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Re: Cylinder head Posted by SWEDECAR [Email] [Profile/Gallery]
(more from SWEDECAR) on Thu, 19 Sep 2013 07:33:26
In Reply to: Re: Cylinder head, Rob T, Thu, 19 Sep 2013 03:56:08 Members see ZERO ads on the bulletin boards and get more feature. - Help Keep This Site Online - Signup |
Stickshift cars don't have them and older engines were better built and had a better fuel injection system so that they created enough brake vacuum boost without having doodads like that.
Now in the name of emission hysteria and electronic throttle bodies, the idle up at cold start is so high that very little brake boost vacuum is created in intake manifold and they need to add stuff like that.
Anders

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