172 ph1 GDI / YOZ / KTEC stealth exhaust

[Grumly2000]

Hi mates,
I've had a Orbisoud stealth exhaust it was catastrophic. :dead:The exhaust was in 60mm diameter with 2 box. I've had resonance between 3k and 4k RPM.
My seat was vibrated, and all the car was a geant resonator:quiet:

Well I know that F4R produce much vibration in this frequencies but it's my daily car.

Now I want to buy another stealth exhaust.
I know you have in England a lot of manufacturers. So I've read a lot of topics here.

But I need your advice, because my car isn't totally stock. I have a CAI K&N Typhoon. I think that it's may be important.

Actualy my car is a 172 ph1 with OEM cat and K&N CAI Typhoon. Used every days.
I don't care about miror polishing.
I love severe(?) sound, in high frequencies, I hate loud "GroupN" sound.

Where should I spend my money :evil:
Yozz 'quiet' or GDI or Ktec Mk2 ?
Thank's for your tips

 

[Dash]

H&S or Prospeed. Have it just how you want it.

 

[Laura]

hes clearly not UK based tho,

personally i would say the GDI one, it souns awesome,
the yoz one drops to a bore of 1.75" in the back box which is thinner and more restrictive than a standard system

 

[Grumly2000]

GDI seems to be loud in bass frequencies, isn't it?

Well 1.75" is very restrictive. Clio Cup used a 2" backbox output. Thank's for this important information!

 

[Fletcher]

I'd go for either a yozzasport, or ktec stealth

 

[Laura]

GDI seems to be loud in bass frequencies, isn't it?

Well 1.75" is very restrictive. Clio Cup used a 2" backbox output. Thank's for this important information!

i had a gdi one on my ph1 it replaced a k-tec one.

the k-tec was raspy and annoying

the gdi was throaty in a good way, maybe a little boomy at motorway speeds but it depends what your after.

 

[Fred@BTM]

hes clearly not UK based tho,

personally i would say the GDI one, it souns awesome,
the yoz one drops to a bore of 1.75" in the back box which is thinner and more restrictive than a standard system

more restrictive than a standard system? you a flow expert now?

 

[DrR]

worded like a scam lol


i'd get the yozzasport.

 

[Laura]

hes clearly not UK based tho,

personally i would say the GDI one, it souns awesome,
the yoz one drops to a bore of 1.75" in the back box which is thinner and more restrictive than a standard system

more restrictive than a standard system? you a flow expert now?

no thats what andrew said to me, i have the email at work of you want proof lmfao

plus it hardly takes a mastermind to work out anything with a thinner bore than standard is going to be more restrictive,
im meerly offering my advice, i dont have anything to gain, plus GDI dont have any atm anyway so he cant reall have one of them,

i looked at all of them a few months back and decided to stick with standard

 

[ForceIndia]

Not as simple as bigger bore=better. Don't remember exact details, but too big a bore can bugger the flow, something to do with the gases coming out in pulses. Someone clever like Fred/Yozza can prob explain.

 

[TheJesus]

mine's a true 2.5" all the way through, was only 2" before and the differencce was obvious. too big will obviously bugger up the back pressure, but 2.5" made a big difference when I had the ITB's on, cant tell standard, as I dont have anything to compare it with

 

[fil_b]

been looking on you tube for vids

the ktec stealth is more common

 

[Floodie]

3" ftw

 

[matt_182]

i was thinking of 3" exhaust on my 182 but seems pointless when the manifold is all 2.5" would f**k the flow up if it went 3"

 

[fil_b]

sure i red 2.5 was recommended for the sports

 

[Grumly2000]

Laura Laura you had got Ktec MK1 or MK2 before your GDI ?

I think too 2.5" is perfect for a F4R 170-200bhp, because on a SR20DET Nissan 3" is perfect but....with 250-300bhp

 

[Laura]

i had a ktec one on my ph1 172 and replaced it with a gdi one

 

[ditz]

you cant just say a bigger bore is better on a turbo car yeah but on an n/a there are a load of calculations need doing that works out optimum bore plus it depends where you want power you may even find a 2inch pipe would give loads of torque where as 3 inch will add to power
wont claim to understand it fully but you see my point

 

[theduck]

really we should be telling this guy how to fix the problem with the orbisound rather than the normal lovers and haters 'you should buy this becuase I did'

 

[TheJesus]

really we should be telling this guy how to fix the problem with the orbisound rather than the normal lovers and haters 'you should buy this becuase I did'

he's not asking that though is he? Look at the thread title genius

 

[theduck]

No he asked for which exhaust to buy, but it is generally accepted the Orbisound is the best, also none of the exhausts being mentioned as alternatives are going to sound how he wants them to, and the day someone gets impartial advice about tuning products/companies on here i'll eat a hair omlette.

So telling him how to fix the problem with the Orbisound sounds like the best option, does it not?

 

[Laura]

ive never heard much on orbisound tbh , so i certainly wouldnt class them as the best

 

[theduck]

Do you read this forum with your eyes shut?

 

[Laura]

quite the oposite

 

[Fred@BTM]

haha, orbisoud (NOT orbiSOUND) are one of the best exhaust manufactures on the planet!

