Tony, thanks for the reply. I've not only printed to have a copy for my
toolbox, but also copied the mailing list so that others get a better
understanding of Accusumps. Cheers, Brian
>
>It was great to hear from you. The following is a brief, summary description
>of how I have used the Accusump in my TwinCam's.
>
>From the beginning:
>Before first startup of a new engine, the accusump is empty of oil, and I put
>the Mecca specified air pessure( from memory, its 7 psi, but I look up the
>book to confirm) into the chamber behind the sliding piston.
>The engine itself is then brought up to pressure with the accusump valve
>closed, via an electric drill driven rig that I made.. this ensures that the
>lines, cooler, stock filter body etc are full, and I have seen 50-60 psi on
>the gauge. (by the way my relief valve is adjustable. via a threaded hole,
>bolt, locknut and pusher pad, and is set for 75 psi)
>Then I fire the engine, which comes immediately to 75 psi.
>Then I crack the accusump valve a bit and fill its chamber while watching
>the gauge... never letting it below 50-60 psi... this takes a minute or so
>(feels like days) but I don't want to starve the bearings while I put the 2
>US quarts into the accusump.
>Then I stop the engine and add the 2 quarts to bring it to level.
>Now it is stable.
>Prior to starting, I open the Accusump valve fully... the system is now
>pressurised and I crank and fire up... its true the engine sump overfills a
>bit during this process, but we are at cranking speed or low RPM and there is
>a high percentage of anti-foam additive in race oils so it doesn't cause a
>problem even if the crank hits the oil... we have now avoided bearing wear on
>startup, and the accusump refills, thus getting the sump back to where God or
>MOWOG intended.
>Now that we are running, we are ready for the first corner, where if oil
>pressure starts to fall, the accusump makes up the difference... yes the sump
>overfills a bit but see above re antifoam..... when race ends......my idle
>pressure is around 40 psi (big Pump)... before shutting off I rev the engine
>till the gauge gets to 70+ psi (not many revs ) and then close the Accusump
>valve... thus the sump is back to level and the accusump has its beloved 2
>quarts
>Its not very high tech, but by golly it works.. if you don't have a cornering
>problem as seen on the gauge... there seems to be a lag time in the
>pipe/gauge system on most British cars....I'd guess there is at least some
>problem, say in corner 3 at Mosport
>As well, a huge amount of wear occurs every startup, and you can remove
>thisproblem
>If I sound like a fan of Accusumps, its true... but for a few hundred dollars
>I'm convinced its prevented multi problems
>Send me an E-Mail or call to discuss if you like.
>Regards
>Tony
>
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