and then we set it on fire?

[AndrewSpencer]

What?
Got this from my "Old Dude" friend:
https://www.youtube.com/shorts/9CNJQzIR-Ts

You can hear the electric starter hit. Is this in place of glow plugs?

Which begs the next question, what is it that we are waiting on for our vehicles to "warm up"?

The Cub prefers a high idle for a good 2 min before you even put in the clutch, same with the porsche. Now the cub has a fairly fresh rebuild (and the porsche has had one scheduled for 170k miles. Any thoughts?

Hope you all have had a great Christmas and new year!

[Dave Downs]

It looks like he’s applying heat to the exhaust manifold which will do nothing to warm the incoming air. Also it’s not being applied long enough to warm much of anything.

I think it may just be a joke……

[Gary Dotson]

The intake manifold is just above the exhaust manifold. Yes, it’s a diesel but as mentioned, that’s now enough heat to do anything worthwhile. Diesels do, however, respond well to warmer intake air when cold starting. Direct injection diesels can not be equipped with glow plugs and must resort to other means for cold start. One popular system is an intake manifold electric heating grid.

[Jeff Silvey]

I agree with Gary.

[Jim Becker]

Is there an opening in the intake manifold, right where he is holding the fire? If so, it might make a difference.

[Grader Lee]

I have a 1945 Allis Chalmer HD-7 with a GM 3-71 it has a diesel burner that blows flame inside the air box to aid starting.

[AndrewSpencer]

Awesome! So we mount a flame thrower to aid in warm up?
But what are we waiting on for “warming up”?

[Glen]

Awesome! So we mount a flame thrower to aid in warm up?

Hi,
You mentioned the Cub above.
I don't think flames should be anywhere near a gas engine, like the Cub has.

But what are we waiting on for “warming up”?

My Cub engine runs better when warm, and doesn't stall as much.
The choke rod needs adjusting so the choke is partially on while the engine is warming up, so the engine doesn't stall.
The engine doesn't have to be running fast while warming up.
Below is a page from the 1949 Cub owner's manual, telling about after starting the engine, at the top left of the page. There is info about starting the engine on the pages before page 10.
https://farmallcub.com/rudi_cub/www.cle ... age-10.jpg

[AndrewSpencer]

In my first post I was comparing my 53 farmall cub and my 86 porsche. Both prefer to sit at idle for a good 2 minutes before anything is done. One is carb one is efi. Why is that? What are we waiting on? Can I better measure the “warmup” thing we are waiting on?

[staninlowerAL]

JMHO, one reason is to allow the engine oil to warm up a bit so it circulates better i.e. better lubrication. We all know thick oil and cold weather makes starting the engine more difficult. Stan

[Gary Dotson]

What you’re waiting for is for the engine to build some heat in the combustion chambers so it can burn the fuel mixture more easily. When the chambers are cold, they require a richer mixture to help the burn. Your Porsche should have a cold enrichment nozzle to help it out. Modern EFI engines cover this issue pretty seamlessly.