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Old 12-26-2016, 03:57 AM
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Default Accusump install and oil filter question

Kicking around putting an Accusump under the hood over the winter. One question that's bothered me is what happens when the oil filter is pressurized in the opposite direction when prelubing the engine prior to start-up. Do the pump gears create enough restriction to prevent just back-flushing trash out of the filter and pushing it back into the pan? Or, will the reverse pressure swell the internal filtering media and possibly weaken/damage it?

Am I over-thinking things, or just over worrying?

Thanks for any constructive info.
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Old 12-26-2016, 10:12 AM
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Don't know/can't say if over thinking/worring too much. I did recall it should be pressureized @ normal running pressure, so had to take a look at my files. [My acculumulator is awaiting install too]:



Could plumb directly to the oil galley. That gets it where you want it, but the pump could still be there. Covers the bearings for sure, maybe not the top end? Could be a little more work and chance for a WIAT* though...

Cheers - Jim

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Old 12-26-2016, 12:18 PM
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I was curious too. The PDF instructions show a check valve.


Fig 2.

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Keep us updated on this upgrade. I'm interested to hear more.
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Old 12-26-2016, 07:32 PM
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I was curious too. The PDF instructions show a check valve.


Fig 2.

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Keep us updated on this upgrade. I'm interested to hear more.
The problem with a check valve is that there needs to be more external plumbing to put the valve in the Tee line. I just want to run the line from the Accusump to the threaded port above the oil filter boss. I need to do some additional research, and I'm curious if there's a PF-25 filter version with a checkvalve in it.
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Old 12-26-2016, 07:50 PM
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I have one installed and if you don't use any kind of one way valve, they oil flows backward.

To note is that the one way valve that Canton supplies is a serious restriction to oil flow. I ended up using a ford filter that prevents reverse flow. Works like a charm.

Oh and connect the accusump in between the filter and as close to the block as possible.
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Old 12-26-2016, 10:18 PM
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Might be a good time to add an external filter and oil cooler. I don't like the idea of back-flowing the filter either.
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Old 12-27-2016, 03:01 PM
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Quote:
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Might be a good time to add an external filter and oil cooler. I don't like the idea of back-flowing the filter either.
Forgot to mention that : a remote mounted filter.
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Old 12-30-2016, 03:38 PM
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You know this additional oil adds weight - you'll have to diet.

This may not pass the constructive info test but my friend has a Rolls Merlin powered ride that uses a pre-oiler.

Happy New Year
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Old 01-03-2017, 04:43 PM
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I was curious how the cost of the accusump compares with a dry sump system, and according to this article it is roughly $500 compared to $3500. Ouch.

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I just grabbed the kit cost from jegs for the accusump.

A used pan and oil drive tank would probably drop the price of a dry sump a lot.
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Old 01-04-2017, 02:08 AM
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Found a couple filters with anti-drainback valves (according to the Summit website). The Wix 51060 and the AC 19187301 appear to be some parts to try. Just for amusement I think I'll e-mail Wix and ask if higher reverse pressures (during pre-lubing) cause any durability issues with the valve, and typically what is the forward pressure drop across the valve.
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