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**98 3.8** · 06-06-2006, 09:41 AM

Re: More confused than ever.

1. It does not come with a cat.
2. Straight pipe is less expensive, and it will also add a little power. Straight pipe is a bit more "raspy" than using a cat. Most people don't consider this desirable.
3. Straight pipe OR hi flow cat will both make your computer throw a code and set off you "check engine" light. You can fix this by buying an 02 sim, $30. I got mine from www.zzperformance.com.
4. Hurry up and get it on! You'll be happy. :)

**96silvershark** · 06-07-2006, 12:19 AM

Re: More confused than ever.

dont do stright pipe i have it you will sound like a ricer with the 3 inch pipe put in a 3 inc highflow cat and be done with it you need some back presure

**98 3.8** · 06-07-2006, 09:29 AM

Re: More confused than ever.

Originally posted by 96silvershark

dont do stright pipe i have it you will sound like a ricer with the 3 inch pipe put in a 3 inc highflow cat and be done with it you need some back presure

Sound clip please. I'd like to hear a car with a straight pipe that sounds like a "ricer". The ones without cats that I've heard from our soundlips thread (you HAVE seen that, right?) sound pretty good.

**articacid** · 06-07-2006, 01:01 PM

Re: More confused than ever.

Originally posted by 96silvershark

dont do stright pipe i have it you will sound like a ricer with the 3 inch pipe put in a 3 inc highflow cat and be done with it you need some back presure

It always comes back to backpressure, if you have back pressure you have restriction, restriction=less flow=less power end of story.

I just recently swapped out my hi flow(it was busted), for a dynomax bullet, sounds better than ever, runs better too.

With a full 3 in exhuast, no cat no muffler, my car still makes more torque and hp than stock. the flowmaster set up might yeild a little more down low but has a lot less up top.

imo the best exhuast route for the power and money, and if sound is not realy a concern would be the tsp rumbler($199), make your own s-pipe(30 bucks shipped from jegs), a high flow cat($50 on ebay) or a bullet ($40ish)

total cost 270ish

as for a sim i would reccommend caspers, see the sticky at the top of the exhuast section.

**96silvershark** · 06-07-2006, 11:53 PM

Re: More confused than ever.

[QUOTE=98 3.8]Sound clip please. I'd like to hear a car with a straight pipe that sounds like a "ricer". The ones without cats that I've heard from our soundlips thread (you HAVE seen that, right?) sound pretty good.[/QUOTE
i get you a sound clip. 2 no v6 is ever not gunna soud not like a ricer ok its a v6 not a v8 when you hit the high rpms its gunna get hella raspy and a hiflow cat does not give you that much restriction and you need back pressure that makes rwq trust mea 3 inch pipe on a v6 sounds like a ricer wiht no cat

**99v6cam** · 06-08-2006, 02:14 AM

Re: More confused than ever.

A lot of people are in denial about our v6s. The higher pitched top end is just what a V6 sounds like. Get over it. Rasp? Rasp is a sound that is why different than just a ricer tone, it just sounds downright disgusting. At the very end of this video when I hit the brakes (i know the video/sound is off time wise) you will hear true rasp. http://www.youtube.com/watch?v=p0yuL28cQ1E

**99v6cam** · 06-08-2006, 02:21 AM

Re: More confused than ever.

Now, about the whole flow vs backpressure deal. Flow = horsepower. This does not mean you should run 5 inch exhaust! The air needs the piping to be the size to where it is big enough to flow very smoothly but not so big that it will spread, then cool while still in the exhaust which will cause turbulence and thereby ruining flow. Now, torque is horsepower incase you people didn't know. All horsepower is, is the result of an equation between current torque and rpms of the engine. When you drag race, you are in the low rpms for a very short period, this means that top end power is more important. This is why turbo cars still go fast in the 1/4 mile. It may take a bit to get the rpms to build boost but you can build boost at the line by reving your motor. If you have topend power on a regular motor you get power off the line by... REVING IT UP! Honestly people, it's not that hard to understand. (autoX and road racing are of course a totally different story)

**articacid** · 06-08-2006, 10:08 AM

Re: More confused than ever.

Originally posted by 99v6cam

Now, about the whole flow vs backpressure deal. Flow = horsepower. This does not mean you should run 5 inch exhaust! The air needs the piping to be the size to where it is big enough to flow very smoothly but not so big that it will spread, then cool while still in the exhaust which will cause turbulence and thereby ruining flow. Now, torque is horsepower incase you people didn't know. All horsepower is, is the result of an equation between current torque and rpms of the engine. When you drag race, you are in the low rpms for a very short period, this means that top end power is more important. This is why turbo cars still go fast in the 1/4 mile. It may take a bit to get the rpms to build boost but you can build boost at the line by reving your motor. If you have topend power on a regular motor you get power off the line by... REVING IT UP! Honestly people, it's not that hard to understand. (autoX and road racing are of course a totally different story)

Very right on the back pressure, glad to see there are people out there that get this, too!

Horsepower determines how fast a vehicle can travel. Torque determines how quickly that speed can be reached. They are very much related when you throw other variables in the mix, such as Bore & Stroke, transmission gearing, compression ratio, and advanced/retarded ignition timing. You can't make power with no HP and all torque, and you can't make power with all HP and no torque.

For a prime example, compare a Honda SI engine and a Mack Truck engine. The torqueless Honda will have no trouble out running the Mack Truck. But stick a trailer on that civic, and all of a sudden it sings a different tune.

Its hard to say that topend is more important low-end. Turbo cars generally are slower out of the hole compared to cars that have a torque advantage. As you know the launch is everything in the 1/4, and torque is a big part of that .while yes you can get it into the boost off the line, but traction becomes a big issue.

**99v6cam** · 06-08-2006, 11:23 AM

Re: More confused than ever.

I don't think you understood what I meant about the hp and torque thing. Horsepower is literally nonexistant. There's an equation...
torque*rpm
----------- = horsepower
5252
The torque and the rpm have to be the torque that is being made at that rpm. 5252 is a constant which... well I dunno how to explain it, someone did a writeup on this a long time ago I'll see if I can find it. Basically, if you look at a dyno graph your hp and torque should ALWAYS intersect at 5252rpms. This is how Hondas have so much horsepower and no torque (they rev really high). If you have 150 ft lbs of torque at 8000rpm then youre making 228hp. I'm rambling now, I'm gonna find that writeup.
EDIT: found it, it's a long read but it makes a lot of sense. http://vettenet.org/torquehp.html

**IDoVoodoo** · 06-12-2006, 03:59 PM

Re: More confused than ever.

You don't need back pressure, it's all about velocity! The cat is there to save the environment and you a huge fine. Just go high flow.

**slow6** · 06-12-2006, 05:54 PM

Re: More confused than ever.

if you dont have back pressure it will eventually burn the exhaust valves, is what I've heard.
EDIT: if you dont have back pressure, it will make your peak powerbands higher.
so you might not be making peak hp/tq until higher upper rpms (which you wont even reach because of weak
engine internals and rev limiters). Which would be no good for drag racing

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