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Exhaust Diameter

180bfj20det

By 180bfj20det,
in Engines & Forced Induction

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180bfj20det Community Regular

180bfj20det

Posted
Posted

I dont want to go to big because I want to keep my car quite. It is a CA18det to run a t28 200sx turbo aiming for 180rwkw to 200rwkw. What power will the following systems flow if they are completely mandrel bent:

(1) 2"

(2) 2.25"

(3) 2.5"

(4) 3"

(5) 4"

Im not every going for more than 320rwhp but I want it QUITE!!!!! I want to go for 2.5". Let me know guys!!

Cheers

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180bfj20det Community Regular

180bfj20det

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Guys I really need help. I want the quitest exhuast system but dont want to kill power too much. Will a 2.5" ex be ok for my CA runing a T28 turbo (amiming for 180rwkW)?

Also if someone does know how much ex sizes do flow, thanks for letting us know.

Cheers

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Jago Mentor

Jago

Posted
Posted (edited)

quiet exhaust + power = no match

get a 3" or 3.5" and stick a resonator in the system

With the CA18, to get best results you need maximum flow.

Get one of those EVC or ECV or what ever they are called from Apex'i if you are worried about noise.

You also can't give flow figures because there are allot of variables involved, the cat converter for one, manifold, etc etc

Edited by Jago
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NickR33 Grand Master

NickR33

Posted
Posted

if you want to keep it quiet, the style of muffler is as important as the overall diameter... I am no expert but I would think you would be better off with a 3" for that much power?

if it helps my car is about 200rwkw and I have a 3.5 inch exhaust... it is very quite as it has a centre muffler and rear muffler... both are traditional style mufflers, not cannons...

can't help with flow rates as I suck at maths

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Cubes Grand Master

Cubes

Posted
Posted (edited)

I would go a 3" with a large straight through intermediate muffler and a large straight through rear muffler.

A good quality muffler will flow extremely well. Its the cheap crap things that have lumps protruding in to the exhaust flow, or like some of the jap mufflers that taper down inside the muffler that cause issues with backpressure.

A decent intermediate muffler also prevents cabin drone. :D

Edited by Cubes
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paulr33 Grand Master

paulr33

Posted
Posted

twin medium ish muffler should flow a good amount with a 3" turbo back system and also shut it up a lot as each muffler isnt very big, i saw a gtr with a twin 3" muffler system that made stacks of power and was pretty quiet, i think it may have been gtreal back in its early days

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180bfj20det Community Regular

180bfj20det

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OK Ill go 3".....

But to kill noise I need to order some mufflers from somewhere....in FRANCE no one stocks anything bigger than 2.5". I want non-cannon style centre muffler and rear mufflers that are nice and quite as mentioned in one of the posts above. Is there an Aussie internet buisiness that can do this? HPinabox only has cannon mufflers, VPW.com.au dont go to 3" and if so its eldebrock.....are these any good...quite frankly id rather have the cannon one from HPinabox cause they look better but cannon = louder right?

Thanks a lot GUYS

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Jago Mentor

Jago

Posted
Posted
OK Ill go 3".....

But to kill noise I need to order some mufflers from somewhere....in FRANCE no one stocks anything bigger than 2.5". I want non-cannon style centre muffler and rear mufflers that are nice and quite as mentioned in one of the posts above. Is there an Aussie internet buisiness that can do this? HPinabox only has cannon mufflers, VPW.com.au dont go to 3" and if so its eldebrock.....are these any good...quite frankly id rather have the cannon one from HPinabox cause they look better but cannon = louder right?

Thanks a lot GUYS

so what's the point of going the 3" if you are just going to be restricting it at the end with a 2.5"?

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180bfj20det Community Regular

180bfj20det

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so what's the point of going the 3" if you are just going to be restricting it at the end with a 2.5"?

Im not going 2.5" anywhere...this is why im asking if anyone knows where I can 3" silencers and mufflers....magnaflow is limited in the EU.

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180bfj20det Community Regular

180bfj20det

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so what's the point of going the 3" if you are just going to be restricting it at the end with a 2.5"?

Im not going 2.5" anywhere...this is why im asking if anyone knows where I can 3" silencers and mufflers....magnaflow is limited in the EU.

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