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Garen Garen is offline
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Join Date: Aug 2006
Location: SE Michigan
Posts: 328
Garage
How about this:

When you set your fuel mixture, you base it on what comes out of the IC, and into the engine. X amount of air, sucked in through the barn door, pressurized, cooled to 90 degrees, and ready to be consumed by the engine has a density of Y. So, you tune the mixture to get your desired AF ratio based on air of that pressure, temp, & density.

Now you're at the track, and your actual intake temp is at 140. The density has changed. Has the CIS been fine-tuned for 140 degree intake temperatures? That is Craig's question as I understand it.

I don't think it's about air dissapearing between the barn door and the throttle body, it's about what parameters you set your mixture to. Correct me if I'm wrong, but you don't set the mixture to the air just before the turbo, do you?

So, Craig, would you feel comfortable leaning out the car based on the density difference? Kinduva risky game to play...
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Garen (87 930 track rat)
Old 08-17-2007, 06:24 AM
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