Oil control rings
 

Update on my issue with oil being pushed out the dipstick.

Builder has just said he's found a problem with the oil control rings tension being too weak. Could this be the reason for excessive blowby into the crankcase?

He's ordered a different set of rings this time, hoping that's the fix.

I do not think that is your problem. Does your engine have the proper guide tube inside the pan for the dip stick? I have seen some engines over the years with piston pins that came out. Broken ring lands and they were not pumping oil out the dipstick tube.

I run a 9LB oil ring with a vacuum pump

How do your plugs look?

If excessive oil was getting into the chamber then that would be seen on the plugs, but on top of that oil getting in there will lower the fuels Octane rating possibly by a lot.
If that's the case then the motor could be detonating at a given throttle opening and detonation will unseat the rings making for blowby and abnormal crankcase pressure.

I am not getting the warm and fuzzy's from the capabilities of your builder I must say at this point!

To put things in simple terms

oil controls rings do what? control oil.!

Rings 1 and 2 control pressure

oil is a static creature it just gets knocked / pushed around

pressure is different high seeks out low

high pressure in a crankcase will seek out low atmospheric pressure by exiting the engine any way it can usually by breathers if the breathers cant flow this given volume the dipstick gets ejected along with oil that is frothed / misted by crankshaft

other than pressure i guess the dipstick could be forced out physically by interference with the rotating assy

Plugs were not wet from oil, just blackened from running rich.

Dipstick isn't touching anything rotating.

I was going through some pics and thought of you. Here is a pic of my IA2 block and another P/Y member with the breathers. At minimum you should consider holes in that valley area while the engine block is apart to do the rings. Just saying. I'm willing to bet you'll need to run a vacuum pump.

What's the reasoning behind doing that? Those don't look like E-heads lol

Hi: If your talking about the breathers, I don't know. It's not my engine block. :)

I think your problem is the rich condition or the bores not honed and cleaned properly or possibly improper break in or combination of all.

Where those breather fittings are, I already have the holes. By putting the breathers in there, what are the benefits over just holes?

Like I said in previous post I Don't Know. The dudes with the Brain power on here will know. I just posted pics for your reference. Hoping you make out OK. Oh and your welcome. ;)

Okay thanks Chuck

What's happening with your engine? Any updates? Thanks

Hi Chuck, engine has been re honed and new rings, just waiting for him to get it on the dyno to break them in again.

Thanks. Wishing you great success with it.

Hi Chief, sorry I missed your reply above originally. What is your thinking by this?

Thanks
Rick

I would think that his concern is that if the wrong lower block tube is used that the dip stick will not be the proper depth in the oil.

I have seen the inside guide missing on rebuilt engines. Oil capacity is incorrect. Not sure if the crank can throw enough around to push it up the tube at high rpms.

Chief, funny you say that as I had the same thought yesterday.
Engine is back together and leakdown is better, 10% on all 8. Made more hp and tq than before too.
Oil came out the dipstick still but when we put a long hose over the tube so someone could check for pressure while in the dyno room on a pull, nothing came out and there was no pressure either.
I'm going to cap off the tube and keep an eye out for any leaks elsewhere. Hopefully as there's no pressure it will be ok.
It made 546hp and 597tq @32 deg.