Again, carb icing (in steady state AIR COOLED AIRCRAFT engines is a well known and documented fact, HOWEVER, I know of NO one that has EVER had any issues in a vehicle speeding up and slowing down, idling at lights (and heat soak from that, regardless of temps. There is ALWAYS a HOT 200 degree BLAST of fan forced air heating it up some anyways. I KNOW my truck runs NUCH more efficiently, and since I started doing this in 1980's, HAVE HAD NO ISSUES ever, no matter if -5 F (one year in mountains of NCarolina ski trip)!! Just waay more power and tq! Also this is posted all over Nissan 350Z and Frontier sites/forums (by me and others) and again, thousands are doing this, with NO complaints or issues EVER from ANYONE , but many raves and thank you's attaboys from satisfied users, especially thise increasing timing 2 or 3 degrees...