Fuel chillers?

[Mid_Life_Crisis]

Somebody asked me the other night if I had considered putting in a fuel chiller. Apparently there are different types that could be adapted to our cars. One of them is a Fuel Rail Chiller which essentially is a coil that wraps around the fuel rail. I'm not sure how the coil is chilled. This reminded me of Cool Cans, which are something that looks very similar to an oil catch can, except that it has fuel line running in a coil around the inside surface and the can is insulated. While sitting in the staging area at the track, you put ice in the can and it cools the fuel. I wonder what, if any, effect something like this would have if installed right before the CDFP. One of the benefits of the Direct Injection technology is its cooling effect. Would that be enhanced if the fuel was a few degrees colder?

 

[nhluhr]

I think the cooling effect is dramatic with DI because the fuel is so well atomized which leads to more evaporation of the fuel. The phase change from liquid to gas absorbs a lot more heat than simple temperature change in the liquid state so although it could have some effect, it would be minimal at best. Also, most vehicles are equipped with fuel temperature sensors and depending on where that sensor is installed, cooling your fuel post-sensor could cause a corresponding unexpected result from the ECU but it would at least be a safe result.

So in short, it won't hurt anything but it probably is not worth the effort.