Still totally perplexed how reliability can be so bad. Won't they have strapped the engine into something and had it running around a track in almost like for like conditions? Seems bizarre.
You're still not allowed to run the engine on track after it's taking part. Mclaren ran it in some bodged together car in like November 2014, but once you get into being an official competitor then the rules mandate where and when you can test.
However keep in mind Merc, Ferrari and even Renault(to a lesser degree) managed to make reliable parts in the lab. We're way beyond the point where track testing is genuinely required. For the most part 95% of design is done and simulated on a computer, wind tunnels mostly just confirm results and check the computer isn't wrong and for the better teams with better design departments, the majority of what they bring to track is near final and works great. Track testing isn't what is holding them back, quite the opposite, their in lab testing appears to be at fault. Other teams test something in the lab and bring something great to the track, Mclaren/Honda are bringing poorly tested things to the track, find out they don't work but because of the way the rules work the engine they have is all that is ready so they have to live with it for a couple months till new replacements are ready and being that they are tested in the same way, and probably even more rushed, half of them are terrible anyway.
Honda just weren't ready for it, they certainly weren't ready for 2015.
Mclaren I just don't get, they wanted to get back on top, all they had to do was plan for the future, if Honda came in for 2017 they'd have more time to develop an epic engine than anyone else all the while watching what the other teams were doing. Why did it have to be 2015, such insane arrogance from Dennis as usual. I can work because it's what I want, screw sense I want a new engine now.