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Post by warpspeed on Sept 27, 2020 23:31:46 GMT
I have a 1.8 BP GTX turbo engine (from a front wheel drive vehicle) plus a BP4W cylinder head that I am very slowly building up as the basis of a supercharged NB engine with a front entry TVS1320 blower.
Its all a rather long story, but I have here a sump and oil pickup from a 95 MX5 to go onto this, and that involves moving the dipstick from the front of the pan, to the rear.
The MX5 pan is much shallower than the GTX pan, and looks too small to hold the 3.8 litres of oil that I believe its supposed to hold. So to get the dip stick located at the right depth, I filled just the bare MX5 oil pan with 3.8 litres of water to measure the water height.
The water came up to exactly 3.5 inches below the oil pan rails, right about where the dipstick tube finally breaks into the sump, and right up and touching either a windage tray, or main bearing support plate. In fact it completely floods the whole front shallow end of the sump.
That seems to be a LOT of oil, or am I doing this all wrong ?
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Post by Zed. on Sept 28, 2020 9:56:37 GMT
That seems to be a LOT of oil, or am I doing this allwrong ?
there was a thread a while ago about oil level in the sump... mighty5s.com/thread/3540/fluid-capacity-b6ze-crank-case remember that when the engine is running there will be a lot less oil in the sump (although not as much diference as a chain-driven cam type engine) Mazda will not have designed the sump in such a way as to cause issues if you're realy worried then modify the sump with 'wings' to add volume but lower the oil level or go drysump... Rich.
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Post by warpspeed on Sept 28, 2020 22:12:10 GMT
Thank you Rich !!
That original post confirms what I am seeing here now. It seems that the correct oil level will indeed completely flood the front part of the sump, and be at about the same level as the windage tray (or MBSP).
You are quite right about the filter and oil galleries taking up some oil, but as the oil surface in the sump covers the entire sump area, its hardly going to fall any significant distance.
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