You bought well and have clearly made a serious amount of “post purchase investment”. I remember your car and like it now even more! Giallo is so rare.
I just realized I had posted this a few weeks ago on Instagram but not here. Video starts with remote valves open and then you can hear it when Roberto hits the button to close them. Allegedly picking up tomorrow (25 weeks was yesterday). https://youtube.com/shorts/ugztArz86cY?feature=share
Got 135171 back this morning with an H pipe (not Fabio's) and Supersprint over axle pipe. Great sound and no resonance. Straight pipes and headers seem to lead to resonance just about every time, even with mufflers designed to work with straight pipes.
That’s great news Taz, Thank you! Notice any difference with those Supersprints out back of the H-pipes? Bill FL
Bill- Not yet since I just got her back today and only drove her around the block. I would imagine the hp lost to the H pipe is about the same as the hp gained by the uncrimped, over the axle pipes. More when I drive her more. She definitely is quieter/smoother at idle and driving with the valves closed, which is good. The straight pipes are great for power, not so much for low to medium rev exhaust music with the 6-1 headers.
I would try Supersprint’s open x-pipe. My car is straight through catless with OEM 575 mufflers and it is silent at cruise and no resonances at any rpm, both with valves always open or closed. My wife and I have cruised ~20 hours in the past month and she loves how quiet it is on the highway, including higher rpms. The sound was also very good with the OEM 550 x-pipe center muffler and Tubi competition rear mufflers as well as no rear mufflers, but it had much less low-midband power, and there was cabin resonance in the midband. Of the different exhaust combinations I have tested over the last 2 years, it seems the center section affects resonance the most.
@niftyfivefifty does the current set up feel now like the “forever set up”? And can you remind us with Fabios catless headers did you need Trev or other to do the tuning or did the California guy you mention tune it all up? feels like out of all of us you might have the “finest” of fine tuning done?
Hey Eric, I haven’t done any tuning yet but it is on my to-do list to road trip down to CA and have the ECUs updated. As-is the car runs rich so I am confident there is even more power to be gained. I am not 100% in love with the 575 mufflers but they have potential. I have a couple modification ideas I am going to try to test soon.
I do not like X-pipes since they interfere with the extraction pulses from the engine and cost hp and torque. The H pipe is a compromise where the two balance tubes cut down on resonance without a big effect on extraction or hp. Some folks like the sound that comes from X pipes, but to me that is the only reason to use one except as a replacement for the OEM resonator/muffler/cork, which also has an X-pipe inside, but is way more restrictive..
I definitely get what you are saying about the science behind it, but if there is one thing I have learned about mixing and matching exhaust components on these cars, it is that the final result can be very different and unpredictable. Personally I would just try it. In my eyes, the inexpensive Supersprint x-pipe is definitely worth the test. And interestingly enough, my car is significantly faster with the x-pipe vs. h-pipe, and that was with less restrictive Tubis on the h-pipe.
Why would I try it when I already have Fabio's headers and cats, a working H pipe, uncrimped over the axle pipe, Superamerica HGTC exhaust, no resonance and a great exhaust sound and way more power? Like I said, no interest in an X-Pipe. Ferrari even gave X-Pipes up (went to straight pipes) on the OEM V12 exhausts starting in September 2003 and set up the mufflers to get rid of any resonance. I seriously doubt an X-Pipe gives more power than an H pipe with all else being equal.
So far 135171 has had four separate exhaust systems, three sets of wheels, and two sets of brakes, including ceramics. Not missing out on too much.
Hi Nifty. I agree with you. My 456M became soooo much nicer to drive with a Stebro X-pipe than the two straight pipes. It was like driving a Corolla or a M5. Sound 10x better. Great sound on both accelleration and deceleration when going off the throttle. That was with the original cats and no rear mufflers at all. No resonance what so ever. More power even at idle when reversing out of the work shop! On that car the sound was awful with the straight pipes. How is the «music» aspect of the sound with your current set-up? Is it loud at high rpm. and much throttle? Any videos? What was the reason you changed the OEM 550 center muffler with the Supersprint X-pipe? Just curious I might copy your set up one day...
I loved running x-pipes on V8s when I was younger, and thought it would be worth a try on the V12. The h-pipe always sounded like it was only 5000rpm at redline, and with the OEM center, low/mid powerbands weren't what I wanted them to be. The x-pipe has the best power, and also sounds true to the rpm. She sings at 8000rpm! The power is incredible, and it needs much more throttle control in wet/cold conditions. It is a completely different car now, but silent on the highway with the 575 mufflers. Life has been crazy with the kids back in school, but I am planning some videos very soon.
X-Pipes work fine on 90 degree crank V8s, like most American V8s (4 V twins on a common crank), but not really at all on flat crank V8s (two inline fours on the same crank) and cost you hp on a V12 compared to straight pipes. I still do not think an X pipe will give as much hp as a well designed H pipe, and proven not as much as straight pipes. X-pipes do sound different because all the exhaust pulses are mixed together.
Is there really now way to suppress the drone caused by straight pipes? I understant how the drone can be a pain, but I cannot quite get my head around conceding to lose HP either with a X or H pipe of any variant, only to reduce the drone. Has anyone ever tried to add a pair of "short" straight-through central mufflers?
Timmo- Ferrari eliminated the drone on the 575M and subsequent V12s with straight center pipes through muffler design. Once you go to 6-1 headers, though, those mufflers no longer provide enough damping to prevent the ~2500 rpm (and sometimes idle) drone. This thread is really about using Fabio's 6-1 headers. If someone springs for Fabio's entire system on Maranellos, no drone, but that includes an H pipe with very small balance tubes.
Sound for sure. Performance was similar, though that was a centrifugal supercharged V8 and it performed well with both options. Dave's Giallo 550 at the top of the page is probably my favorite sounding application of Fabio's headers, and it seems the winning recipe involves either 200 cell cats or a center muffler. My next iteration will be OEM center with valved straight pipes, similar to what @white out has on his 575. Fabio makes a set as well that look really nice.
So DZ96 has Fabio's 6-1 headers with cats, Fabio's rear mufflers and straight-through center pipes featuring a silencer each? Yes Taz, thanks, this is what I had undestood from the various reports posted on here. My question now is if there is a way to get rid of the drone without using either a X or H pipe of any sort, whilst using Fabio's 6-1 headers with his 200 cell cats, and valved mufflers, either Fabio's or the originals from the 550/575.
