Carb icing?

Author
Discussion

haynes

Original Poster:

370 posts

249 months

Wednesday 2nd March 2005
quotequote all
Ive got twin SUs with K&N pancake filters, the inlet is not heated. Its running and pickup has been a bit vaiable lately, is it possible the carbs are icing up? What are the classic symptoms?

Extra 300 Driver

5,281 posts

253 months

Wednesday 2nd March 2005
quotequote all
The pressure drop in the Carb causes Carb ice. This causes the moisture in the air to freeze and drastically. I drive my Mini, most days, to work which is a 100 mile round trip. I am running twin HS6’s with trumpets and since November I have been suffering from ice.

The normal procedure is;

Nice long run on a duel carriageway at about half throttle, approach a junction and the engine runs really rough and I have to keep my food on the loud pedal to keep the engine from stalling. Usually when I arrive at my place of work I have to wait in a queue for Security checks, it’s the same story there, rough running and foot on the gas. After a while, maybe 2 mins the ice clears and the engine runs sweet again, that’s as the heat rises up from the exhaust and heats up the intakes.

I have taken a look under the bonnet when the problem was really bad and seen the carbs white with ice!!!!!

This is normally a problem associated with light Aircraft.

www.copanational.org/non-members/safety/2003/safetyCCDec03.htm