Info wanted: keeping crackles and burbles through an engine mod

Risky, risky!!

Curious to hear some feedback about this too!

 

My 2012 has these sounds when you let off the gas but only when the valves are kept in the open position. It's a very early build so maybe that has something to do with it.

 

It does

 

Having heard Carlo's, I wouldnt risk it. Priceless sound.

 

Mine is a 2012 with the valves permanently open and sounds like that too.

 

That's because you're da Captain

 

Wouldn't risk it. hard or even impossible to reverse. it's one of three cars I know that actually has the old software

 

I think the sports cats would actually make the pops and cracks louder but not sure what ECU tune would do. As others have said it's probably not worth risking it; those pops are to die for! The standard performance is so insane anyway that an ECU tune is probably not needed, but horses for courses.

 

I'm waiting for my stuff :
- Novitec exhaust
- Novitec test pipe
- Fabspeed header
What is the best ECU for this combination, Evomsit or Novitec? Anybody has experience with ECU upgrade?

 

Both Novitec or Evosmit are reputable, however if memory serves me right a friend
put an Evosmit chip in his 2011 Italia and it kept the pops and crackles

best

 

No Exhaust will back the gurgle and pop. It's a function of the injectors

 

They are caused by unburnt fuel hitting hot exhaust components, hence the
increase in crackles when using 100aki fuel, and are due to the ecu's fuel map.

The more conservative and 'environmentally friendly' the mapping, the less pops.

 

The maestro has it nailed.

"Crackles and burbles and pops, et al" through the exhaust are the excess, unburned fuel heading downstream.

The primary source is the fuel overrun (eg. after wide open throttle, snap off the pedal). Different exhaust designs can "encourage" it (eg. Fiat 500 Abarth turbo - has a short, straight exhaust, our car does it a LOT...but more like burps and farts.). Old school carbureted cars, run slightly rich, did a similar thing (made the engine sound like it was coughing, after heavy breathing)

The 458 engine and control maps changed for 2012MY - fuel/ignition, gearbox and suspension settings. Some SW was a "campaign" on earlier cars, so SW and suspension HW was/is available as a paid "upgrade".

Most here will also know that 1) the more overrun, the worse the emissions and 2) if you look closely, almost all car ECU's allow the engines to "keep going" a bit after throttle release, to help burn off fuel in the cylinders. It's subtle, but there - it's not just a dead drop when the pedal is released. Some cars are set to do that more, some less (eg. Ferrari, Porsche). The ECU map(s) are the primary way to manipulate that effect today, though personally I like the sound of the engine ON throttle, whereas the crackles are the sign of an engine coming OFF throttle...(ha ha)

Our Speciale will do this, when driven hard (higher revs, aggressive shifting, heavy braking); the ECU will actually "learn" and adjust - eg. the magnitude of the engine blips will be different if I do a 4=>3 downshift while coming down from cruising at 60mph versus on my way down from 120, even if the speed I pick the downshift up at is identical. These cars are sophisticated, the software intelligence is amazing.

Of course, one of the "downsides" of the crackles and burbles is accelerated wear of the exhaust system components, but if you like it, it's like replacing tires and brakes, it happens.

 

Funny thing is my wife heard the crackles and gurgling while riding in the FCAR with me and asked me if I was farting.

 

LMFAO!!!!
What a post to start a Sunday with!
Thank you for brightening my day Mr. Kirk, true genius!!!
xoxoxo

 

Carlo my bro , I'm so happy that you are easily amused . It makes my day too.

 

Were you?


Car - 2013 Ferrari 458 Spider (Daily Driver)



Sent from my iPhone using Tapatalk

 

I was only harmonizing with the car.

 

+ C.K.

 

I think you will love this change. I did this on my car last year. My car is MY 2014 Italia. It now does make pops and crackles- Im not sure if its more or less than your 2010. I would also recommend you replace the stock headers which are restrictive. The NR headers are very expensive though. I went with Fabspeed headers and they line right up to the NR cats. Are you doing the 100 cell cats? I recommend that. Btw- the power improvement feels much more than 20HP. We didn't bother to dyno it but the before and after feeling of acceleration is quite noticeable. My mechanic says its got to be around 600HP- thats a ~ 40HP improvement. But don't get too hung up on the numbers. You will really feel it, especially full throttle shift into second gear.

Whats great about this setup is you retain the stock muffler and when the flaps are closed it is a little louder than stock but its effectively muffled and not obnoxious. However, when the flips open, mostly due to to those 100 cell cats (vs 400 stock) you will have something that's pretty darn loud. But the sound is glorious. And I also think NR fixes the problem I had with race mode. In stock form, its too easy to trigger the flaps to go between open/closed and it gets annoying to have the sound go from loud to muted, on and off frequently. With the NR software, race mode means the flaps are always open.

I admit I am heavily biased in this, but its the best sounding V8 Ferrari I've ever heard. And I wasn't much of a fan of the stock 458 exhaust sound. I always felt it could be loud but it lacked definition. And I didn't love how it dumped some of the sound via some kind of resonance tube into the cabin. I like my exhaust sound to come from the rear. These changes resolved all my issues and then some!

Now, I'd put the sound just behind a 250 V12 Ferrari (and I have good seat time in these cars!!) and yes even ahead of a stock 599 GTO. Thats just my opinion but the sound is just incredible. Its not just loud. Its detailed. Each RPM reveals a slightly different tone. And as you get to around the last 1,200 RPM the banshee wail becomes more and more metallic and raspy.

The power increase isn't too much for the car, but I also am riding on NR springs and spacers. I'd say you wouldn't want any more power otherwise you might be overpowering the front end too easily. I really love this setup and I recommend it to anyone who wants to make their car a bit "more".

 

!!