Ballpark Engine Lubricant Oil Flow Rate
Ballpark Engine Lubricant Oil Flow Rate
(OP)
Can anyone give me a guesstimate of my lubricating oil flow rate to help me size an oil cooler and calculate plumbing system losses?
Engine is a VW A1 (Rabbit, Scirocco) 1600cc 4 cylinder, 5 main brg, solid lifters, bearing clearances slightly bigger than std (~.002"), running SAE 30 or 50 oil. Runs 60+ psi at revs of 3500-7000 RPM, oil temp (after cooler addition!) say 250 Deg F.
Nothing really unusual about engine having said all that, so the flow rate for any roughly similar engine will get me pointed in the right direction.
Thanks in advance!
Al Seim
Engine is a VW A1 (Rabbit, Scirocco) 1600cc 4 cylinder, 5 main brg, solid lifters, bearing clearances slightly bigger than std (~.002"), running SAE 30 or 50 oil. Runs 60+ psi at revs of 3500-7000 RPM, oil temp (after cooler addition!) say 250 Deg F.
Nothing really unusual about engine having said all that, so the flow rate for any roughly similar engine will get me pointed in the right direction.
Thanks in advance!
Al Seim





RE: Ballpark Engine Lubricant Oil Flow Rate
Thanks!
(I'm still interested if anybody has any flow numbers for any remotely similar engines)
Al Seim
RE: Ballpark Engine Lubricant Oil Flow Rate
2gph ?
Rod
RE: Ballpark Engine Lubricant Oil Flow Rate
Got me!
Al
RE: Ballpark Engine Lubricant Oil Flow Rate
You could calculate the swept volume by carefully measuring the oil pump components, but it's probably possible to just measure.
Place the oil pickup into a container. Add a measured quantity of oil. Rotate the pump a known number of times. Measure the oil remaining in the container.
This is easiest if the oil pump is a seperate piece that can be operated apart from the motor. If not, you'll have to get creative.
Carter
RE: Ballpark Engine Lubricant Oil Flow Rate
You can do this foe a number of gears until you get enough to give an accurate reading with the equipment you have
From there you can do the sums on how many times a tooth passes the discharge port in a given time at a given engine rpm.
Regards
pat pprimmer@acay.com.au
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.