Here's the scenario - Have the racecar out at Buttonwillow, putting around 6/10th's because of brake and camber issues, get T-boned by car in another class when he lost control. Dent to driver door, but no major issues. Here's where the problem comes in.
Two laps later, I think I heard a loud whistling (had earplugs in this race), car drops to 3500rpm and holds. Coasts to a stop and shuts off. No pop, no bang, no blown motor parts, ZERO OIL BURN OUT EXHAUST. It was the smoothest "failure" I've ever felt in an engine. Just felt like I ran out of gas (no, it's not out of gas). Won't start, when it does it runs like it has zero compression and there's a giant hole in the block. Get it home, not sure if the tensioner failed, but intake and exhaust cams are off 3 teeth.
Known facts:
-Engine, if I get it to start, won't idle, spins up like it has zero compression
-Intake & exhaust cams were both off 3 teeth
-Full timing set ordered and done: new crank gear, int & exh timing gears, chain, bolts, tensioners, etc.
-Also did balance shaft/water pump chain and tensioner
-Crankcase is getting pressurized, blowing oil out pcv
-OIL LEVEL FULL
-WATER LEVEL FULL
-Engine only burns oil from pcv
-Turbo spins freely
-Plugs show no oil
-No broken valve springs
-No broken rockers
Rings? Sure, even though it burns zero oil. Bent valves? Understandable. Compression check done 3 times. Last compression check was today at lunch. 190psi all 4 cylinders.
So, what causes the engine to run like it has zero compression, not even want to idle before shutting off, not throw any codes, only burn oil through pcv and crankcase being pressurized (vapors out oil cap).
Last check will be high pump fuel pressure (tank pressure 60psi) before I guess pull the head. I don't like doing that without any indication of what's going on. Leakdown showed no issues. Friend's dad came over today (Ford mechanic for 20yr) and was stumped. I was hoping he would say "It's right here, stupid. You have a broken booziewhatsit." Could it be something as simple as blown valve stem seals? Visual inspection showed nothing obvious.
edit: I have looked up several videos of cam and crank sensor failures. The engines still idle normally. They throw codes and rev up all funky, so that has been ruled out. The engine will rev up 'normally' (real quiet like it's zero compression) when you get it above idle.
More info - the engine is of unknown origin. I have no idea what was done to it or how it was driven. Went through 99% of the racecar, but that obviously isn't 100%. The engine has never felt as powerful as my other. So, this issue may have been around since I got it.
Coolant temp was 212° when the incident occurred. Runs like I left the spark plugs out. Real quiet and more like a giant air line than compression occuring.