Exhaust looks as good but doesn't sound as good? - Page 2 - Alfa Romeo Forum
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Wizard system only fits as a cat-back, we didn't make interchangeable pieces like Ragazzon or Alfaholics do. We were going to do so but took the decision to straighten the exhaust path and stop it having so many changes of direction in the hope that it would help output. It certainly helps keep costs down.

Our system tunes out the deep/bassy notes which under normal circumstances would resonate into the cabin (boominess) using a Helmholtz resonator. Helmholtz resonators don't actually do a lot to reduce volume though, so overall it leaves a pretty loud exhaust system. Obviously this is what some people want, others less so. We can add a silencer in front of the resonator to reduce volume for people that want it a bit quieter.
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I can confirm with my Wizard TS exhaust that there is no drone at any rpm with a small silencer in the front and wizard catback.
Header---Downpipe---Cat---Small OEM silencer---Wizard Catback. its very bassy at the low revs 1-3k but no drone, then opens up really nicely and screams at the higher revs.

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Ground clearance with the Wizard looked minimal in the vids, but perhaps the car is lowered? I would imagine it might be an issue with speed bumps, but not mentioned, so I guess not.
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wizzard with std downpipes is absolutely fine if the car is not lowered, mine is lowered 20mm and it was fine but i will admit to being careful, there are no issues at all with speed bumps at all ever................... you just learn to park on a curb with just the wheels off the road rather than straddling it 50 50 thats a no no ..................... in short dont worry about it at all
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Quote:
Originally Posted by Pud237 View Post
Wizard system only fits as a cat-back, we didn't make interchangeable pieces like Ragazzon or Alfaholics do. We were going to do so but took the decision to straighten the exhaust path and stop it having so many changes of direction in the hope that it would help output. It certainly helps keep costs down.

Our system tunes out the deep/bassy notes which under normal circumstances would resonate into the cabin (boominess) using a Helmholtz resonator. Helmholtz resonators don't actually do a lot to reduce volume though, so overall it leaves a pretty loud exhaust system. Obviously this is what some people want, others less so. We can add a silencer in front of the resonator to reduce volume for people that want it a bit quieter.
Those resonators must be pretty bespoke.

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Originally Posted by cgc View Post
Those resonators must be pretty bespoke.

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They are but its not rocket science to calculate it, you need to know things like number of cylinders, bore, stroke, rev range, length of primaries, length of secondaries, diameters of exhaust system them you can work out the volumes of chambers necessary to cancel out specific frequencies. There is a bit of trial and error too but you can get it just about right on the first attempt and fine tune from there on.
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Quote:
Originally Posted by bradpit999 View Post
wizzard with std downpipes is absolutely fine if the car is not lowered, mine is lowered 20mm and it was fine but i will admit to being careful, there are no issues at all with speed bumps at all ever................... you just learn to park on a curb with just the wheels off the road rather than straddling it 50 50 thats a no no ..................... in short dont worry about it at all
Is it the lowest part of the car when fitted? If it's no lower than the downpipes or stiffening plates at the front then it should be fine..
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Is it the lowest part of the car when fitted? If it's no lower than the downpipes or stiffening plates at the front then it should be fine..
Do you mean the backbox? I've not heard of anyone having problems with the backbox being lower than the originals. Its right in the middle of the subframe in line with the rear wheels so when going over normal speedbumps the whole car is lifted anyway, but even straddling the middle ones I've not come across any problems. I did about 7,000 miles with the prototype fitted in early 2011 on my GTV V6.
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