Post by The Lazy Destroyer on Jan 23, 2023 21:11:55 GMT -5
Changed to 10w30. Ran it for a couple minutes and the oil looked way better. No bubbles or frothy oil. Seemed like it smoked a little less also.
The oil pump I have (fuel pump style) runs at 50 psi all day until the engine runs then slowly creeps down to 20 psi. So I kept it at a short run and at lower P2’s (<7psi). Will probably look to change this pump out to something else.
But for now pretty happy, this thing starts right up and runs pretty smoothly. I’ll keep working on it but I feel this is a good place to be at. Need to shift to some other projects but at least I can say she runs now!
Post by britishrocket on Dec 6, 2023 12:29:31 GMT -5
Hello, This is such a superb build and I'm finding it inspiring. I have a few questions though.
The 10psi boost (so 24.7 absolute) suggests a compressor pressure ratio of 1.6.
The size of the compressor inducer gives a maximum air flow rate of about 0.65lb/sec or 39lb/min. I have looked at T3/T4 compressor maps for various different trim values and I can't find one that would flow anything like this at a compressor PR of 1.6.
Yep , at a 1.6 PR the flow will be roughly half the full rpm flow , and as you said , a comp with a 50 mm inducer will flow ~35 lbs/min, or the rougher 12 lbs/min/sq inch of inducer, so maybe up to ~20 lbs/min at 1.6 PR