Triple exhaust pipes?

It is to pay hommage to the F40


Your middle one is probably collecting more soot because both left and right bank mufflers feed into that one outlet.

 

the middle pipe collects more soot because with the stock exhaust valve operation setup
the exhaust gases pass thru the middle pipe at idle and at sub 3k rpm (the exhaust is in 'silent' mode), the valves open at rpm's higher than 3k when one steps on the gas and when one is going at higher speeds at the exhaust gases are then directed to the two bigger outer pipes (the exhaust gets louder)

if u install a capristo exhaust bypass system the valves are constantly open which means that the exhaust gases continuously pass thru the 2 outer valves even at idle and at low rpm's (sub 3k), which generate less deposit in the middle pipe and makes the car considerably louder

btw i live in california and have access to 100 octane racing fuel which not only greatly improves the performance of the car (imho) but also burns way cleaner so there is i would say 70% less deposits in the exhaust tips after a driving session

 

458trofeo, where do you get racing fuel at?

 

here is a useful website listing of all gas stations in california and nevada that have 100 octane at the pump

i live in los angeles and get mine either from the brentwood union 76 or the agoura hills 76 they carry the sunoco gt 100 which I prefer to the VP 100, i think the sunoco gives more power than the VP and increases the clarity of the engine sound

i run my 458 all of the time with 100% 100 octane in the tank and she loves it! will never go back to 91 provided the 76 gas stations or other stations in my vicinity keep selling 100

ps aside from increasing the power of the car there is also way less deposit in the exhaust tips than with 91

let us all know if you find 100 octane and if you feel it improves performance, i do!!!

Unleaded Race/Racing Fuel at the Pump in California

 

just to get back on the topic below are pics of mine with the oem titanium exhaust pipes: highly recommended!
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It's for the exhaust note. The one in the center opens up to let out more sound. Because it's closed part of the time, it picks up more soot.

It's also a throw back to the F40 as stated earlier. In effect, it's just to be different.

Having this type of exhaust gets around the regulations that it's not too loud at idle but still let's it sing at full song when moving quickly.

 

I believe that the outer exhausts have valves. The center is always open.

Excellent pics of the stock and Akrapovic mufflers in this thread:

http://www.ferrarichat.com/forum/458-italia/407246-akrapovic-ferrari-458-exhaust-before-after-pictures-videos-dyno-hg-motorsports.html

 

Well, it was a 50/50 guess.

That exhaust BTW is just plain awesome. I've seen it up close at SEMA. Those guys know now to make some pipes.

 

To clarify:

The 3 exhausts pipes are, in fact, never opened all at once and the middle smaller pipe does not to make the exhaust louder. It is in fact the opposite: the middle smaller pipe is there to make the car comply with noise regulations on the street.

Here is how it works:

In a stock car the exhaust valves automatically open and close according to a factory preset as per below:

At idle or at lower than 3.5k rpms in sport mode or 3k rpms in race mode the exhaust valves are ‘closed’ to comply with noise regulations (not to be too loud in say traffic situations or when driving slowly in populated areas), this means the exhaust gases then pass thru the middle smaller pipe only, the two other large pipes are closed.

When stepping on the throttle and summoning revs and acceleration the exhaust valves ‘open’ above 3.5k in sport mode and above 3k in race mode to make the exhaust more freeflowing and have a louder sound (to add driving enjoyment, performance and because it is assumed that one drives faster in less populated areas like open roads or freeways), this means the exhaust gases then pass thru the two larger pipes only, the middle smaller one is closed.

This explains why:

The 458 challenge cars do not have a smaller central pipe because they operate only on race tracks and do without much noise regulations.

People (like me ☺ ) buy aftermarket exhaust bypass system that can bypass the stock valve setup and have the exhaust valves constantly ‘open’ even at idle and low rpm’s making the exhaust gases only pass thru the bigger outer pipes 100% of the time and making the car loud all the time and a public nuisance (just kidding lol)

^ this is also why i never get soot in my smaller central pipe: the gases never come out of it because i always have the valves open 100% of the time with my capristo bypass system and the gases pass thru the 2 bigger ones 100% of the time

 

I didn't see them at SEMA last year but the pics show some gorgeous fab skills. The Capristo stuff looks really nice as well. I may like their solution even more although it isn't quite as pretty IMHO.

I don't see a valve on the smaller pipes to close them off. It may be that because of their position and size they flow very little exhaust when the larger valves are open. I guess it would only take a minute to start up a car and have someone rev it over 3500rpm with your hand in front of the middle pipe to tell.

 

The dealer installed the capristo unit for me, i dont think that the warranty was affected but as a 2010 model it may have expired anyway, i strongly recommend the capristo unit though and could not imagine driving the car w/o it, it's also great because u can select to go back to factory valve setting at anytime or drive with the valves always open (as I do )

 

u have to order it from ferrari, ur dealer can order it for you, or maybe ricambi america can get u a better price if u order it thru them, post pics if u decide to install it, not many ppl have installed it and i dont know why, as for me I couldnt stand the puny looking metal stock ones...

 

great! let us know when you have completed the mods and post some videos/pics
cheers!

 

Fabspeed offers an excellent bolt on replacement dual tip for those who do not prefer the triple outlets
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Re High octane fuel, I doubt that octane over 93 ((R+M)/2 measure) will give a noticable change in performance.

 

is there any tangible data to prove this?
my car feels very noticeably more powerful on 100 octane...

 

458trofeo, next time I am near LA I will try and let you know! Thanks for the link!

 

cool thx!!