Originally Posted By: Jeffs2006EvoIX
Originally Posted By: Clevy
Originally Posted By: Jeffs2006EvoIX
The Reason why I am asking the OP questions about his modifications is that he is giving me some cues from his original post that makes me think something is up.
Though I am not a K20A3 guru, I do have experience turbo charging N/A motors. Primarily B Series Honda Motors.
The K Series is pretty stout, but the OP is claiming 350whp. To achieve this type of power, in this particular engine it would require some serious mods, knowing the mods will help us, help him.
OP also claims he has been running this HP figure for many thousands of miles. Also a red flag. Most K20 builds I know running an OEM block run low boost of around 6-8lbs and this would give reliability but would give no where near 350whp that the OP is claiming. So he must have a built bottom end and possibly a built top end, running a decent sized turbo as well.
OP states that his oil turns Black after short intervals. Though this is not much to be of concern, it can be another red flag. If the oil is turning black that fast, ESPECIALLY using T6 of whcih is a High Detergant oil is telling me (a) that the engine is running WAY too rich, or (b) a possible head gasket issue.
Though Chevy feels that you cannot tell "Wear" on an engine through a UOA, I think he is incorrect. Yes a UOA will not tell you exactly, BUT it will raise red flags. If Copper levels are high, Iron is high, Nickel is high, if Flash point is VERY low if HTHS is low, There are MANY factors in a UOA that can show something is wearing incorrectly or that something in the engine is not working properly. That is what I was trying to say, but Chevy seems to dissagree with. So I will leave it at that.
UOA's for the OP is a start. Yes you need several to find a pattern, that is a no brainier, but if the OP does a UOA now and his Copper levels are like 50, you know something is wrong, if the Flash Point is 275F or something we know there is some serious fuel dilution going on there. If there is Water in the oil??? Head Gasket issues. I can go on and on.
So OP, First, Give us your supporting mods, post up a Dyno sheet so I can see your AFR's and your Boost Levels at what RPM's, and use the T6 for a couple more oil changes to check for any variances. Report back to us with a UOA, and some info.
Hope this all makes sense to the OP.
Jeff
I have merely applied what I've learned here at bitog. If you've got a problem with it I suggest reading Doug Hillary's posts since he's an expert,and over the past 40 years in the industry has the experience to know what a 40 dollar used oil analysis is capable of.
Just because your an enthusiast doesn't mean you know anything about how to read a used oil analysis.
I suggest you read posts from actual experts,then decide.
When I first became a member here I too thought wear could be measured in a used oil analysis,however a 40 dollar used oil analysis doesn't see particulate size,only concentration,and therefore is NOT an accurate measure of wear.
Please if you can read Doug Hillary's posts,paying special attention to his million mile Diesel engines to which the used oil analysis saw upwards of 200ppm iron ore oil change interval yet at tear down the engine was mic'd and compared to the new measurements and no appreciable wear was measured,and the engine was reassembled using the same parts.
Educate yourself instead of posting what you think,because in this instance you're wrong.
This is another time we keep butting heads. Not sure why that is?
Have I ever said I was an expert? I'm just trying to help.
What I do have is over 20 yrs experience modifying asian cars and have countless hours of track experience.
I never claimed to be an expert at anything. Yet you keep giving the impression I am? Or??
So I will leave this post alone. I call [censored] on the dyno numbers on these K20 motors. The ones I know are heavily modified to make these numbers reliably. So without a mod list ecu software info or data logs WITH uoa's I can't help.
If you provide this info feel free to pm me.
Otherwise I'm out.
Jeff
This should ruffle your feathers even more. Apparently K24 motors can take 700whp stock internals.