TIme for a Moderator here.
1: Why should your thread replace the thread in the announcement box? The one up there is a general one - for everyone here. Just post your recreations there. It does not matter how old his or how you one yours is. Its a sticky post. Anyone can post there.
2: With every updates there are some changes - its totally normal that engines get incompatible. But for the love of god - just update your old posts with a simple word "OUTDATED" instead of opening a new thread for every single build. The next builds will not change huge things for the engines anymore - just small things.
1: Well both me and the other user of this account thought it was only fair that mine should replace gt1cooper's if mine surpasses his in both posts and views, if you disagree then that's fine! I was only asking a question and it appears you've answered it. Honestly, I never expected my thread to get so many views or for other people to post their recreations on it, but they did anyway and thought I'd ask the question since my thread was much more active and reeling in the other so quickly.
2: I guess that would be the best course of action, nuff said.
I'm going to agree with Pleb that changing the thread makes little sense. It's not a popularity contest, everything Engine sharing wise is under this forum anyway. gt1cooper's thread was put there because it was first, and the idea was to make it easier to get to. 29 of the posts in your thread are from you, the other is a general thread. That's all.
Also, Pleb's "excuse" is not a pathetic one, if anything it would make more sense to merge the threads. gt1cooper did point out early on in your thread that this one already existed, so really stuff could have been kept in the one thread and then this wouldn't be happening. He also meant that as gt1cooper was the owner of the current thread if you like, that it would be worth speaking to him before anyone decides to unpin it from the top. That way, everyone ends happy.
As an aside, engine incompatibility is fairly rare, but shouldn't be unexpected. It's usually to avoid the exact problem you mention of people suddenly seeing all their engines doing different things after a balance update, a warning you also see in-game when trying to use an old engine anyway.
Hope this helps.
My thread is also a general thread, I intended it to just be mine but I never said other people couldn't upload to mine and sure enough other people did. It may not be a popularity contest but as you just said his was put there to make it easier to get to, well, mine is currently the more active and popular one so why shouldn't it be put up there to make it easier to get to? Got an answer for that?
While I certainly still believe Pleb's excuse was a pathetic one I must admit merging the two threads would make a lot of sense, even though perhaps selfishly I'm personally proud of my thread and would prefer it keep it's individuality. And while Pleb probably meant what you said it's certainly not what he actually said.
I see a serious flaw in that last part, do you seriously believe your own words? The admittedly fairly rare updates that change engine performance or make previous ones incompatible are to make the engines more realistic and as you said, more balanced. The developers have already said they plan on adding a "performance index" stat for engines to stop people exploiting the game by having engines which make peek power at the redline by penalising them for it and they also said the efficiency ratings are currently too optimistic, and you think updates to the engine designer are just to reduce compatibility issues? You'd be foolish to think that.