Depends what carb!
I had an eddy with a cam like that. Wouldn't start without a lot of fussing. Pumping gas and choking it.
Put a holley 750 vac secondary on and it would start after a couple pumps with no choke no matter how cold it was outside. Even down to 20 below.
In my experience Edelbrocks are much easier to tune for cold starts, and do a much better job than holleys, BUT I have a bias towards those on any basic street engine anyway.
My 2.3L Bobcat has a edelbrock 600 (1406) with a single plane intake, header, and locked timing, that I've retuned and you just give it one little squirt with the accelerator pump and turn the key. The idle starts at about 800 and when its warm will climb to about 1000. Absolutely no start issues at all.
It is a little fussy on off idle tip in when its cold, but after a few minutes of driving it performs flawlessly.
My experience with big cams is easier starting, and less flooding, partly due to higher lift and longer duration on the exhaust side, JMO. In my blower motor flooding isn't a problem, I've only flooded it once. In the tunnel ram BBC bucket, same thing, easy to clear it out but it starts with a roar. I never crank the blower motor with the throttle open, and try not to in the bucket, but that is how you clear it.
i'll try advancing the timing a bit, my previous engine with a few sizes smaller cam started up fairly easily in the cold with a choke and my foot slight on the accelerator
I probably just have to finish tuning the engine, if it's still kinda hard i'll step up to a 750
Bigger cams use heavy springs, high compression, and require more initial timing. Heavy springs increase seat pressure adding rotating resistance at start up. Turn a stock engine by hand and then a big cam engine. The high base timing required will also be a load at crank and increases for hot starts. The warm up time will depend on many factors. The choke when tuned can work well. Starter timing retards can increase the life of your starter and make things easier. A high torque starter will crank the higher compression builds nicely.
The timing is probably the critical variable for asuring easy cold starts. A proper vacuum advance is needed for a driven vehicle.
Yes a big cam will cause harder engine cold starts. There is more load. Is that what you are really asking, I do not know.
Well that was my big question, yes. For the most part I wanted some tuning tips on how to better start it cold, someone said advance the timing a bit, I did, it worked wonders.
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