Question about Exhaust Bypass Valve Operation - Ferrari Life
 
LinkBack Thread Tools Display Modes
post #1 of 4 Old 06-25-2014, 08:30 AM Thread Starter
Owner
 
bisel's Avatar
 
Join Date: Jul 2012
Location: Scottsdale
Ferrari Life Posts: 419
Question about Exhaust Bypass Valve Operation

This may have been asked before, but I have not been able to find this specific information.

With respect to the Exhaust Bypass Valves, can anyone answer the following:

What is the default state of the exhaust bypass valves (engine off, no vacuum to the valves)? Are they open or closed? (On the 360 and F430, they are open)

I assume the initial state of the valves when you start the engine and vacuum is available to the bypass valves is that they are closed. At engine idle, if you disconnect the electrical connector at the vacuum solenoid valve, will the valves open or remain closed? (On the 360 and F430, they will open)

I am trying to determine if the 458 is the same as the 360/F430. Thanks for any help you can give me.

Kind regards,
bisel is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 06-25-2014, 10:24 AM
Owner
Elite Member
 
tazandjan's Avatar
 
Join Date: Aug 2011
Location: Albuquerque, NM
Ferrari Life Posts: 11,846
Steve- 360 bypass valves are fail open, which means with no vacuum, they will eventually open when the engine is shut off. Residual vacuum may keep them closed for a while. On a 360 to keep them open all the time, the vacuum hose ends to the pneumatic valves are removed and the hose ends plugged.

Maranellos are the opposite.

Taz
Terry Phillips

Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125

Every day I look around, and if nobody is shooting at me, it is a pretty good day.
tazandjan is offline  
post #3 of 4 Old 06-25-2014, 11:08 AM Thread Starter
Owner
 
bisel's Avatar
 
Join Date: Jul 2012
Location: Scottsdale
Ferrari Life Posts: 419
Thanks, Terry. Do you happen to know if the 458 is more like the 360 or more like the 550/575?

Regards,
bisel is offline  
 
post #4 of 4 Old 06-25-2014, 02:30 PM
Owner
Elite Member
 
tazandjan's Avatar
 
Join Date: Aug 2011
Location: Albuquerque, NM
Ferrari Life Posts: 11,846
Steve- More like the 360/F430.

Taz
Terry Phillips

Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125

Every day I look around, and if nobody is shooting at me, it is a pretty good day.
tazandjan is offline  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
Copyright 2012 ONE Media, Inc.
FerrariLife is independently run with no affiliation with Ferrari SpA
Ferrari for Sale | Maserati for Sale