The V1.2 core requires quite generous priming (at least on my computer). In V1.0 I used to start the engine with max 12 strokes for anything below +5 deg Celsius. With 1.1, I didn't need any priming at all. Now, I need 12 strokes for +5 and around 20 for -10 deg C. Yet, some claim they start engines with just 12 strokes at -29 deg C. I wonder how they do it...
I definitely cannot get MkI to start with 12 strokes in -10 deg C. It typically coughs just once or twice (if even that much) and stalls immediately thereafter, even if I keep priming it extra strokes in addition to those 12 I gave it prior to starting the cranking. If I give it 16 strokes, I occasionally manage to get it alive. 18 strokes, it's already pretty likely.
MkII is in a way a bit easier on the primer since the Coffman starter gives higher rpm for that short duration of time it keeps spinning so around 16 strokes is already a pretty sure catch, especially if I give the final stroke or two during the cranking to guarantee a finer mist of fresh fuel to the manifold (though I don't know if the "freshness" of the primer is modeled or not, I still tend to do it because that's what I'd do if I operated a real engine).
And for the record: I have both main mags on, and starter mag on MkI, I have rich mixture, both fuel cocks open not only during starting but also during priming, and I have my throttle opened a bit more than just cracked open, around 1/3.
But, I'm not really annoyed by it. It might actually be more real if it requires more than 12 strokes in subzero conditions. It would actually make no sense at all if it required 12 strokes at +5 and the requirement wouldn't increase as you go subzero. I'm just wondering why some people (Cody for example) manage to get it running at -29 deg C without increasing priming even a little bit from what would be required for a cool-but-not-truely-cold environment. But that's not my problem. If it's a problem, it's their's. :p
I'm more annoyed by the pneumatic bug not being fixed even in 1.2 update. It's become even more frustrating with the improved start-up behaviour with v1.2. If you start with pneumatic tank unpressurized, start the engine underprimed, or for any other reason manage to stall the engine immediately thereafter first coughs... enter the pneumatic bug: the pneumatic engine driven pump will CONTINUE to pump air into pneumatic tank even after engine as come to a stop. And it will continue hissing until the tank is fully pressurized.
Please try to start it at 30 deg F, its closer to 0 C, also isn't it strange, that when you are giving it 12 strokes, and then prime it more, it won't start, but if you give 16 immediately ,it can catch, where is the fuel going, also i too didn't have a problem with starting at -29 deg C. khy khy
with normal oil
Also, what annoys me is the starter switch jumping away when close to catching