only way i know to get sub ambient temps is ice in an a/w setup . now if someone in there right mine would set something like that up for a few minutes of cold air is beyond me but this is all bench racing any who.
i also didnt think co2 was combustable , its a by product of combustion.

 

I guarantee that an intercooler sized for 1000RWHP will NOT show ANY negative affect on a 3 cyl geo metro motor....

to restate: provided the pipe/intercooler can flow the required air and show a zero pressure drop, it WILL NOT have ANY affect on HP either way

 

I remember in a magazine article about Bonneville speed week a long time ago, there was a naturally-aspirated car with a CO2-to-air intercooler. It was built like a water-to-air cooler, with liquid CO2 instead of water. They said there were big power gains with such low intake air temperatures.

I think on a street car, if you used a refrigerated system for practicality, it likely would not lower the temperature enough for noticeable gains.

 

There is no such thing as 0 pressure drop. Unless pipe has a perfect polish, there is always a surface roughness and resulting friction factor--even straight pipe. This applies to intercoolers as well. Anytime the flow is disrupted or changes direction (such as in an intercooler) you will have a pressure drop as well.

The pressure drop can be very small though, such as the case you illustrated.

 

yes, but my point was simply pointing to the negligible pressure drop in such a condition....

the resulting pressure drop can be so small that it can be calculated as zero

 

I ran my A/A intercooler for a day right before I put the turbo on. DO NOT do it, way too much restriction. It was WEAK!

 

well... thanks for the first-hand advice

turbo 8.1... sounds fun!! front-mount?