teachers taught you. Let me guess: Catholic School supressed memories?

lol, this Z was nose to nose with a vintage camaro that his brother owns- he was racing when most of us were in diapers