Join Date: Jun 2005
Location: Conyers/McDonough, GA
It is for emissions, fuel vapor condensing on cold surfaces becomes liquid. So you need a richer mixture for cold engine to run properly.
Many drag racers have a cool can to reduce fuel temp.
I have not investigated fuel/air density to see what the benefit is.
I had a Nissan truck that I disabled the vacuum valve to reduce air temp(block warm air from exhaust manifold). The carb did begin to ice up, vehicle slowed down.
I restored the vac hose and back to highway speed.. Snowing in South Carolina 1991-92
If I had a free breathing intake with exposed filter I probably would not have done this. I have the stock air box so I do not expect any icing conditions. Warm air from engine side intake holes.
2005 1300c Red, Mustang seat, HK 2.5 straights. Leds for safety-front & back. 193,834 VTX miles
Last edited by Hans&Feet; 03-06-2019 at 10:33 PM.