[Fot] Charging a new accusump?

[fubog1]

I do the initial charge on the bench.
Pull the schrader valve & oil control valve, blow the piston in with a shot of compressed air, then use a small funnel to fill it. A small tube down the funnel will vent the air so it fills quicker.
Refit the air & oil valves and charge the air to 60 psi or so & It's ready to fit.
Leave the engine oil level a quart or so low initially, run it, shut down, dump the oil charge, and set the air pressure. (I leave the oil level a quart low so when the accu charge is dumped, the cranckase isn't grossly overfilled)
Restart to refill accusump, top off oil level, done.
Note that this start is the only time that the engine is ever started without pressure to the system prior.
Also the electric valve WILL bypass a certain amount of oil to the accusump when its oil charge is low, even with the switch off.
HTH
Glen

 

 

 

-----Original Message-----
From: Bud R via Fot <fot at autox.team.net>
To: FOT <fot at autox.team.net>
Sent: Fri, Dec 1, 2017 1:19 pm
Subject: [Fot] Charging a new accusump?

Listerati,

I’ve got a question about how best to charge a new accusump. I replaced my old one because I feared it might have been compromised with some shrapnel from blowing up an engine and the fact it was a few decades old.

I’m trying to minimize the engine being started without oil pressure as much as possible. I’d like to keep it to two times. I had to start it once (to break in the new cam and lifters) without charging the accusump because I wanted to catch any “stuff” from the new engine in the K &P reusable oil filter and didn’t want the new accusump to be involved in case there was metal particles, etc. as a result of the first running. Fortunately there was none, except a tiny tiny piece of gasket that had escaped all the cleaning and block cleansing that had been done.

Now I’m ready to do one more start up and my plan is to run it so that the oil gets filtered one more time and while it is running to flip the switch (it has an electric valve)  to the accusump (2 quart) to fill it up and pressurize it. 

Question is, should I add extra oil initially before the start up (which means it will be 2 quarts over full) or fill it up once I throw the switch while the accusump takes 2 quarts of oil from the existing oil in the system?

My concerns by are using the former method overfilling can cause problems and the latter method means the system might be low on oil until I can quickly pour another two quarts in.

What to do? At this point I’m leaning towards the latter method.

Thanks
Bud Rolofson

Extreme Parts Racing (more than just a haircut)

71TR6 CC57365 (Good 6)
71 Spitfire MK IV Race Car #3
69 Spitfire MK III (back up FE engine/dinghy car)
93 Minnie Winnie Race Support Vehicle 
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)

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