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<blockquote data-quote="rollo" data-source="post: 240800" data-attributes="member: 2253"><p>i remember 1 fellow who did this in his 2nd gen civic. he ran the fuel line between the fuel pump & the carb float bowl along the aircon tube hose which transports the aircon gas from the cooling coil evaporator back to the compressor & wrapped them closely together. the aircon gas in this hose was cold enough to help cool the fuel. he said the effect is that the engine feels more alive. so i guess the cool fuel would have helped cool the air it mixed with as the air-fuel mixture travels from the carb down through the intake manifold & finally into the combustion chambers, and also the cooled fuel would be denser & more energy content per unit volume.</p><p></p><p>with multipoint fuel injection nowadays, the fuel injector nozzle is placed close to the inlet of the combustion chamber & so in effect, the fuel is virtually sprayed straight into the combustion chamber as the inlet valve opens and may not have time to further cool the air already in the combustion chamber before the ignition starts. so with multipoint fuel injection, cooling the fuel may not have much effect at all.</p></blockquote><p></p>
[QUOTE="rollo, post: 240800, member: 2253"] i remember 1 fellow who did this in his 2nd gen civic. he ran the fuel line between the fuel pump & the carb float bowl along the aircon tube hose which transports the aircon gas from the cooling coil evaporator back to the compressor & wrapped them closely together. the aircon gas in this hose was cold enough to help cool the fuel. he said the effect is that the engine feels more alive. so i guess the cool fuel would have helped cool the air it mixed with as the air-fuel mixture travels from the carb down through the intake manifold & finally into the combustion chambers, and also the cooled fuel would be denser & more energy content per unit volume. with multipoint fuel injection nowadays, the fuel injector nozzle is placed close to the inlet of the combustion chamber & so in effect, the fuel is virtually sprayed straight into the combustion chamber as the inlet valve opens and may not have time to further cool the air already in the combustion chamber before the ignition starts. so with multipoint fuel injection, cooling the fuel may not have much effect at all. [/QUOTE]
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