Reposting this here in response to the prior criticism of my good faith commentary on Sreten's poor engine building practices on his S65 last year which was what this post was in reference too. Per Sreten's video visit with Partee racing, it looks like I was proven right 2x.
1)Peter Partee schooled you in exactly what I said to about you/to you about how that S65 you built with H2 was sub optimal by any professional engine builder's standards. I know you were asking Peter why torque plates were necessary and he agreed with what I told you. Just let Roger and his team build your engine.
2) When are you going to post or talk about the fact that your 3rd (or 4th "engine rebuild" failed). Don't you owe it to your fan base to come clean about how and why your "better than OEM" S65 engine built by you failed.
I really don't have much else to stay other than when folks with some significant experience chime in to help educate you and others, it might be worthwhile to listen.
Congratulations on your continued financial success on YouTube.
S85 builder wrote This is an interesting way for you to respond. This is called brigading, inviting others to a separate website and forum to respond. I'm responding here for of others who may actually want to learn or understand, which is why I type this in an S65 area vs an X1/X2 forum. I'm not going to take your bait, I'm sure you have a rabid fan base over there, in fact I'm sure you have more fans here that I ever will. This is why very few professionals bother to comment.
I very rarely comment on forums and videos because these things turn in to debates where someone who expresses a unique or informed opinion quickly gets squashed, which is clearly what has already happened on your other thread.
I was asked specifically to comment on things that I THOUGHT were done incorrectly or sub optimally. You clearly don't care what I have to say, because you immediately dismiss professional practices and critique out of hand, that's fine.
I stand by my commentary, and I've also talked to some other engine builders (mainly Chevy guys) and they agreed. You did not blueprint the engine, but if you think you actually did, then feel free to post up your build sheet of all your measurements. You said "I measured the crankshaft, all perfect and within spec." OK bro.
Here's a fact. BMW doesn't even publish in TIS the nominal and tolerance values of most of the typical blueprinted dimensions (it's agnostic to any engine). I'm sure that Bert from BE would certainly agree. No educated builder would ever say "all was perfect and within spec" while knowing that there aren't published specs!
As for measuring bearings, this requires special micrometers, and where you measure matters, because they have a specific profile for bearing crush and elongation. You'd have to have measured both in the fully torqued in the bedplate. This is even a worse PITA than you think. Then you still don't have a concentricity measurement, with or without the bearings installed.
You said "If I were mixing and matching a different crank/bedplate/block, then for sure, proper measurements with tools are highly recommendable, but this wasn't my case." This is one of my fundamental points of engine rebuilding, you ALWAYS measure when the engine is apart ESPECIALLY on the S65 where there are well established flaws with cause bearing failure everywhere on the lower end of the engine.
As far as rebuilding of the head, did you take measurements there? what about valve tip protrusion, valve guide clearance, spring height, force. Pro engine builders all measure this EVEN WITH NEW STUFF. Did you vacuum test your cylinder head? How much vacuum were you holding? Again, there's real substance to me saying that YOUR build was suboptimal. This is easily a 1hr video by itself, but I think it would be boring AF. I use a Sunnen head disassembly bench, it's a universal machine for compressing springs, but it is production level machine, and it is still a PITA. I could elaborate on the importance of balance of the complete rotating assy, but doesn't seem like you'd not appreciate one bit of what I'd say. You new cams will be glorious, just rev rev away.
There's really no dispute in the professional rebuilding arena about using Torque plates and why, street engine or race engine. It's about all thickness and distortion. The difference is actually measurable with a bore gage.
I will watch your Alpina video but based on your explanation, YOU (the builder) specified the desired bore diameter, that actually is YOUR job as the builder. As long as they it the number within the tolerance YOU specified, they did what they were supposed to. Seems like you admit that you didn't know that hypereutectic pistons have a different coefficient of thermal expansion than forged. Tough lesson, cool that you documented, no shame there, but if you were properly educated, you'd have known, that's engines 101. That's why education matters. You also have to specify different rings when you go with sleeves. If the machine shop hit the spec you gave, then you should not expect any renumeration from them. If you then chose to defame them by insisting, they made the error then really they should be suing YOU for reputational damages.
There are many professionals who do these things for a living, you seem to infer that you KNOW they don't measure things and don't follow proper torque procedures. That's a big claim sir. That infers the whole industry does things wrong, and you know better and do it better.
You seem to know that 1% of the comments you receive are hateful or offensive. I just guessed and it seems like I'm right, it seems like you and YT want to have a bunch of happy happy joy joy positivity, while censoring any critique. Well that's kinda cool and really creepy too. I understand why they do what they do and frankly I don't think content moderation is done well as we've seen with Twitter and Facebook censorship. Congrats on doing what you like. This commentary isn't about where you came from, it's about specific things that weren't done right.
Someone else will have to explain my comment about your lack of pre-pressuring lube practices. It may very likely have contributed to premature wear on your other engines. If I say it, it will only seem like I'm preaching to you from my high horse, but it's done for a reason, and what you did isn't it.
EDIT: Oh and if anyone thinks I am Troy or I know the guy, you are seriously misinformed...
