I have a 3.9l RV8 and it has twin 4-1 stainless manifold running into 5 inch silencers on each side. When I specced the exhaust I just said make me
something that will sound cool, look cool and pass the IVA. It did everything I wanted including whispering it's way through the iva at 91db.
Now it's just to quiet. I have been reading online about cherry bombs and glasspack exhausts but I am unsure how these are constructed and if
they differ from what I have. I am loathed to drill out the rivets on my exhausts and see if it's got some sort of packing. I look down the
exhaust and I can only see a perforated tube.
I just want a slightly louder, more angry ripsnorty exhaust note but I am unsure what to do. I don't have room for any H or cross over pipes so
I am limited to mufflers. Any thoughts?
I miss my Monaro, it's all about the V8 burble.
I would check the exhaust packing, I'm sure you can find a better replacement.
I have exactly the the opposite problem! 4:1 exhausts 5" straight through with expansion chambrs and had to fit additional tailpipe restrictor to
get through iva. Same engine bored and stroked to 5l with different heads.
Count your blessings!
When driving it does not sound loud but the meter tells a different story.
Cheers!
So if tailpipe restrictors tend to quieten.........
Would a mega tailpipe increase volume....... possibly.
Hmmm, I've been trying to decide on what silencers to use for my build (4.0 Rover V8) for a while.
What length silencers are you guys using?
I want something that'll pass IVA, and not get me black flagged at track days.
Just drive it hard! The packing will over time wear out. Simples.
In my younger days we use to always stick a bit of petrol down new back box and light it to burn the wadding out! On and after market exhaust to get
the noise level up! Worked a treat.they always get louder over time.i can nkt reccomed this method though as its silly and not safe
This is what my car uses; it has to be small as it is underslung. It does get a bit tiresome after a while.
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quote:
Originally posted by scudderfish
This is what my car uses; it has to be small as it is underslung. It does get a bit tiresome after a while.
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I'd agree with the witchcraft business!
On our type of cans, you just don't get the burble and it is actually quite quiet when poottling around.
when going for it, mine has been described like two Harley's blatting down the road.. and it is pretty damn loud.
mine might be 4" not sure, and a bit longer.
https://goo.gl/photos/MQ7RgWq8KXwifLhN6
[Edited on 20/5/16 by Chris_Xtreme]
quote:
Originally posted by Chris_Xtreme
I'd agree with the witchcraft business!
On our type of cans, you just don't get the burble and it is actually quite quiet when poottling around.
when going for it, mine has been described like two Harley's blatting down the road.. and it is pretty damn loud.
mine might be 4" not sure, and a bit longer.
https://goo.gl/photos/MQ7RgWq8KXwifLhN6
ah, a lot of the noise in the vids was the intake, unfortunately once my air filter and the bonnet is on, a lot of that is lost.
you have a soundtrack of how yours sounds now?
oh and I have never taken them off, so don't know how full or empty they are of wadding. from how it popped and banged when on the carbs, I would
images some of the wadding has been lost, but probably not that much. on my previous xtreme where I thought there would be none left, it was still
completely packed, after flames coming out of the exhaust loads - not just overrun when when going down the A roads! - before I got it fixed, but it
was like that for a good few thousand miles.
[Edited on 20/5/16 by Chris_Xtreme]