Join Date: Dec 2000
Location: Monroe, WA, USA
first off...the temp around the butterfly's is below freezing when runing...physics rember that from highschool never thought you would need that hu??LOL, iceing is normaly a sign of watter in the fuel or a cold manifold/carb, you need to have a warm manifold and carb to get good fuel atomization and in the winter if you have blocked off or non exsisting heatriser pasage you can get this problem. try a diferant brand of fuel, and or put a OEM aircleaner off a pick up with the hot air system, you know the little stove pipe from the header or exaust manifold to the snorkle with a divritore in the snorcale that work's off of a vacum valve.you only need a set up like this in the winter..take it off in the spring when the temp's are above 40 deg. this is only for driveability...you will take a slight performace drop not much maybe oh, 10 horses and 15 foot pounds of torque. but the carb will not ice up and it will drive better in the cold weather.
we tend to set our performance cars up for warm summer driveing..and forget that in the winter they have a few problem's not faced in the summer. hope this help's and good luck!