Mixture and Exhaust

[KVH]

I rebuilt my engine. After warming up for five minutes, it runs absolutely perfect. Smooth, quiet, fast (for an LBC).

As some know, I was concerned about black splatter out the exhaust on cold weather startup. However, some responses said that was normal.

Here's my question. With the choke slightly pulled, and the engine warming from cold, and without any evidence of blue smoke like burning oil, what would a very smoggy thick exhaust odor in the garage tend to indicate in the way of problems.

"None" would be a welcome answer, but I don't recall this before and I'm concerned it's either way too rich a mixture or something else. Besides, I don't know what a rich mixture would smell like, and I'm not sure I'd say I'm smelling gas.

Go Cardinals!

thx

 

[poolboy]

I'd imagine that some assembly lube would burn off during the first start-up.
If the carbs are running real rich, you'll smell gas. If just slightly rich, maybe not. But it's real easy to tell about the mixture once the engine warms up by lifting the air valve (piston) with a thin blade about 1/8 inch or the SU's lift pin.
If the engine speeds up, that carb is running rich.

 

[TR3driver]

what would a very smoggy thick exhaust odor in the garage tend to indicate in the way of problems.

You forgot to open the garage door !

 

[prb51]

Don't understand the 'smoggy exhaust smell' exactly. Remember we're used to modern vehicles with cat converters etc. that remove many of the old, normal, burned fuel smells associated with int combustion.
My LBC which is in good stead smells of oil, exhaust, tranny fluid etc. and every LBC I've owned has the same olafactory experience.

 

[hondo402000]

the black splatter is most likely due to running a little rich on start up and when a car is cold you do get water, some water comming out the exhaust pipe util the exhaust system heats up and evaporates the water so you get splatter out the back, I had the same suituation when I put triple webers on my TR6 and they ran rich till I got them jetted in better, but they would splatter the garaged door with black spots