3" exhaust sounds

[Dc5Mike]

just had mine fitted yesterday with 2 silencers and i can say sitting at 60 -70 -80 mph there is a tiny bit more drone then my 2.5" 2 silencer system with a smaller exit then standard and that barely droned.

I'm well pleased with it, quiet while cruising but as soon as you give it some damn it sounds mean :xvtec: :twisted:

 

[C2AXG]

Mike that sounds perfect now please get some videos up! Who made it for you?

 

[James-T]

My old EP3 had a 3" system on it... Wasn't too bad for droning.

https://www.youtube.com/watch?v=kX3w_iXipxI&list=UUmoMwrv812Cr01WwOs7Zjbg

 

[tombakers]

Mine is droany, am going to make a few changes, hopefully will help.

Work of art though, mandrel bends and tig welded

Sounds lovely on tec.

 

[Wingnuttzz]

Mine is droany, am going to make a few changes, hopefully will help.

Work of art though, mandrel bends and tig welded

Sounds lovely on tec.

*snip*

Looks a nice system, am I right in saying you have 2 tiny silences in the b-pipe there?

You should be able to fit a bigger one where the OEM b-pipe silence fits, should help with the *boom* a bit.

 

[satinep3]

Rob what induction kit you running or you got body's ?

 

[TyperItr]

Here is what my mid silencer is like

This is the tail pipe silencer

I also have the spoon 4:" with the small resonator in it.

I think a what some people call a drone others may not. And what some think is loud others think its too quiet. They are quite big silencers and when travelling along a motorway its droney, but when Idling its not much louder than my toda.

 

[tombakers]

Looks a nice system, am I right in saying you have 2 tiny silences in the b-pipe there?

You should be able to fit a bigger one where the OEM b-pipe silence fits, should help with the *boom* a bit.

Yeah I did wonder about the size of the silencers, bit on the small side.

Was also considering a helmholtz resonator, they come standard on a s2000 and basically target a certain frequency of sound (the drone) and cancel it out by using the correct length pipe. It's a bit like blowing over a bottle afaik

See this link

http://www.s2ki.com/s2000/topic/510969-amuse-helmholtz-resonator-dimensions/page__st__25

There is an equation for working out the correct length pipe but first you need to know the frequency of the sound you are trying to cancel out. I have just ordered a db tester that has a frequency testing function also.

I had the car noise tested at the track the other day and it read 104db and there limit is 101.

Need to try and know 5-10db off that and some 3.5-4.5k drone. Decel is horrendous in this range.

 

[Matt-r8]

...

 

[Lewis.]

Not a DC5 but a k20 all the same.

Heres my old kswap ek running a k tuned mani and a 3" Solid fabrications system with a toda tip. Was taking it easy as the car wasnt mapped at this point...

http://www.youtube.com/watch?v=FCXTaWEkl3U

 

[estilo92]

Sorry bringing up old thread.

I am new here. I have eg with k20a type R DC5 engine.

I have 2.5 in. I was wondering if upgrading to 3 in will add up some more HP.

I don't mind with the loud sound as long as it will add up some more HP.

 

[53 Teegwa]

Yes in short

Few people have done the upgrade and dyno checks to confirm hopefully they'll be along to chip in.

For me I went from the buddy club pro spec to a custom 3" and never looked back no figures to confirm before and after but drive definitely felt better (across the whole range)


Gordon

 

[leejw87]

http://youtu.be/81fL60kTODQ

3" with one silencer

 

[estilo92]

wow amazing.... thanks for posting the YouTube link....

 

[integraleo]

From a 2.38" system to a 3" system with proper mapping you will gain between 9-14hp depending on quality of both systems. Over and above a 2.5" system you're looking at 6-10hp increase. These are of course estimates based on my own experience with doing the same but it gives you a rough idea what to expect

 

[estilo92]

@integraleo : thanks for the info 👍

 

[integraleo]

You're welcome

 

[2ndy]

What sort of money are people paying for 3 inch exhausts? I currently have a HKS Hi power and tegiwa exhast manifold. Would like to keep these two, would i see the gains just replacing the centre section with a 3 inch?

 

[integraleo]

What sort of money are people paying for 3 inch exhausts? I currently have a HKS Hi power and tegiwa exhast manifold. Would like to keep these two, would i see the gains just replacing the centre section with a 3 inch?

You probably would yes,the solid fabrication 3" exhaust system cost me £550 and using dc sports manifold which is 2.38-2.5" (can't remember) still gained me 10 hp when it replaced my trust exhaust system. On swapping out the 3" for a kakimoto regu06r I lost 12.5 hp. Main difference between the trust and kakimoto can be seen by looking up the tail pipe where the kakimoto is very restrictive and narrow loosing a couple more hp than the trust. You won't have a problem with the manifold not being 3". Personally what I would do is get solid fab to make the system with a connection at same point as your back box with a reducer pipe allowing you to choose and swap rear boxes to see which you prefer.
One thing I will say even when talking 10 hp differences I can honestly say performance gains are not really noticeable on the road. After fitting the kakimoto I reeeeaaallllyyyy couldn't tell any difference in performance

 

[53 Teegwa]

For me I had a local place do mines (search Evil exhausts on FB).

He's a good mate of mine and for the system you'd be looking at around £500 for it. He stopped doing them for a bit but could always check if anyone around the area was interested.

Mine is mated to a six sigma racing manifold and the decat pipe (3") has the required step down for this.

Reason I don't have before and after is well the car changed with more than the exhaust from first dyno so not a fair comparison lol.

Still need to get rolling vids of mine but spending more time getting myself healed than driving it which is a shame.


Gordon