I'm running the N1 dual exhaust w/ 3.5" tips and they are LOUD, epecially with my ports. Anywho, i really dont care for the noise but my neighbors do. My question is has anyone tried using the "generic" silencers that they sell on ebay?
Do they work?

I had the N1 on my 2nd gen w/ the apexi silencers and they worked good. But if the generic ones work just as good i rather save the $$, b/c the silencers wont be in all the time.


thanks

 

even the real ones dont really work.

 

I have an HKS exhaust, no cat straight pipe off of my ported motor, it was insanely loud, i had the local muffler shop add a generic resonator and the sound was reduced incredibly, hope this helps...

 

you get what you pay for. it's cheaper to do it right the first time with a quality piece. search on resonated mid pipe or borla x1r.

 

You can buy a resonated MP from the RX7 store for about $170. I was amazed at how much quiter my car became comnpared to the straight MP.

 

Yes, I bought the RX7 Store's Magnaflow s.s midpipe. It quieted down my loud-*** GReddy Evo cat-back nicely. It worked for Badass7, too.

 

hmmmmm...all of you guys put another resonator in the MP, im asking about the silencer that go into the end of the tip.

For those running the resonator (borla, rx7 store,magnaflow), did you loose any noticable HP?

 

Use the real silencer made for your Apexi exhaust, the cheaper ones are just that, cheap & dont work for noise, I think they are more for people who need back pressure.

 

the horsepower loss for the resonator MP between the straight mp (shown from SRmotorsports) was between 4-7hp. not much of a difference to me!

 

The silencers you stick in the tip work GREAT. Had one for my '88 turbo back in the day.

You lose a LOT of power with the silencer in there, but it takes pretty much all the bite and drone out of the exhaust. I would pop it in for a long car trip, then remove it at my destination. That way I didn't have to listen to drone the whole time.

It's not a good solution to reduce noise *all* the time - I think someone dynoed a 50hp difference with the silencer in! You basically choke the exhaust down to like 1". But, the car runs and drives fine with it in there. Best use for the silencer is car trips, really.

If you want a variable silencer, Apexi makes the "ECV" in Japan. It's basically a throttle plate for the exhaust - closing and opening it will quiet the exhaust down. They also just came out with the DECS, which electronically controls the ECV. That might be more of what you're thinking - close up the valve when you get to your neighborhood to be quiet when you pull up, but you can open it for full power when you get on the road.

Adding pre-silencers is more of a permanent solution, where it's quieter all the time. Or go with a quieter cat-back, like the RB.

Dale

 

BTW, here's the ECV -

http://www.apexi.co.jp/pro_apexi/exh..._control1.html

And the DECS -

http://www.apexi.co.jp/pro_apexi/electronics/Decv1.html

They have an ECV that's basically a short piece of 80mm pipe (which is what most 3" exhaust systems are - 80mm) so you just cut a section of the pipe out and weld the ECV in.

Dale

 

yes... you do lose a lot of HP..... I know for sure because I had a HKS Carbon Ti and with the silencer the car was noticably slower. hehehe.... but it seemed like it worked.... it did get quiet but not as much as I expected....

 

Silencers are a ****-poor solution to a senseless problem, IMO. With the silencers in, the cat-back will make less power than a stock exhaust.

If your exhaust is too loud, which a dual N1 with midpipe certainly is, then switch to a quieter exhaust. No one has yet to prove that there is any significant horsepower advantage to one of these cannister-style exhausts vs a real muffler like the Racing Beat. The RB is straight-through too, it just uses a real muffler.

Install an RB or similar cat-back and you'll be quieter ALL the time without losing any horsepower. As a side benefit, you'll actually have some hearing left when you hit 40.

 

Yeah just get a new catback and possibly a resonated midpipe if you want it to be even quieter. (it is still going to be really loud, but not as loud as your car now)

 

HAI-TEK7,

I noticed that no one has answered your question thus far. So I thought I would step in and give it a try. I am also running the N1 dual exhaust w/ 3.5" tips, and they are LOUD... I purchased the funnel like silencers that apexi sells and installed them. IMO they do not work as I had anticipated. Take this for what it is worth "after reading this thread I will do the resonated mid pipe to resolve this problem that we both have."

 

yeah, thanks. I decided for the apexi silencers, I had them before on my 2nd gen and they toned them down enough for me.

thanks DBreeze

 

220rwhp with silencer in, 290rwhp with it out

 

DAM!! thats alot!!

but atleast they are removable, so on nice days i can still **** the neighbors off :-)

I just need to tone them down b/c i go to school at 7 am , might give some people heart attacks when starting the beast

 

Any chance you have that in English?

 

They actualy do work pretty good, I use them on my N1 Dual for longer trips and they do a great job...

 

Most of you guys seem to be running "straight through" style systems with no cats. My question is this, will the high flow cat (rxstore) make the Apexi N1 quieter? (I have to use the cat or I’ll surely fail the emissions test).

 

yeah a silencer does work, but it just lightens the sound a little bit so you dont get the real deep sounds when you hit the throttle hard, but as for idling, and normal driving, doesnt really help at all. i had a spoon n1 axle back on my civic and it was so loud even with the silencer on, coudlnt do anything about it
and your talking about DUAL n1s...a

 

Definirwlt any cat will quieten the sound, but I doubt you will be passing emission test with only a hi-flow cat, but than again I don't know how strict the emission tests are in sweeden...

 

The tests are quite strict... But if you dump a little miracle juice into a nearly empty tank (don't know what's it called in US but it’s an ethanol based alcohol...) you will clear the CO levels with ease

 

In the U.S. it's called "Jesus Juice"......