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Location:
Gosford, NSW
Registered:
June 2005
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Exhaust Drone on AE93 SX ... Advice/Comments/Suggestions
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Tue, 28 June 2005 03:47
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Hi,
I have looked though the forums, but cannot find the specific info I needed, so wanted to throw this out there for discussion. Any help is appreciated ...
I have a 1990 Seca SX with no engine mods. Recently got a full exhaust system put on, and since then have basically had it re-made as it was a bit of a bodgy job (piping hitting on engine crossmember, MASSIVE droning, etc). This is how the system stands now:-
Hurricane headers/extractors .. which I would not recommend, mine are within a bee's d!ck of the starter motor, no clearance whatsoever.
2.25" piping, standard press bends.
unknown new cat convertor, hopefully high flow.
2 x 18" 2.25" hotdog style resonators, glasspack
14" long, 2.25" Redback baffled rear muffler
straight 2.25" piping at exit, no "milo tin" tip or anything
The car performace has definite improvements in mid range pull and top end is less "strangled" now ... BUT ... the resonant droning inside the car at around 3500-4500 rpm is still pretty bad. Unfortunately, as you would know due to the gearing on these cars, that means between 105-125Km/h on the freeway. I realise everyone's interpretation of this is different, as per my lengthy arguements with the muffler shop, but is there a different type of rear muffler that I could look at. Their advice is cr@p and they can't even keep to the same story as to size Vs noise and baffled vs straight through.
Would a decent straight through cannon style muffler at the rear be quieter inside the car than a baffled muffler ?
I have got them to do a more restrictive 2" dia 16" long muffler for the rear and that does quieten it but looses performance. Obviously it is all down to muffler design as to how quiet it would be, and there is a trade off from power to noise... but just wondering if there is a better way.
Thanks,
Stu
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