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I supported Toymods
Toymods Club Secretary
Location:
Sydney
Registered:
May 2002
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Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 01:46
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Hey guys,
Just wondering if there's anyone here with views or opinions on the best muffler design for getting a free-flowing exhaust with minimum noise.
I've decided to bite the bullet after 4 years and want to get the exhaust gases moving a bit better, however want to try and keep the decibels down as much as possible.
Most FWD 4AGE Corollas that I see with sports exhausts tend to piss me off a bit, and I'll be really annoyed if I end up with a system that:
a) Is too loud
b) Drones
c) Sounds like a giant fart has been stuck up the car's arse!
I'm not really interested in big shiney fuck-off mufflers or specific brand names, I just want something that works.
My current plans are to keep the factory headers in place at the moment, and go for a pipe diameter of around 2 inches (with mandrel bends).
Ideally I'll be able to unbolt the rear pipe (muffler) and bolt the standard one back on if I ever have to make a long trip and don't want the noise, but I'd prefer for it to not be so noisy that this is always necessary.
Are there any thoughts/opinions/experience on what works well for the 4AGE in terms of muffling?
And has anyone had the same aim as me in the past and been successful/unsuccessful in ever making it happen?
Anyone?
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Location:
South Australia
Registered:
July 2002
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 01:50
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I've often thought about this myself, and I decided I'll just get a professional guy to make the system up and just tell him what pipe diameters I want and that if he makes it too loud I'll jam the whole system up his arse (or just get a resonator put in, whichever he is more comfortable doing).
Generally speaking - 2 inch pipe with mandrel bends won't be too farty on a 4A-GE, although the factory headers may not help too much with fartiness.
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Location:
Epping, Sydney
Registered:
April 2003
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 01:54
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I know that 4ages exp in rollas are veyr hard to keep quiet with a zorst in 
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I supported Toymods
Toymods Club Secretary
Location:
Sydney
Registered:
May 2002
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 03:05
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| RobST162 wrote on Fri, 05 March 2004 12:54 |
I know that 4ages exp in rollas are veyr hard to keep quiet with a zorst in
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I know - There's got to be some sort of trade off in terms of noise for flow, which i'm prepared to accept.
I just want to see if I'm going to be able to minimise it as much as possible, and still make some worthwhile gains in terms of performance.
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I supported Toymods
Toymods Club Secretary
Location:
Sydney
Registered:
May 2002
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 03:07
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| FWDboy wrote on Fri, 05 March 2004 12:50 |
although the factory headers may not help too much with fartiness.
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Why exactly would that be 
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Location:
NSW.south coast.Drifting
Registered:
February 2004
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 03:14
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once you have worked out how to get rid of back pressure noise, put in one of those exhaust open/close solinoid valves, so on long trips/cops you just flick the switch and it shuts your car up be limiting the gas flow (kinda like a on/off muffler)
you can get them at muffler men for about 500 i think. expensive, but they to the job.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 03:22
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start your exhaust big, and get smaller
the biggest gains are made closes to the engine, where the gasses are still hot
so you want a good set of extractors (4-2-1, or 4-1, depending on what you want), 2" or 2.25" pipe to a high flow cat, then into a 2" pipe, back to a fairly standard muffler on the back (a giant rice can at the end will make very little difference over a reasonably flowing oval muffler)
If you're like me, you want something dead quiet at idle, and once you start screaming up the rev range you dont mind the noise.
interestingly, despite the fact I have a 3" system on my car with no cat, at idle you can barely hear it.
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Location:
Melbourne
Registered:
January 2003
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 04:00
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I had this idea in my head for a while. Might not get maximum hp but will have a nice note and hp plus retains a fair bit of torque.
4/2/1 extractors
2 1/4 all the way.
Standard cat. (I think)
a welded 2.5 exhaust.
(standard cat with a chopped tip. Buy a tip from autobarn according to torque/noise requirements.)
This should work good. I'm running something similar atm. Quiet. But at high rpm great note and sound. Very inconspicious exhaust. Good performance. Relatively cheap.
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 05:05
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i would personally recommend a Lukey Super Turbo muffler - triple pass ducted design... very high flow, and dead quiet.
