458 Can someone explain the stock 458 Valve operation, installing a Forza controller!

My controller was installed by taking the airbox off only
That gave the tech enough access to do the job

 

But is yours Italia or Spider? My understanding is the working areas are not the same.

 

Italia. I see now how this would not work on a Spider.

 

For anyone still considering the job, here's a quick video I shot for my Italia. Didn't have to remove the rear bumper and everything works perfectly.

 

Just installed. https://youtu.be/eIaFJHNh-MA
No need to remove rear bumper. Didn’t even need extensions. 4 hrs.

 

Great to have a new video specific to a Spider, thanks!!. This thread now has 3 confirmations of being able to do the job on a Spider w/o bumper removal. However I suspect it is possible that removing the bumper might still be a smoother process. Maybe it's a six-of-one vs half-dozen of other situation. I need to get around to this soon.

 

You can loosen the air box on a spider and shift it slightly to get access to it. It’s a 30min job.

I recently installed Larini club sport cats and there entire job took me 2 hours. All done from the top of the engine bay.

I’m probably faster as I know where everything is given I have worked on the car many times.

The only time I took the bumper cover off was to take the original exhaust out as it’s huge and was stuck together. After that the Capristo exhaust that I installed can come out without removal of the bumper cover.




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A Youtube video shows you can disconnect and plug the single vacuum line that goes to the solenoid before it splits to the valves and get the valves to stay open all the time. Does anybody know the approximate inside diameter of that line? I am considering putting a ball valve in that line, so the ball valve can be closed to run the exhaust valves open all the time, or the inline ball valve opened if somebody wanted the stock exhaust operation.
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Could you pls link this particular video? Thx!

 

Make the FERRARI 458 SOUND INCREDIBLE for FREE with this simple DIY TIP - YouTube

 

You are probably well past needing this info now, but thought I'd answer while I'm amidst doing the same thing. ID of that line is 4 mm.

 

Spent several hours trying to remove those hose clamps from hell to remove the plug for the valves to restore to stock connection. Just did everything without lifting the car. (Valves were plugged/ always open). drone from being always open was killing me. I couldn’t even cut the crimp with tin snips, it just squeeze between the blades. No hope at all for any of those little pliers/bullnose cutters.

 

If you can get or borrow a pex tubing crimping tool, they will cut off the oetiker clamps with ease. Just cut across the crimp ears and set the crimper to cutting. You can reinstall the clamps with the pex tubing crimper as well.

 

To revive an old revived thread…..I just did the valve unplug thing yesterday. Most people say to unplug at the valve but, instead, you can just disconnect and plug the hose that is in the middle, connected to a hard vacuum line. That hose the splits to the individual valves. Cuts a simple job in half.
After having the valves open all the time now is great for short trips. I’ll be installing the Forza controller before I make any journeys longer than 200 miles though.

 

The properly installed Forza give you 3 selections regarding valve control.1, computer controls valves, as designed open around 4K RPM. 2, always open no matter speed. 3, always closed no matter the speed.

 

Id like to install the controller but not take off the rear bumper.