I'm still at 2.25" because I like the noise level at stock. Since I'll be putting in the 3.125" pulley this summer its time for me to free up some hp and go with a larger diameter piping. My main priority is to keep as close to the stock noise as possible but with the Budget Y-pipe I know that the level will be higher. I also know that Iansw has gone 3" but he said that its hella loud without the resonator. I'm curious as to what configuration the rest of you SC owners have.

 

i am running a regular WSP y-pipe and that is only modification to the exhaust i have. i would like to free up the power, but the noise level for me is top priority. not to mention the sleeper look with the stock muffler.

--Paul

 

Hi Paul

Have you had a chance to dyno yet?

 

3 inch exhaust


BTW ever think about a cutout?

I am thinking of putting the stock exhaust back on and getting a manual cutout

 

You mean like this? Wouldn't that be stupid loud?
http://www.jcwhitney.com/webapp/wcs/...&storeId=10101

 

exactly


Yes, but you control when it's loud and when it's not....

 

3" Cattman Y
3" Carsound Cat
3" Mandrel bent B-Pipe
3" Magnaflow Muffler

I'll be putting this in soon to try and quieten it down some:



If that doesn't help, I'll be going to a Dynomax 3" Super Turbo Muffler - as Mardisgrasmax has suggested.

 

If you think a moderate amount of noise is reasonable, and you want the MOST horsepower out of your exhaust that you can possibly get, go 3", or cutout. I'm running 2.5", you've heard my car, it's noisey as hell with the stillen fartcan on there.

It's a little bit louder than when you took a ride in it, but not much. I think I was still running ~230ish fwhp when I last saw you up here. If that was the case, I replaced the catalytic converter with a straight pipe, and changed the stock b-pipe to a budget. There was a HUGE kink in my b-pipe, and it resulted to nearly 40fwhp (269 corrected / 272 uncorrected) Those gains were pretty rediculous but it looked like someone had taken my b-pipe through a crimping iron or something.

If you're still going stock, I'd seriously look at a cutout. All the horsepower you need, and all the stock noise you need too.

 

I have a 3 inch exhaust with a cat and resonator and its pretty quiet.

The trade off is a big loss in horsepower though.

 

Is that a perforated core, or louvered(sp) core?

 

What do you mean?

Loss in hp from the resonator and Cat? Or because of the 3" exhaust?

 

Like this:



I guess that would be "louvered"?

it was only $50.00 - so if it hurts power more than say 5-8hp, I'll get rid of it.

 

Resonator and cat.

 

That's pretty much the same exhaust setup I have. And you ran a 12.9? Very interesting.

I really like the quietness with the stock muffler, too, but I would be willing to put up with maybe a little more exhaust noise.

 

I'm just trying to imagine what the noise would be like with the cutout...

 

LoL! Man, all I remember was the noise level of your V1 in the hotel parking lot!

Btw I'll be coming out to T.O. again for a week sometime this summer!

 

Ever hear a mustang/camaro with open headers?

It will be a different sound, but almost as loud.

A buddy with a SC'd IS300 put it on his car. He can't hear himself think when it's open.

But nice and quiet when it's closed.

 

Can't say that I've heard a mustang/camaro with open headers in this city.

Mind you, when I go autoX I'm sure it would turn everyone's head with the cutout open!

After looking at that pic would the exhaust gases escape through both the cutout and the muffler or mainly through the cutout?

 

I remember reading that one org member had electric cutouts, and he would just barely crack them open to add a nice burble to his otherwise quiet exhaust system when driving around town.

I have this wild idea about having the cutouts controlled by an rpm switch so that they start out closed and would open when you hit a certain rpm, maybe at the same time the MEVI opens. That would be kind of a shock to whoever you're racing. That would only work if the solenoid controlling the cutout was fairly quick acting.

 

I just switched from the Magnaflow muffler to the Dynomax last night. It is SOOO much quieter. I have (had) a resonater with both, and the Magnaflow muffler was still crazy loud.

 

yup 12.9 with the stock exhaust minus the y-pipe. the only real sound coming off my car is the V1 screaming. even when i am WOT i dont hear the exhaust at all, just the engine. there is no doubt that with a 2.5-3.0 inch exhaust i could pick up power in the neighborhood of 30-35hp, but its really not for me. i would put on a 2.87 before i pulled the exhaust off.

for blackcat, i have not gotten to the dyno with the JWT/370s and full boost in the car. i dyno'd with the stock ecu, stock injectors, and only getting 6psi (belt not fully tightened) and layed down 286hp/260tq. since then with the ECU and injectors and 10-11psi the car feels MUCH better. i will probably get to the dyno in the fall once the weather cools.

--Paul

 

I can speak about cutouts on Maximas. I have one in right now installed in a straight pipe, and I'm waiting to get my electric valve installed so I can control it from the interior. I opened up mine once or twice manually so far and yeah....you really can't even think it's so damn loud. It sounds cool at idle but when you punch it, it gets rediculous. I might be able to post some videos up when it's finished up.

 

I found out that our province doesn't allow cutouts while going in for the annual emissions checkup so that's not an option any more. Now I know why every time I go in they always check my piping with a mirror.

