I've never owned an IDI that didn't start instantly in cold weather.
I can appreciate your admiration of the Cummins, but I have to admit I think this is the most B.S. excuse I've read yet.
No offence... pick a better excuse. There are some.
Wait, what? Show me vids of your truck starting at -15*F with just hitting the key and not being plugged in or ether assisted starts. None of mine have been able to do it, and my first 85 was a fresh, 6k mile Jasper reman engine, with the timing set to 8* BTDC by the local diesel shop. It would start mind you, but not without at least two cycle of the glowplugs.
I know that most IDI's are left by the way side when it comes to maintaining the injection and glowplug systems, but come on. Best case scenario, my uncles immaculate 92 7.3 with the utmost care and maintnance done to it, would still need the plug at those temps, or at least a few cycles of glowplugs.
My old bosses 92 will fire any time of day or night, no matter what the temp, right when you hit the key. You don't know how many times I had to dig that thing out of a snowbank to haul our enclosed trailer when the 99 24v he had wouldn't start. I have several buddies that have 90-93 era trucks that will start up istantly also.
I will say one thing, all 3 of my IDI's could start faster than either of my p-pumped trucks would. Of the 95 and 97 that I owned, the 95 would fire up quicker, but even the current 85 will pop off quicker. They would make the power tho.
My admiration comes from owning 3 IDI's and the experiences I've had with them, my p-pumped woes, and the awe of using a VE pumped truck for work for 2 years straight. Plus the fact that they can make very easy and cheap power.
I still love my 6.9, and will always have a spot for the IDI's.