V12 SOUND...

Franco- Likely a Capristo system. Full system including headers for the LP640. Here it is. No crossover pipes, though, so careful because it may sound like two six cylinders.

355s already sound awesome, Capristo makes it even more so. Maranellos sound great with Kreisieg or Capristo. plus a few others. The Kreissieg seems to be slightly higher pitched.

http://www.capristo.de/

http://www.vividracing.com/catalog/capristo-exhaust-system-ferrari-355-gtb-gts-spyder-9499-p-63148.html

http://www.youtube.com/watch?v=_qtd2yxvVR0

Taz
Terry Phillips

 

The white LP has a Kreissieg, the car is from Seoul.

 

Terry,

There are many owners who don't appreciate this. If they would only explore that region above 6,000 RPM where not only are the muffler valves open, but the short induction runs of the variable length intake manifolds become active and the car gets its "second wind," they would hear that 12 cylinder music you mention. Those "on the gound" would hear the full Doppler effect.

With the straight center pipes, my 550 gets the same "12 cylinder purr" you enjoy at cruise.

Barry

 

TR 's are not a good candidate for this sound are they? I do like them. My 355 had a stock exhaust so it did not have that sound. The other problem is that you need high rpm's to get that sound as well.

 

Barry- A lot of people do not use those kinds of revs often. Mine sees 7000 rpm nearly every time I drive it. They really come alive when everything is open and the intake manifold is optimized for power and revs. The sound is awesome with the set-up we have, and with most others, too, at those revs.

Hard to hurt a Maranello, either, as long as it is warmed up. On the 575M redline is 7500 rpm, and fuel cut-off is 7600 rpm. Could go much higher safely. Same redline on the 550, but I have not looked up the fuel cut-off limit.

Taz
Terry Phillips

 

Right.

 

Barry, Franco- That is one reason the 599 sounds so great, redline 8250 rpm, limiter 8400 rpm. Not sure what the limits are on the LP640.

Taz
Terry Phillips

 

Terry,

I've explored the rev limiter region on the track. When the engine sputters, I've noticed the needle in the 8,000 RPM area. I've done that in third gear on straightaways, accelerating to that point. You begin to notice a drop in torque before then. It all happens the way the dyno graph pictures it.

And yes, these engines can safely rev higher, but they're set up and ECU controlled differently than the F1 engine on which they were based.

Barry

 

And Formula 1 cars sound the way they do because of their >16,000 RPM redlines. It's all a function of RPMs and compression.

Barry

 

Barry - Could not find the limiter speed for the 550, but the intake manifold is fully set at 5640 rpm. Both bypass valves are open way before that, but no number quoted. 2720 rpm and 64% throttle for the 575M. The 550 is likely a similar number and WOT.

Taz
Terry Phillips

 

Terry,

The 550 WSM states:

Maximum Engine Speed: 7500 rpm
Maximum Power Engine Speed: 7000 rpm

Remarks concerning the rpm limiting device and ECU are attached below.

But dyno graphs for the 550 in 5th gear typically show fuel cut-off at ~7600 rpm.

So when I start sputtering in third gear, I might be exceeding 7600 rpm a bit. It happens fast and I just get a quick glance at the tachometer. I guess it's more like 7650-7700 rpm that I'm seeing.

But the car sure is sweet in the 6500-7000 rpm range!

Barry
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Here's a couple of 550 Kreissieg videos that kind of sound like F1, but I personally don't care for them. Too loud for my taste. The cops will hear you coming a mile away.

http://www.youtube.com/profile?user=kriesmaster#p/search/0/ovnXKY_OjWw

http://www.youtube.com/profile?user=kriesmaster#p/search/1/LpNM8t5tszM

 

Gary- I am pretty sure that car used catalyst replacement pipes. Catalysts would make it quieter, hopefully without completely destroying the high pitched scream. Have heard one on You-Tube somewhere with the catalysts still intact. Still sounded good, but not as loud. Bypass valves tone it down quite a bit, too, at least until they open. In general, the Kreissieg systems on Maranellos sound pretty good.

Barry- I saw that 7240 rpm number, which is obviously wrong. 7600 rpm would make sense. With fuel cut-off, the engine is going to rev a little further if accelerating hard. The 575M rev limiter is fairly soft, so bouncing off it occasionally is not too scary.

Taz
Terry Phillips

 

My 550's rev limiter kicks in around 7,600 on the dyno.

Also- there's a very noticeable power spike at 6,500 when the variable intake opens up and then the power peaks
around 7,200 and then starts to drop off as the revs climb to redline.
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Maranello with Novitec and x-pipe.

http://www.youtube.com/watch?v=xIdLWQ4uVjw

It has a deeper sound than in the video,...

 

Can vouch!

 

John- Sounds familiar. Wonder why? Still miss that exhaust, but my wife and neighbors do not.

Taz
Terry Phillips

 

F456M- Completely new head design, variable length intake runners, higher compression ratio, wilder cams, bigger valves, higher redline, etc, etc. Incidentally, John's 550 with the Novitec and the X-Pipes sounds just like my 575M with straight pipes and the same exhaust. Exactly the same exhaust.

Taz
Terry Phillips

 

My neighbors now want to know what planet the 550 came from (I tell them Planet Taz). Some on my quiet street love it,... others, well, just don't quite appreciate the sonic siren song emanating from that glorious V12,...

 

John,

Check your email and call me tonight on my cell up to 11:30 PM. I have another prototype front plate clip to check fit on. If I can stop by tomorrow?

Sorry for the hijack guys. Motoair's PM box is full and cannot accept more PM's

Bob R.

 

wow that sounds so exellent