FWIW my 2.1l waterboxer goes into the low twenties in those conditions.

Yrs,
d

On Thu, May 24, 2018 at 7:43 PM, Stan Shapiro <mail@stanshapiro.com> wrote:

> Anyone know, or can estimate, what my manifold vacuum should be on a rapid
> decel (throttle closed) from 3000 rpm.  I think it is supposed to go up.
> Any Idea what it goes up to??  I am trying to figure out my decel valve.
>
>
>
> 77 baywindow camper
>
> Rebuilt 2 liter, fuel injected.
>
>
>
> stan
>