|
Blow Off Valve????
Can anyone shed some light on the application of the blowoff valve? I know what its for. It works like a wastegate on a turbo. but is one required for my application? When I bought the car from WELD MOTORSPORTS it did not have one. I am in the process of re-doing the air intake plumbing and supercharger bracketry. I am just wanting to know if I need to install a blowoff valve to regulate the boost or can it be done with different sized pulleys? Any feedback would be appreciated!
Gary Mirabal:confused: :rolleyes: |
You would typically use different pulleys to adjust boost on a supercharger. A blowoff valve usually isn't used like a boost controller. It's typically there to protect the throttle blades from high backpressure when you let off at higher RPM's. Most folks don't run a blowoff valve unless they're over about 6 PSI of boost.
|
Gary,
The blowoff valves are typically used on road race cars or small engines with turbo's. The blowoff valve would release pressure and is usually routed back to the front of the mass air meter on EFI cars so that the computer sees a closed loop of air for proper fuel management. This aides in on/off throttle and reduces heat and lag in small engines. A mechanical supercharger does not need it, you would also need about 4 of them to pass the volume of air in your MONSTER motor if you wanted to use them. Perry.:cool: |
On a mass air car, the air would be re-introduced AFTER the mass air meter, not in front of it. If you reintroduced the air in front of the meter, you'd be "re-measuring" air that never entered the engine.
In the case of a mass air setup, the proper term for the valve would be a "bypass" valve, not a blow-off valve. The blow-off term implies that the boost is released to atmosphere, like would be typical in a speed density type of EFI (which I'm guessing is what Gary has). |
THANKS FOR ALL YOUR HELP......
Thank you Gentlemen, for all your inputs . I didnt think I really needed on but if I did I wanted to make sure I plumbed for it.
Gary:) |
| All times are GMT -7. The time now is 02:49 AM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: