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Discussion in '458 Italia/488/F8' started by bisel, Feb 28, 2016.
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I have not noticed a drone while driving. I will pay special attention to it today.
I expect the Turbo may muffle any droning , but that's just my opinion.
The good thing about disconnecting the bypass valves is that it's simple to put back the way it was. AND, if you ask , you can have a rubber line T'd into the vac line, routed up into the engine compartment , so you can " plug " or "unplug" it when you want.
We don't charge any extra to do it. Not as fancy as the Capristo , but just as functional.
Yes, several people have installed the Forza bypass valve switches on 488's and Cali-T's
NO doubt about it Carlo: the 458 sounds WAY better; no special exhaust system (plus straight pipes) will bring a 488 to that level ever ...
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One of our FerrariOwnersClubNL members now has the first delivered Akrapovic exhaust installed ....
Listen .... two spotters captured it ...
How hard is to access the vacuum lines? Someone indicated it requires rear bumper removal and maybe another body part?
Not sure of the correct answer. But, get down under the rear of the car and determine if you can see two vacuum lines going to the exhaust systems (one for each). Can you trace the lines to the diaphragm actuators? If not, can you easily remove the air diffuser? This might give you better access. The diffuser should be pretty easy to remove vs. the rear bumper. Let us know what you find out.
That yellow 488 looks like it has buck teeth in the video. I would wrap them black or carbon fiber.
So I took my 488 to the dealership and asked them how hard and what had to be removed to access the vacuum lines so that the bypass valves could remain open. Some had mentioned the bumper had to be removed and the rear diffuser too. I was told just the rear diffuser had to be removed. 1 hrs of service and it was complete. Much happier now. Sounds so much better. No annoying open close open close. Startup and warm up sounds great too. No highway droning either. Driving at low speed low rpm sounds great too.
at low RPM's that 458 sounds atrocious...like a chevy small block with a bad carburetor and a hole in the muffler
I think in the 488, the position of the exhaust valves have not a big impact of the engine noise in the cabin. Because the 488 is fitted with the sound generators, the vaccum plenum is connected to the cabin.
See the video at 24:18 in the cabin and 24:39 outside, simultaneous filmed, you can hear brieffly the noise with the valves opened and closed
Or a Forza Componenti, offered by the OP.
Awesome post! Thanks for the education!
On my 488, I paid about $550 for the Capristo bypass. Unfortunately, the selonids wire connections are about 10mm too far inboard for easy grabbing so the bumper has to come off - otherwise it would have been as difficult as unplugging a lamp and replugging it in. Didn't want to risk the paint so I had the dealer do it for $350. Everytime you start the car, the vacuum closes to valve so you must use to switch to open them. However, on my wife's 2016 Cal T, I removed the rear tires and back liner, plugged the vacuum lines and within an hour had the valves open - for free. Woudl do the same with the 488 had I realized how easy it was and that the valves should be open all the time. Turbo cars don't need backpressure like normally breathing engines, so there is no power/torque loss.
Just installed Steve's (Forza) bypass controller in my 458 and it's excellent. A much needed upgrade.