Yeah, my plane has been an off road racer for years now, learnt that lesson. Other than at my local parts suppy store, blokes in there have been told they have to fly with me, That way if they sell me crap parts their ass is on the line also. Actually phoned PWR on friday, they dont have charts for their coolers either. I really dont know why its so hard to get the info needed. Just seems like manufacturers dont flow test the products they’re selling anymore. Our tractor mechanic has a hydraulic test bench, I’m going to see if I can use it to test cooler flows before I install next one the plane. Its not hard, just need pressure gauges & relief valves on both sides and flow meter between. just wanted to filter out all the crap coolers first as it seems price has more to do with the brand stamp than effectiveness of operation. Stock mazda coolers seem to be worst of the worst, its a wonder anyone has had success with them, with majority of oil returning to the oil pan through the front cover valve, that valve should only ever operate to protect components in case of blockage, rear iron valve is for regulating pressure..
Andrew,
Forgot to tell you that these days if you go to PWR
remember it is NOT FOR AIRCRAFT!!! They used to be cool about it
but recently they have changed their policy. Off road buggy seem
to be OK. Neil.
Just got around to plumbing in mechanical gauge
before cooler to see whats really happening with my oil flows,
wish I’d done it years ago! Learnt so much in a couple of
minutes on things that I have wasted so much time second
guessing. my second attempt oil cooler did work better than the
original mazda cooler, but was atrocious overall, Pressure drop
was about 60psi at 1400 prop rpm. No wonder I cant cool the oil,
bugger all is going through it, just enough to give me about
80psi oil pressure.
Ended up bypassing cooler all together to confirm
it is the cooler that is problem not lines or anything else,
well what a diference pressures constant at 78psi at all rpm’s
Trouble is no cooler manufacturer here seems to
have charts of flow & pressure drop on their coolers, very
frustrating especially as prices seem to range between $100-900
for similar sizes, so makes it very hard to select correct one.
Andrew
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Regards
Andrew Martin
Martin Ag
Regards
Andrew Martin
Martin Ag
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