 

[wide]

sounds like you should try taking it to a different garage & see if its been fitted correctly m8!

 

[Grumly2000]

haha, orbisoud (NOT orbiSOUND) are one of the best exhaust manufactures on the planet!

Yes may be....
I thought it too...before!
Well I heard Orbisoud on Clio RS 2004 (with twin gaz output). It sounds lovely, best I ever heard on Clio !!!

But on mine, It's sucks
The Orbisoud exhaust was on 60mm with no diameter restriction on output.
It seem's that air flow is different on 172 mk1 than 182 mk2!

So telling him how to fix the problem with the Orbisound sounds like the best option, does it not?

The problem seems to be that Orbisoud have no time to help me. They refund me. So now I want to spent my 350£ into another manufacturer :quiet:

Basicaly I'd prefer to stay with Orbisoud but they don't consider me as a customer must be.

 

[Ali]

haha, orbisoud (NOT orbiSOUND) are one of the best exhaust manufactures on the planet!

Defo! On the vee it's over 3k i think!

 

[cupholder]

Hi mates,
I've had a Orbisoud stealth exhaust it was catastrophic. :dead:The exhaust was in 60mm diameter with 2 box. I've had resonance between 3k and 4k RPM.
My seat was vibrated, and all the car was a geant resonator:quiet:

Well I know that F4R produce much vibration in this frequencies but it's my daily car.

Now I want to buy another stealth exhaust.
I know you have in England a lot of manufacturers. So I've read a lot of topics here.

But I need your advice, because my car isn't totally stock. I have a CAI K&N Typhoon. I think that it's may be important.

Actualy my car is a 172 ph1 with OEM cat and K&N CAI Typhoon. Used every days.
I don't care about miror polishing.
I love severe(?) sound, in high frequencies, I hate loud "GroupN" sound.

Where should I spend my money :evil:
Yozz 'quiet' or GDI or Ktec Mk2 ?
Thank's for your tips

hi m8 your best bet would be to go to an independent exhaust specialist and have it checked over for fitment and if all is ok have another silencer included in the orbisound to make it less loud, that way you will spend less money and still have the supposedly best exhaust on the market for clios

 

[ben_p]

hes clearly not UK based tho,

personally i would say the GDI one, it souns awesome,
the yoz one drops to a bore of 1.75" in the back box which is thinner and more restrictive than a standard system

really? god you took the words of my mouth. p.s i hear that supersprint are looking for a flow tester.. may be worth a punt?

 

[mattjk]

So... after reading all that, everyone on agreement that 2.5 inch bore is about the best for a stock/mildly tuned engine?

 

[Fred@BTM]

^yep, but it'll be loud

 

[TheJesus]

No he asked for which exhaust to buy, but it is generally accepted the Orbisound is the best, also none of the exhausts being mentioned as alternatives are going to sound how he wants them to, and the day someone gets impartial advice about tuning products/companies on here i'll eat a hair omlette.

So telling him how to fix the problem with the Orbisound sounds like the best option, does it not?

No it doesn't tbh, a 2" system is going to be s**te regardless, I've had one that followed the original exhaust path and it was utter garbage.

Now I want to buy another stealth exhaust

 

[mini-valver]

Yozza made the stealth to be quiet, on an F4R that means you wont gain any power but it's an amazing system in terms of quality and design. The K-tec is generally regarded as good now the silencer issues have been sorted. I have'nt heard anyoone with a GDI stealth so could't comment. Neither can Laura as she had a 3" backbox NOT a stealth.

It depends what you want from the exhaust. Gains, noise, looks???

 

[TheJesus]

Laura's 2.25" to 3" backbox is about as loud as my 2.5" to 3.5" system, so will probably be similar as they only make true 2.25" and 2.5" bore zorsts.

Like you say, depends what you want from it, performace, looks, noise or just a system that wont rust and fall to bits around the time the warrenty runs out... nice one Renault, do you even have a quality control dept?

 

[Peter.K]

Renault do have quality control, they control the quality so as to make sure things fail three years after purchase.

 

[Grumly2000]

What I want is:
1. Music not noise, but a lovely songs like a 6L BMW
2. performance if it's possible but at least as Renault OEM!

look=don't care :quiet:=> stealth

So what would be the best?

For TheJesus, of course we have a dept. quality control dept...and many more. On the main R&D site we are about 10,000 p. All the major dept are here.

 

[mini-valver]

I'd go K-tec then as it's proven. The Yozza, although the quality is amazing, I've never heard it and they got zero gains IIRC.

 

[Deep Dish]

K-tec sounds crap going from the vids iv heard. Raspy yukkk

Not sure what its like in real life but the vids have put me off big time


GDi one seems the best all rounder but for some reason not that many folk seem to have one.
Why is that?? :S

On paper they look the best all rounder, deep sound not raspy, decent quality?, decent price, power gain, not silly loud

 

[Fred@BTM]

the yozza stealth is designed to be a replacement to the OE system, but higher quality, its not designed to create maximum output, people wanted a completly quiet stealth, so we (when i was there) did that

but its still a 2.5inch system, just with a heavily silenced back box

yozza also do a stealth that is designed for maximum output, i have it on mine, sounds brilliant, but if you're even slightly, remotely even 0,000001% gay, then you won't like the noise!