My 1915, when cold, will start first or second pull without even choking it.
Once it is warmed up and has set for awhile (say 30 minutes) it is HARD starting.
Bone stock, new Stromberg OF on it (less than 1000 miles). I'll test the compression later today but a fellow T-Nut thinks I have compression issues.
What is different after it has warmed up that makes it hard to start?
I would check my timing first, if it is advanced when cold it would start easier,I had a timer that someone had re-welded a a broken tab that holds the timing rod in the wrong position gave me the same issue.
The Stromberg has an idle enrichment circuit. I used to have one o. My 15. It was hard to start warm until I figured out it was flooding at low throttle settings. Try half throttle.
I'll give half throttle a try. I like the Stromberg but I find it frustratingly hard to start after it is warmed up.
Free starts are not all that uncommon with this thing!
This sounds an awful lot like vapor-lock. _I had the same problem with my Navion. _While making a pit-stop to refuel and hit the head, the engine compartment would heat-soak and the gasoline in the lines would bubble up. _The answer was to park with the engine compartment open and just let the heat out. _Starting the hot engine was then much easier.
Maybe this will work with your Model T, but there's also a likelihood that your fuel line is running parallel and in close proximity to your exhaust pipe, and that could also cause vapor-lock. _In that case, the answer becomes a matter of re-routing the fuel line always from the exhaust pipe. _Just my humble opinion.
Thanks Bob. When I built the fuel line I had vapor lock in mind and it is as far from the exhaust as it can be and still be on the car.
That doesn't mean it ISN'T vapor lock.
If you took pains to route the fuel line away from the exhaust pipe, it's then unlikely to be the culprit. Do you have engine pans or any carburetor heat ducting?
I don't have a Stromberg, but my L4 acted exactly the same way. The only cure was to open the throttle wide and shut the mixture WAY down (even off). It was obviously flooding.
It would then start and die almost immediately, because the mixture was to lean to run. I then opened the mixture to normal (no choking) and it would start every time.
Cheap fix if it works for you.
Finally wound up changing carbs.
No pans but I do have a hot air pipe.