vs exhaust system question, making it myself. (not the cat)
Hi, have a question. This might have already been posted but had a quick look n haven't found what I was looking for, or I have missed it.
My vs Calais atm has stock exhaust. I want to make it louder and had a thought.
the exhaust has a rear muffler, muffler in the middle of the car, then the cat, then the extractors.
if I take out the middle muffler and put a str8 pipe in between, this would change the sound,
is this the same as a exhaust system you'll buy? like premade blot on ones?
(also I know for a better sound change the cat).
but changing the middle muffler to a str8 pipe I was told car will go faster n have a better sound, is this correct?, and I was also told if u leave the middle muffler and take out the rear one and put str8 pipe, you'll change the sound also but have no back pressure so you'll lose power.
Almost not here!
Remove the rear muffler will make it drone - badly. We all did this about 15 years ago when the first lot of rear mufflers burnt out. This was great for about 500kms of open road travel - but the wife and I got real tired of it in no time. (I now run rear mufflers on both my V6 VN's).
On the V8 VN I run a redback exhaust (off Ebay 3 years ago) with no rear muffler - just the centre unit and 2 1/2 pipe. Sounds nice and makes a reasonable note for cheap.
White 05 V6 VZ Executive - Thrashed Ex Telstra car
and 3 Dangerous non ABS VN's
Modifying the stock exhaust system wont do much for performance in your case, unless you're bolting in a rear mount turbo.Originally Posted by mitchy_vn
Most of the systems you buy now days are mandrel bent, versus press or draw through bending like the factory supplies.
This means better flowing bends, so putting a piece of tube in place of a muffler doesnt automatically make it 'just like the aftermarket ones'
The common one seems to be to put a hotdog in place of the rear muffler.
But they're only $60, why not experiment and put one in the middle instead?
Let us know how you go
Holden4eva!
I used to have the Cat, Hotdog and then rear muffler on a lukey exhaust system (Manual) and it gave a real throaty sound with only a small amount of drone when using 2nd to pull to a stop.
How do the V6 VN's sound with the rear resi on? I've got a VR (very similar engine to the VN) with no rear resi, sounds great at idle and when cruising along at say 40 - 70kmh, but i get drone from around 2000-3000 rpm. May chuck on a rear resi in future.
As for your question mitchy, maybe make yourself a 2.5" pipe from the cat back. Seeing as you're making it yourself, you could try it with no rear resi at first, if you're finding there's too much drone for your liking, throw on a rear resi again.
hrmm il try sooon taking out middel muffler, see how it sounds, maby add a cat in, stil sounds shit,, then il hav to buy exhaust or get myself some 2.5" pipe like Bizmark said n see if i can make it lol once i get the middle muffler out first il youtube and shows yous all how it sounds !!
Add a cat in? Huh?hrmm il try sooon taking out middel muffler, see how it sounds, maby add a cat in, stil sounds shit,, then il hav to buy exhaust or get myself some 2.5" pipe like Bizmark said n see if i can make it lol once i get the middle muffler out first il youtube and shows yous all how it sounds !!
at a cat in ,, i mean lik replace the stock one with a aftermarket one lol
Go get some mild steel steam pipe and some bends and mufflers and start tacking the stuff together. Its great fun.
Because of the firing order of the cylinders, you can NEVER get a decent exhaust sound from a GMH V6. You can try, waste money and time but will always have something that just drones and is annoying to both passenger and general public. Grow up - you'll get over it then.
WTF whos arse did you pull that out of?
153624 is a pretty generic firing order....
The firing order for a V6 is 1,6,5,4,3,2.Not 1,5,3,6,2,4, like a straight 6.,And it has everthing to do with how the exhaust note sounds.Ive heard/read heaps of race car engine builders and race bike engine builders talk about how the different bike or car engines sound because of their firing order .Also the gregorys workshop manual says the following about the V6 engine-
Each coil directly fires two spark plugs simultaneously eliminating the need for a distributor.The firing sequence ensures that one spark plug fires on the compression stroke,and the other on the exhaust stroke.
http://www.youtube.com/watch?v=PzSULUg4LaM For The Win
Last edited by Andrew426; 28-09-2010 at 04:31 PM.
I dont think its a waste of time fitting better exhaust systems to get a better sound or whatever.I have pacemakers and an aftermarket system myself and it sounds pretty good for a V6..And no where have I mentioned that the firing order is the ONLY thing that effects the exhaust sound..so Im not ignoring anything.I just posted that Ive heard and read how the firing order effects the sound of an engines exhaust, because you said to the other guy who first mentioned the firing order "whose ass did you pull that from" I thought, Ive heard about it ,so I decided to post what Ive heard and read about it.No one mentioned anything about how all the other stuff like how the cam profile and timing or whatever can effect the exhaust sound,so I didnt bother mentioning them.Theres a lot of things that can effect the sound of an engine,the firing order is one of them.
Uh I edited my post about 10 minutes before you made yours. Sorry dude.
The point I think I was trying to get at, is that benboy is making a broard and sweeping statement, saying that people like you and I (I have extractors, no cat, 3" and a flowmaster muffler) are apparently driving around in cars that sound shit - but we are too stupid to realize. While he provides no evidence at all for his statement other than saying that the firing order makes it impossible - which is a baseless and ill-informed statement to make.
agreed,a lot of people talk about the drone of the V6 when the standard exhaust is modified/changed.I found the drone pretty much went away altogether once I fitted pacemakers.The standard manifolds seem to make the drone sound worse.The system I bought is 2 1/4 inch system from the catalytic converter back (catback),with the catalytic converter still fitted,and a single large sports type muffler in the middle,and no rear muffler.It sounds good,quiet at light throttle with a bit of a rumble,but when the throttle is opened up,its LOUD-But a "good" loud .Just how I like it.
Last edited by Brett_jjj; 28-09-2010 at 08:43 PM.
i work in an exhaust shop.The most common upgrade is a 2 1/2 pipe with straight through\ centre muffler and then the option for noise comes at the rear where u have the choice of either a tail pipe of rear muffler pipe. there is never an option in getting the centre pipe as pipe only. we deal with red back mainly, cheap option, personally i prefer the sound of the lukey mufflers but that option is dear. lukey also do a replacement centre muffler style (straight through sports) that is the same size as the factory ones.
iam building a system for my statey now. pacemakers for the performance and note change. then aftermarket cats running a twin 2 1/2 pipe work into twin straight through lukey mufflers and tail pipes out the rear. motor is a suercharged 6
Leave lazy 11's everywhere you go!!!
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