Hello, so any drone or other unwanted noises since the swap?
how does it sound after a couple thousand kilometers...better or w orse?
did it come with all the needed clamps, hangers,nuts n bolts? Thank u all very much
A.
P.s any videos .... The facebooklink is dead thanks
Mine is a 159 Q4 3.2 JTS and I don't suppose the problems I had with it - exhaust wise, is any different from any of the current iterations from Alfa. The standard exhaust is appalling at sapping power and elevating temperatures. But in replacing mine, principly to get shot of both elevated temperature and curing the drone; circa 2500 rpm, caused lots of issues. Having gone through god knows how many rear box changes; back and forth, Alfa and Ascari, I believe the only real solution is with Supersprint or Ragazzon's.
The Ascari's really did reduce back pressure and the throttle response was noticeably quicker. But they are compound boxes and the free flow character of everything before them created a hell of a racket below 3000 rpm. The Supersprint 100 cpi sports cat, resonator - free centre section, Autodelta headers, combined to create real problems in choosing a suitable MAF. Especially after fitting C.B. cams.
But, the combination of all parts rid the engine of any droning completely. However, the Alfa boxes have to stay for the time being as it was impossible to live with the Ascari's.
But the Alfa's are very, very restrictive. And the Ascaris, above 3000 rpm and more particularly, 4000 and above, were fantastic.
I have spoken with Supersprint about their rear boxes, but they are expensive. The Ragazzons are cheaper and they quote 97dbA as their sound level, which would be ideal.
The problem being, they, like Supersprint and others designed them around the BOGOF 3.2 JTS engine and its valve timing, manifold cats, secondary cats and central resonator. My point being - just how well will they cope with 300 plus bhp without going non - linear, as the Ascaris did?
Volumetrically, they seem a decent size, but beyond that, I really don't know. I am getting to the point where I may be tempted to get rid of the tail boxes altogether, see how that goes, then try some "Cherry - Bombs" in line, just to take the edge off the level.
When I spoke recently to a seriously well qualified engineer, involved in racing circles about the issue, the first thing he picked up on was - "Have you gone for and after market exhaust system"? Clearly, there is still a lot I don't know. But I shall be seeing him again this week: and I shall be "All - Ears".
It is a nightmare to deviate from the manufacturers standard exhaust systems. Which is why I think cat - back systems seem so popular - they change the "Tone of Things", without fundamentally changing the engines operating parameters. Whereas I changed everything and although I am getting there, unless driving in a relatively sedate manner, what previously was a classy cruiser, is now a bit of a hoodlum.