hand throttle vs cold start circuit, Anyone use the CSC on Webers? Options

[bbrock]

My Webers have the cold start circuits installed. While I'm replacing the floor pan and have easy access to the tunnel, I am thinking about adding a couple tubes to run cables from a hand throttle lever to the carbs to operate the chokes. Wondering if anyone has done this and whether it would provide superior cold starting to the traditional hand throttle. I live in the frigid north where it can freeze any day of the year, so I want the best cold start operation I can get. Thoughts?

[bbrock]

This is all great feedback. Still would love to hear about starting a carbed engine at zero degrees F, but this has been great. I'm liking the idea of just waiting until the car is back together and testing the cold start circuit. I was thinking that the time to prep for cables to the carbs would be when I had the floor off and tunnel opened up. But in reality, it's just a couple holes with grommets that would be needed to pass the cables through the firewall.

As for forgetting to put the lever down after the engine warms, I wouldn't think it would be much different from a manual choke. It happens, but becomes obvious pretty quickly. In this case, I would assume the engine would idle fast due to the rich mixture.

One other thing. In addition to starting ease, I've read elsewhere of some people warning about fuel washing the oil off the cylinders when you pump the accelerator just prior to starting. That might just be crazy "Internet lore" but wonder what you think. It is true that the cold start circuit would be spraying atomized mix into the intake and only when there is vacuum to pull it in during a combustion cycle.

[jd74914]

As for forgetting to put the lever down after the engine warms, I wouldn't think it would be much different from a manual choke. It happens, but becomes obvious pretty quickly. In this case, I would assume the engine would idle fast due to the rich mixture.

Yeah, you'd hit a high idle. As a note, my dad drives his carbed 911 when it's well below freezing and I don't think has ever forgotten that lever so once you get acclaimed it's really a non-issue IMHO.

One other thing. In addition to starting ease, I've read elsewhere of some people warning about fuel washing the oil off the cylinders when you pump the accelerator just prior to starting. That might just be crazy "Internet lore" but wonder what you think. It is true that the cold start circuit would be spraying atomized mix into the intake and only when there is vacuum to pull it in during a combustion cycle.

Ehh, really no different than a cold start value or the increased fuel pulse on a FI car. You know, in a really cold start on a modern car they actually can inject 100-1000 times more fuel per pulse then needed at idle and don't have washing issues. At those temperatures your fuel is condensing on the intake manifold and almost dripping into the cylinders at low engine speeds to I really don't see much different. You'll get pooling no matter what.

[bbrock]

Ehh, really no different than a cold start value or the increased fuel pulse on a FI car. You know, in a really cold start on a modern car they actually can inject 100-1000 times more fuel per pulse then needed at idle and don't have washing issues. At those temperatures your fuel is condensing on the intake manifold and almost dripping into the cylinders at low engine speeds to I really don't see much different. You'll get pooling no matter what.

Wait... what? Are you saying that people on the Internet make (IMG:style_emoticons/default/stromberg.gif) up? This changes everything! (IMG:style_emoticons/default/blink.gif)