This is a track only car. only used for track. How should i set it up after the header? just a pipe going out to the side ? silencer?

How do you guys have your exhaust setup thanks

 

depends if the tracks you go to have a db limit

 

Many tracks have noise limits. I recommend you setup your car with that in mind. Get an exhaust that doesn't exceeed 91 db and you will be good to go everywhere (I believe).

 

which brand exhaust are you guys usuing.?? I dont think the tracks i go to have noise limits because they are really really loud the cars. thanks

 

The typical setup usually involves just a short straight pipe from the header downpipe, a bullet style muffler and a turndown tip. So as long it exits behind the driver.

 

I'm actually in the process of doing the same thing. I know that the series in Ontario "recommends" dB limit not exceeding 103.

Anyway I have concerns over where to dump my exhaust under the car (DC2). I'll have a pipe exiting the header for about 5' then making a 90 degree turn to the passenger side and then dumping down. My question is how far from the gas tank can I comfortably have the exhaust exiting? Based on the scenario I outlined, the downturned exhaust tip will be about 6-8" from the tank. My other alternative is to do away with the 90 degree turn and simply dump it below and just behind where the main hoop is.

Thoughts?

 

Do you plan to carry an instructor? It can be very hard to hear each other even in a quiet car. An overly-loud exhaust can make it impossible. Just something to consider.

 

so just a straight pipe with a muffler at the end behind the driver sounds good.

 

why bother? i mean, yes its a track car, but youre not competing. so why try to optimize your exhaust? might as well take the time to port match, blueprint, dyno tune and so on your engine. obviously you wouldnt need to, so then you dont need to worry too much about exhaust setup. id just get the cheapest setup that would easily be within any sound limit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">so why try to optimize your exhaust? </TD></TR></TABLE>

Well if he's going to race later no sense doing it twice.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mityVR6 &raquo;</TD></TR><TR><TD CLASS="quote">Do you plan to carry an instructor? It can be very hard to hear each other even in a quiet car. An overly-loud exhaust can make it impossible. Just something to consider.</TD></TR></TABLE>

Yes. If this is the case you may want to get a communicator of some kind.

I agree -- go with the cheapest setup that will last and will keep you well within any track limits. That way you never have to worry about the exhaust again.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by quick6 &raquo;</TD></TR><TR><TD CLASS="quote">Yes. If this is the case you may want to get a communicator of some kind. </TD></TR></TABLE>

If the car has an exhaust just quiet enough to slip under the sound meter, then a communicator is going to be worthless - and your instructor will have a headache.

If you are carrying an instructor then use a street muffler.

 

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

Well if he's going to race later no sense doing it twice.</TD></TR></TABLE>
not quite. its not a matter of "racing", its a matter of being "competitive". if hes planning on "racing" then whatever he has will be fine. if he plans on being "competitive" then he will be definately be making his exhaust setup more than twice, along with all the engine goodies that make thinking about planning ahead now worthless and not really factor in being cost effective.

 

Think of the spectators!

Brian
-flipping the bird to any NA rotary powered race car

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .RJ &raquo;</TD></TR><TR><TD CLASS="quote">If the car has an exhaust just quiet enough to slip under the sound meter, then a communicator is going to be worthless - and your instructor will have a headache.

If you are carrying an instructor then use a street muffler.</TD></TR></TABLE>

I've used a communicator with stock exhaust to great effect. With no headache.

 

well since this is my only track car and i need to make an exhaust for my hybrid setup anyways i might as well do it right. of course seat time is important but i still need an exhaust setup. thanks for the inputs

 

Might be a stupid questions...but...are you going to be using that stock CX engine as listed in your signature? If so, you might as well just get a basic catback like a titanium Greddy or something, since I doubt you'll see much in terms of performance from a RFL exhaust on an all-motor D series.

 

no i have a b16 sir II now.

 

ive been running open header for over a month on the street, i havnt been able to do any organized events since b.c i know the car would get banned for being too loud... trust me when i say a small straight muffler on the downpipe would not lower the db by much and the fumes are noticable.

my suggestion is a full 2.5" straight pipe to an oval dynomax or magnaflow muffler in oem location, unless you are trailering the car everywhere.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by quick6 &raquo;</TD></TR><TR><TD CLASS="quote">Many tracks have noise limits. I recommend you setup your car with that in mind. Get an exhaust that doesn't exceeed 91 db and you will be good to go everywhere (I believe). </TD></TR></TABLE>

isnt that kinda quiet? cali has restrictions of 95db on the street....CALI

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSpimpTEC &raquo;</TD></TR><TR><TD CLASS="quote">isnt that kinda quiet? cali has restrictions of 95db on the street....CALI</TD></TR></TABLE>

Yes it is. ...because many tracks are located near residential areas.

For instance if you want to run at Laguna Seca you must have a 91db exhaust or less. They have a sound booth where they measure.

This is becoming more and more common around the country.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jsi &raquo;</TD></TR><TR><TD CLASS="quote">The typical setup usually involves just a short straight pipe from the header downpipe, a bullet style muffler and a turndown tip. So as long it exits behind the driver.</TD></TR></TABLE>

For a track car, in my opinion this is the best option. The bullet muffler (stainless 4" dia x 20" Magnaflow is about $50) takes the "sting" out of the exhaust note with very little added weight or restriction. It is actually quiet enough to drive around the neighborhood at low revs (hit high revs and it sounds like a big chainsaw!).

Pay attention to your ground clearance when selecting your header and exhaust! A mis-timed FIA curb hop or other off track obstacle will turn your $900 race header into a flattened pile of tubing suitable for garage wall decorating (I learned this the hard way).




Modified by Track rat at 11:49 AM 8/19/2004