PS: Lukey super turbos are just re-branded Magnaflow mufflers, so check out their site if you want the details (catalogue is the same)
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Location:
Melbourne
Registered:
May 2002
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 05:34
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i thought lukeys were walker
mangaflow is american, very nice stainless stuff
any way, on my car 4age i've got
4-2-1 extractors via IDB, via stewart wilkins racing, via liverpool exhausts.
then into a generic straight through centre inlet offset outlet, proper straight through.
then into a shiney fuck off 3A racing cannon, it's my car 
all 2.25 piping, no bad bends as it's under axle, it's easier for exhaust moron to bend, they are lazy and i'm cheap, works good
originally it had a resonator where the staight through was, too damn loud, i'd recommend two straight through mufflers at a minimum on any 4ag powered car. Induction noise will be loud if you have a pod, and you can regulate that with your foot. I can't stand drone. Save your ears people.
dodgydan
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Location:
Compton.Sydney
Registered:
January 2004
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 08:00
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I got a Exhaust system on my SX rolla. Goes like this:
- Cat Back (normal sad cat)
- Two inch pipping all the way(no hot dog)
- Then a Muffler with a 3 inch i think.. Dump tip
and its pritty loud doesnt fart alot tho only at higher revs in low gears. Want to make the car less noisy.. would a standard muffler help in some noise reduction? but keeping the two inch pipping?
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 08:10
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| c2888 wrote on Fri, 05 March 2004 16:34 |
i thought lukeys were walker
mangaflow is american,
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yep, lukey is walker, and walker is prctically magnaflow
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 11:52
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 the Walker/Lukey book we have at work has some nice tips on exhaust accoustics. i decided to go with the stainless straight through glass pack muffler they make. being on a turbo it's not too loud anyways. the glass pack resonators they do put inline would quieten a system down a fair bit if it where too loud. i have even seen glass pack exhaust tips on the net.
this is my current set-up
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Location:
Menai area of Sydney
Registered:
June 2003
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Fri, 05 March 2004 12:45
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Has anybody tried making a twin exhaust from the cat back. All the tuning benefits other than dumping the exhaust gas should be had by the design of the exhaust in front of the cat. So running a dual exhaust or a pipe down each side of the rear of the car should halve the volume of exhaust gas in each pipe and so enable the use of smaller mufflers to get greater silencing effect. Plus an exhaust tip on each side of the rear would look pretty schmick methinks. 
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I supported Toymods
Toymods Club Secretary
Location:
Sydney
Registered:
May 2002
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Tue, 09 March 2004 01:36
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Thanks for the advice above guys - Some of it has been very helpful.
Ed - Thanks for the tip on Lukey. I didn't know much about them however saw on the weekend that my mate's rally car uses a Lukey muffler and that's quiet enough for my liking.
Also found an interesting muffler review/comparo on Autospeed in case anyone's interested.
http://www.autospeed.com/cms/article.html?&A=0 383&P=6
Draven:
| Quote: |
the biggest gains are made closes to the engine, where the gasses are still hot
so you want a good set of extractors (4-2-1, or 4-1, depending on what you want), 2" or 2.25" pipe to a high flow cat, then into a 2" pipe, back to a fairly standard muffler on the back
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Would adding another free-flowing muffler at the middle of the car cause too much restriction do you think, or would it quieten things down nicely while still allowing better than standard flow?
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If you're like me, you want something dead quiet at idle, and once you start screaming up the rev range you dont mind the noise.
interestingly, despite the fact I have a 3" system on my car with no cat, at idle you can barely hear it.
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Yeah - But I've got a 4A, not a 1J! 
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Location:
sydney
Registered:
June 2004
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Tue, 22 June 2004 08:55
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i think ull find this link intresting....theres 3 pages to go to on the bottom which give u flow tests in cfm and noise in db of various mufflers
check it out!
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Location:
sydney
Registered:
June 2004
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Re: Best Muffler Construction? (or "How to make a 4AGE quiet?")
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Tue, 22 June 2004 09:01
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also has muffler sound recorded toO (mp3)!
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Location:
Adelaide
Registered:
April 2003
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