 

at what throttle point is this cut out switched? thats the thing about this. Sometimes i want to go fast but not be loud. Just to catch a light or something. if throttle was in middle then i would be loud most of the time.

 

It's controlled by the driver with an electric switch. You don't have to open it if you want to stay quiet.

 

how much is that cut out

 

I have a Custom Mandrel Bent exhaust set-up, with a Carsound Cat and a Blitz Nur-spec 80mm Muffler. It is hella loud as everyone has heard. I am gonna be getting a resonator very shortly to hear what it does. If it takes away some power to bring the noise level down, then that is ok with me.....as I am going deaf lol....

 

It would be cool if the cutout could somehow be hooked up to a WOT switch. That way it could be closed and quiet when you're just cruising, but open up when you're looking for maximum accelleration. Although you'd probably have to rig some sort of delay so it doesn't momentarily close when you're shifting gears.

 

Prolly too late but I'll chime in for posterity... I have a 3.1 pulley and I'm running a full 2.5" exhaust, Budget Y, Budget B with resonator, Hiflow cat and 2002 muffler. I ran without the res for a month or two, I couldn't stand the drone so I had it installed. Sounds super quiet now IMO. I also have a cutout mounted after the res. IMO (again), it sounds SICK when uncorked.

D

 

Has anyone mounted the electronic controller? (skimmed the posts and didn't see anyone saying they have... my apologies if I missed some) I have been up and down that exhaust system looking for a spot to install it. I have one but I could only mount the cutout due to clearance and space restrictions. The way i see it, I'm going to have to pound the rear floorboard in to get the room I need. i only have about 2.5 - 3 inches of clearance with just the cutout mounted.

D

 

http://www.quicktimeperformance.com/QTEC/


someone could get a 3" y-pipe, 3" cutout and then 2.5" cat (or straight pipe but cat would be quieter) and catback if they wanted it to the really quiet but still have the 3" performance when you need it.

With a 3" exhaust there may be some torque loss down low supposedly but if you are heavily boosted or turbo period you should probably have it.

 

Check mine out.
It's 2.25 from the cat back. With a high-flo cat on it. Not turbo...yet.

 

thats the same resonator I have. Its like this, piping is 3 inch, how fat is diameter is the resonator on the outside? almost 4 inches, the inner diameter is still 3 inch inside the resonator. Resonators are not going to kill your HP. Thats Bsh!t. My Greddy has two resonators and I dynoed 321HP w/SCer. I highly recommend the resonators on your custom 3 inch exhausts. Keeps the exhaust system a tad bit quiet. What might hurt you a bit is the actual 3 inch cat not the resonator. Resonator is straight thru flow with some cushion on the inner walls to somewhat quiet the noise down.

 

Chunger has a very nice exhaist set up on his SC Max... I think its 3" all the way with two resonators... sounds very deep not loud at all

 

the question was asked before, when do you think it would be a good time to hit the buttom to open the cut out while racing?

 

Best guess? 4000 rpm


Go to a dyno... do 1 dyno with it fully closed and wait for the car to cool down... then do 1 dyno fully open.

Find where the 2 curves meet and that is the spot it should open

 

I have had an electric cutout on my car for quite some time. In the 1/4 mile, I shave about .10 to .15 everytime I open it up. Yes it's loud as crap. But that's why I have it, so I can be quiet on the street and not get any slower on the track. BTW, I have the McCord power plate. Everything is listed in my mods list. There are also pictures on my webpage. But here ya go since I know yall like pictures:

 

[QUOTE=Aaron92SE]I have had an electric cutout on my car for quite some time. In the 1/4 mile, I shave about .10 to .15 everytime I open it up. Yes it's loud as crap. But that's why I have it, so I can be quiet on the street and not get any slower on the track. BTW, I have the McCord power plate. Everything is listed in my mods list. There are also pictures on my webpage. But here ya go since I know yall like pictures:

Thanks, Aaron. How long does it take for it to fully open?

 

I'd say 3 or 4 seconds. I've heard the QTP and Mccord both operate about at the same speed. When you first buy the unit, it should have some red high temp RTV sealant on the edges of the plate where it seals. Well, since day one, it never really sealed 100%. You can barely hear the exhaust escaping. But just yesterday, I removed the power plate cutout and cleaned it and gooped a crap load of red RTV on the places where it seals. It's whisper quiet. And it seals SO easily... 100%!!! In all my research before buying my cutout, all the forums I looked on... they all said that QTP is awesome. And then I read the same reviews on the Mccord power plate. The Mccord is cheapest and I KNOW for certain the customer service is good. I had a few questions when I first got it and they were easy to get a hold of. If you get Mccord, make sure you get a new connector wired in for emission's purposes. I have a connector near the motor, so I can easily disconnect it and remove it from my car. $5 extra.. no big deal. Without that connector, you would have to disconnect it from the switch!!! That would be a HUGE PITA.

*edit* Oh yeah, in my reading, QTP and Mccord both have some SLIGHT sealing issues. Everybody just puts some red RTV sealant on the edges and never have the problem again.

 

I just looked at the McCord website. They sell an LED to indicate the cutout is open. Is that for the hearing impaired?