boost guage and zener diode questions...

[Grant Lenahan]

Yea, I was also thinking that 3/14.7 ~ 0.2 so = 1.2 bar.

Grant
On Jul 11, 2006, at 7:36 PM, Alex Kowalski wrote:

> Jason wrote:
>
>> i ask cuz i finally got around to hooking up my
>> aftermarket boost guage, and the numbers
>> certainly are not jiving.
>
>> in fact, they're not even consistently not
>> jiving.  sometimes the digital guage will show
>> 1.2BAR, and the new guage shows 3psi, while other
>> times it may show 6psi.
>
>> weird.
>
> Nope, it's working perfectly.  Atmospheric pressure is 14.7 PSI and the
> dashboard boost gauge reads manifold pressure with the atmosphere = 1 
> BAR.
> That's why it shows less than 1 BAR when the throttle is closed, 
> indicating
> vacuum.  Therefore 1.2BAR on the dashboard is about 3 psi of boost and 
> you
> shouldn't see more than about 8 psi before you hit the fuel pump 
> cutoff. ~ 6
> PSI sounds about right for an MC1 that is functioning relatively 
> normally,
> that would be 1.4 BAR on the dash gauge.
>
> Zener help in Canada is going to have to come from someone else...  ;)
>
> Cheers
> Alex Kowalski
> '87 5KCSTQ
> '86 5KCSTQ
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