Re: wastegates: S4 vs MC 10v

[Mike Loeks <mloeks@columbia-center.org>]

At 07:40 PM 10/31/96 -0500, you wrote:
>        Just wondering what the difference is beteween the the two systems.
>or is there any at all????
>
>        thanks, BOB
>
>
Big difference. MC engine controls the W/G by applying manifold pressure to
bottom of W/G diaphragm as well as to the top of the diaphragm through the
frequency valve. Stiffer W/G spring = More boost

The 3B engine controls the W/G by applying boost pressure to the bottom of
the diaphragm through the frequency valve. Stiffer W/G spring = No
difference in boost. The 3B engine also has a turbo bypass valve.
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               Michael Loeks
               '86 Audi 5kcstq - Red w/ Fuchs/D60A2 1.8 bar boost
               '85 Toyota Celica GT-S Convertible 
               '84 Ford F350 dually flatbed (For Sale soon)
               Warren, Oregon


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