hey guys
I am about to get a custom 3" exhaust from my y pipe on and I am wondering how loud is the exhaust (magnaflow) without a cat. If it is unbearable then I am gonna go with a High performance cat. I really don't want too much noise and rumble mainly bump my hp up and help myu SC flow better. How loud is is your setup?
thanx
Tay

 

Check out Iansw's comments: http://forums.maxima.org/showthread.php?t=303407

Cattman 3" Y-Pipe
Carsound 3" Cat
Mandrel Bent custom 3" B-pipe
Magnaflow 3" open muffler

"No resonators anywhere unless you count the muffler itslef as a resonator. Just a straight 3" mandrel B-Pipe.

It's loud as hell, and on a 1st gear run at high RPM, sounds pretty ricey, but in a nice deep tone kind of way.

But I don't like how loud it is. I'll probably go to another muffler soon and see if that helps (Dynomax Super Turbo, per Mardi's suggestion.)"

IanS

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Last edited by iansw : 04-18-2004 at 11:54 AM.

 

im also lookin for an 3inch exhaust whats the best one out there, i wanan get it for my max sc anybody can help me out

 

warpspeed is the easiest to get.

 

By reading the thread, it looks like he went from a stock diameter 2.25" b-pipe to a 3" b-pipe. I would not expect to see his types of gains if your already running the common 2.5" aftermarket b-pipe.

I have a question. I will have a 3" downpipe into a 2.5" catback. You turbo guys think that is too small for over 10psi?

 

yes if ur turbo 3" allll the way

 

where is the site for the warpspeed exhaust... I am still very undecisive about the exhaust system. u know i want an exhaust system that puts out maximum TQ/ HP without being loud. i.e. ppl want a " cheap turbosystem"...lol...guess i cant have both...but i will meet in the middle.

 

yes I agree that that is too 0small too I drove my car around with just the 2.5 down pipe for a coulple of days after I got the turbo on before I took the trip to town to get the exhaust work done. ok after getting the 2.5 done at only boosting 7psi it was like dam the power loss. So now I kick my self in the *** for getting 2.5 and not getting some manual bent stuff. So go with good 3inch you should be good.

 

at what psi is 3" for turbo really necessary?

 

so whats the best 3in exhaust to get for my sc

 

I've been thinking about getting this since they don't make one for the 5th gen and i don't want to deal with custom making one. I think this is better because you will not have the constant noiise issues and can have the power gains when you want. I like it because it is boost actuated and you can dial in when you want it to open based on type of driving you are doing http://www.atpturbo.com/root/releases/release091004.htm

Credit IceY2k1 for the find

 

i duno about that looks good

 

Having a larger diameter exhaust will lower EGTs, give more power while boosting and on turbo make it spool faster. I would go ahead and get the 3" full back. If you care about loudness then get a cat, at least one resonator, and stay away from magnaflow. I have heard good things about dynomax super turbo. The warpseed seems to be a good option. I wonder why they don't make a 5th gen 3" exhaust yet.

 

My thought, which are probably flawed, is that the most important place to have 3" is right right after the exhaust manifolds. My set up will be 3" madrel bent all the way to the cat. I am then going to add a 3" test pipe but keep my 2.5" Greddy SP2. I would think that would be sufficient.

 

give me attention

 

Man im in a jam, I too want to get a good exhaust. Something that sounds good, preferably the Greddy SP2.. however, if i want to go turbo later down the road, i will need to upgrade to 3". Is there any way i can chance to 3" with the sound similiar to a greddy and not too ricey?

 

You will be severly down on power w/ a 3" on an N/A car.

 

i think its the evos that run the mufflers with the variable muffler like the 2000+ mufflers. Now are any of the boosted people running the 2k mufflers? The flow decreased that much from like a dynomax? I think i also read that someone with a super charger was running a 2k muffler and his exhaust kept eating the mufflers. Anyone know what happened to him and was it the exhaust causing the problems or maybe just crappy old mufflers?

 

I am SC'd and i have the stock 2000 muffler on. Sounds great with 2.5"wsp bpipe. I don't know about long term problems yet because i have had it for only 3 months. I don't see how it would f### up the muffler unless he was ******* the hell out of his car constantly causing excessive egt's

 

Is this true? I thought the whole idea was bigger=better for performance. Can anyone else confirm this?

 

This is very true. You want a good non-restrictive exhaust. The basic rule of thumb is 1"/100 HP. A heavily moddified 4th gen might make 250 flywheel HP. Once you go bigger you start reducing exhaust velocity which reduces power. I will exagerate by saying the engine needs to have the exhaust sucked out rather than pushed out. A high exhaust velocity helps this situation to occur. Thats is why the old Greddy SP was 2.38" rather than 2.5". They know that most of their customers aren't going to have a very built N/A car so they wanted to maximize the gains for you average bolt-on Joe.

 

Actually, I had a Warpspeed 2.5" B-Pipe with no resonator before, and Warpspeed Y-Pipe/Stillen Muffler.

So before the 3", I was 2.5"

So yes - you should expect similar gains.

The Dyno is getting a red x right now due to the fact that it did not get copied over to my new host for some reason.

I'll copy it over when I get home.

IanS

 

There no more red x.

 

Ok, thanks.

I read this list as meaning you just had the b-pipe "fix" that replaces the crush bend with a stock diameter uncrushed piping, not a full b-pipe.

First Run:
WSP Y-Pipe
WSP Straight Pipe
WSP B-Pipe "fix"
Stillen Muffler

A 3" cattman y-pipe could not have been cheap, must have cost as much as their headers.

What I was alluding to was that I was hoping to get away with not having to run a 3" cat back. My thinking is that I will have 3" throughout the exhaust system until a 2.5" mandrel bent catback. I thought the further away from the motor the less important it is to have larger diameter piping that boosted cars need. It may actually be beneficial because as the exhaust loses heat the diameter will become smaller keeping the velocity high.

In other words....3" down pipe and 2.5" catback > 2.5" down pipe and 3" catback

 

Hey ian!!!
thanx for the info.
So how is your new muffler sounding? Did u change out the muffler? Is it quieter?

 

I think putting any restriciton anywhere in the pipe will cause problems. The air doesn't cool all that much as I understand it. At least not enough for it to retract 1/2" in volume.

I actually had pasted the specs from another older post. In-between them I had put in the 2.5" B-Pipe. My bad.

 

anyone heard a borla muffler on a 5.5th gen

 

How about a 3" turboback > a 3" downpipe to a 2.5" catback?

 

thats what i30tmiked has right now and he has limited boost. brad92se has something similar, but he has a 3" cutout where the cat would be so its less restrictive.