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Old 09-13-2017, 10:18 AM
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RV7A Flyer RV7A Flyer is offline
Join Date: Jul 2013
Location: US
Posts: 1,444

Originally Posted by Captain Avgas View Post
The end result is that most fuel injected RVs have a relatively coarse 125 micron filter upstream of the boost pump and the only other filter is the Precision servo filter which is approx 70 microns. In other words coarse debris will lodge in the AirFlow filter and finer debris will pass through and lodge in the Precision servo filter.

Andair fuel filter is 62 microns.
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Old 09-13-2017, 10:25 AM
Ralph Inkster Ralph Inkster is offline
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 333

Originally Posted by Bevan View Post
Can anybody post a source for a 30 micron cleanable/inspectable filter and suggest a suitable mounting location/method in a FWF (hot) environment?

Bevan, you should have a Gascolator (Canada eh?) after your boost pump, this should catch & illustrate any debris before it becomes an issue down stream. Is it a good idea to string a series of filters to protect a filter?
Maintain lots, upgraded & repaired some, modified more, rebuild a few, & built 4 of 'em
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Old 09-14-2017, 12:53 AM
Bevan Bevan is offline
Join Date: Sep 2007
Location: BC
Posts: 1,491

I have one gascolator in each wing root, about 75 micron if memory serves correct.

RV7A Flying!
O-360-A1F6 (parallel valve) 180HP
Dual P-mags
Precision F.I. with AP purge valve
Vinyl Wrapped Exterior
Grand Rapids EFIS
Located in western Canada
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