Scooby Exhausts

[iamtheexplorer]

Just out of curiosity, does anyone make a dual exhaust system for scoobys?? As they already sound mint with a single system so imagine how thunderous it would sound with a dual!!

[penski]

Edit - curse word day, should know better than to take it out on others. My apologies.

*n

[ToolsnTrack]

Could be the new member was looking for a recommendation from someone, rather than the all-to-common snidely response.

I have no such recommendations, having not yet owned a scoob. I'd say get it custom made though. Usually cheaper and exactly what you want!

[10mpg]

Mine sounded wonderful on a single, i think it's the fact that unequal length headers exit into one tube that give it the offbeat burble, i would imagine duels would make it sound less burbly...

[ToolsnTrack]

If its true duals, you will need 2 turbos.

Whatever you do, it will be exactly the same beat noise unless you change stuff pre turbo.

[Blown_Imp]

You can change the noise of the exhaust by changing the volume and shape of the silencers used in the system.

Large boxes usually remove low frequencies so you end up with a more raspy higher pitched note. They will also help with reducing boom associated with large bore systems.

smaller / fewer boxes will result in a booming note with a very loud low frequency pulse.

J

[iamtheexplorer]

Sorry its a bit dusty!!
I've read that UEL manifolds effect the sound coz its out of phase with the other pistons so if its a dual system have one side even n the other odd lengths so in a way more frequencies are pronounced then put a balance pipe between the system to balance the imbalance if that doesn't contradict it??
Obviously if its a dual system there'll be dual turbos!!

[ToolsnTrack]

The stock manifolds are unequal length. When you swap to equal is does remove the "wubwubwub" charracteristic.

[iamtheexplorer]

Yeah I've noticed with videos on YouTube that UEL and El manifolds sound completely different due to the phasing of the pulses so my theory is that if all the pipes were different lengths to each other, there would be more difference in sound thus increasing the burble if that makes sense??

[docjock]

Full length, headers back, dual system, or just dual exits?

Classic/bugeye/blobeye/hatch?

The Hawkeyes and Hatches have dual exits, some hatches even have twin-tip dual exit (four tips)

[jules1200]

Dec 10, 2014 8:18:52 GMT ToolsnTrack said:

The stock manifolds are unequal length. When you swap to equal is does remove the "wubwubwub" charracteristic.

That's always a bonus then! I know it wouldn't do for us all to be the same, but they must be the worst sounding motor ever, NEVER hear done that doesn't sound pants

[docjock]

I think they sound ok sometimes...

[iamtheexplorer]

Dec 15, 2014 16:46:05 GMT docjock said:

Full length, headers back, dual system, or just dual exits?

Classic/bugeye/blobeye/hatch?

The Hawkeyes and Hatches have dual exits, some hatches even have twin-tip dual exit (four tips)

Basically running it on a dual exhaust system so one for every cylinder block. Its just basically half a V8 thats been squished hence why it sounds good!!
Its in regards to the classic 90's one like when you see one with a big-bore on the back which is alright as opposed to some curse word Corsa 12V thats sounds like gash with no racing heritage.

[iamtheexplorer]

Dec 15, 2014 18:01:24 GMT jules1200 said:

Dec 10, 2014 8:18:52 GMT ToolsnTrack said:

The stock manifolds are unequal length. When you swap to equal is does remove the "wubwubwub" charracteristic.

That's always a bonus then! I know it wouldn't do for us all to be the same, but they must be the worst sounding motor ever, NEVER hear done that doesn't sound pants

Thats fair enough, one man's treasure etc. Wonder if anyones made a UEL for a V4 like an old Capri or Saab??

[docjock]

Dec 16, 2014 14:03:07 GMT iamtheexplorer said:

Dec 15, 2014 16:46:05 GMT docjock said:

Full length, headers back, dual system, or just dual exits?

Classic/bugeye/blobeye/hatch?

The Hawkeyes and Hatches have dual exits, some hatches even have twin-tip dual exit (four tips)

Basically running it on a dual exhaust system so one for every cylinder block. Its just basically half a V8 thats been squished hence why it sounds good!!
Its in regards to the classic 90's one like when you see one with a big-bore on the back which is alright as opposed to some curse word Corsa 12V thats sounds like gash with no racing heritage.

Ah, ok thanks.

As said by overdrive earlier, you would need to add a second turbo as the current headers collect into the single up-pipe.

[zippyobrien]

Dec 16, 2014 14:03:07 GMT iamtheexplorer said:

Dec 15, 2014 16:46:05 GMT docjock said:

Full length, headers back, dual system, or just dual exits?

Classic/bugeye/blobeye/hatch?

The Hawkeyes and Hatches have dual exits, some hatches even have twin-tip dual exit (four tips)

Basically running it on a dual exhaust system so one for every cylinder block. Its just basically half a V8 thats been squished hence why it sounds good!!
Its in regards to the classic 90's one like when you see one with a big-bore on the back which is alright as opposed to some curse word Corsa 12V thats sounds like gash with no racing heritage.

It's got absolutely nothing to do with having a pipe per bank 'like a squished v8'

It's to do with the unequal length of the manifold runners, the firing order and length of the inlet and exhaust ports

Number of cylinders changes the frequency of the sound.

The firing order makes a huge difference ( audi rs4 v8, Ferrari v8 are called 'cross plain cranks '
This is why they sound different to old tank v8 )

[docjock]

This picture shows how unequal the header lengths are before joining at the up-pipe

[DaveEdge]

In my opinion unless you've got a v6/v8 na/tt then I'd always stay with a single exhaust on a straight 4 and 6.

I've got a 6 pot twin turbo that originally had a dual exit and they're not true twin systems, I now run a 3" straight through single exit and prefer the sound and aesthetics tbh.

My GTO was a 3ltr v6 twin turbo and sounded mint with a dual exit though.

Horses for courses, doubt you're going to replicate that rumble from a scoob with it's header design though, has a stock system ever sounded as good on a 4 pot?... Not in my opinion.

[kens]

Dec 17, 2014 0:21:26 GMT DaveEdge said:

Horses for courses, doubt you're going to replicate that rumble from a scoob with it's header design though, has a stock system ever sounded as good on a 4 pot?... Not in my opinion.

Ahem:



produces this:

900 Turbo Burble

[DaveEdge]

Lol, I thought a Saab owner might have countered me with a b202.

For me, the ground vibrations produced by Imprezza's immense bass are unrivalled/

You're right though, 900's do produce a lovely sound mate.