Engine condition monitoring diagnostic tester project

[Andrew W. Macfadyen]

Interesting crankcase pressure is a pretty good indication of a broken
compression ring, some manufacturers recomend bourdon gauges which fit on to the
breather system to monitor this, for in race monitoring it could be very
useful  as you tell  the driver to back off so the car makes it to the finish
but for street use I would need to try it before making up my mind as I  suspect
the tell tale signs of oil leaks everywhere would be apparent. A fuel pump
tester or  boost gauge should have about the right range.

Robert Humphris wrote:

> I read in my favorite magazine ( Cars and Car Conversions ) that the
> TOCA Renault team log the crank case pressure as well as all the other
> odds and ends that the likes of us mortals would think to log...
> apperently they have collated data which indicates that crank case
> pressure tells you more about the state of the engine in conjuction with
> the other readings than just by the readings alone.  If the engine is
> about to let go and do something spectacular the CC pressures go wild...
>  Obviously they were not much more specific, but its something to bare
> in mind
>
> Rob Humphris
>
> >----------
> >From:  Andrew W. Macfadyen[SMTP:am018 at post.almac.co.uk]
> >Sent:  28 May 1998 09:09
> >To:    diy_efi at efi332.eng.ohio-state.edu
> >Subject:       Re: Engine condition monitoring diagnostic tester project
> >
> >Thanks to all that replied to my original posting -- I have found a
> >transducer used for engine oil pressure that may have enough capacity to go
> >to the  14 bar FSD  or so that I need.
> >
> >Andrew W. Macfadyen wrote:
> >
> >> I am building an compression tester/Leak down tester to interface to a
> >> PC and log the compression curve and leak down curve to enable piston
> >> and vavle condition to be monitored and compared.  Anybody got any ideas
> >> on suitable low cost pressure sensors.
> >
> >
> >
> >
> >