Quote:
Originally Posted by alice
I understand where you are coming from. I think a good target would have been .020 on the first ring and the second ring ever so slightly more. Yes, I would expect blow by with .030 but in my mind, if, in fact, they really are .030 on the money, I still would not expect blow by to the extent you are experiencing based on your postings concerning the issue. I can only hope that there is nothing else wrong internally. Keep us posted as to future runs and results. Good Luck, my friend!
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I don't think my blow by issue is as bad as you're thinking it is. I did have that clean side separator blow off the oil cap on the big end of a 1/4mile run but it isn't held in by anything more than some o-rings and they came with grease all over them too so it really doesn't take a ton of pressure to push it out. The main thing is the inside diameter of the barb coming out of it. It takes a 1/2" hose but the inside of it is way small. Smaller than the inside of a 3/8" hose. So that was the ONLY way out of the engine for crankcase pressure. Just not cutting it for almost 20# of boost. I remember Gretchen had to move up to bigger hoses on his build because 3/8 just couldn't move enough air.
Plus I think these 3.6 engines make crankcase pressure even in stock form. That's what happened to my original engine, pressure pushed oil out the clean side and into the inlet of my turbo until my intercooler filled and let the engine gulp it in and hydrolock. Plus I work on cars and suv's with the 3.6L everyday here at the shop that are stock and they have pools of oil pouring out of their intake tubes and throttle bodies(coming from the valve cover through the clean side).
Here's a pic of the orings and the barb (me holding a 3/8" hose next to it).