for all you guys looking to try this at home, if you look at waynes pic, his angle is approximately 70*, give or take. you dont want to go much lower than that, as it will physically pull the oil out of the motor.
been there, done that. my dads demo motor didnt last long after it sucked the oil out.
on our motor, we use a 383 stroker full roller for our derby cars, we have found that approx 55* is the max before it starts pulling oil out. it doesnt come out fast enough to see it, but when you look at the top of the car after the heat, we found the top was covered is oily residue, and it was a 1.5 quarts low. this was in a 13 min heat.
we have since went to where wayne is now. at about 70*. in our motor, it creates a vacuum that barely reads on the guage, will completely eliminate pressure inside the motor, and we no longer lose oil.
if you have a chimney in your house, open the flu, and stick your hand in there. thats what your after. you dont want to pull air out fast, you want the slight vacuum to make the air go where you want it to. for reference, the air blows 90* to a chimney.
just some of what we have learned.
