Metrics
Weight
Performance
K20 Swap
Disassembly
Cooling
HVAC
Firewall
Fuel System
Electrical
Engine
Mounts
Exhaust
Misc
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Un-intercooled
Average intake air temperature at run end = 147 degrees (range 145-150)
Average knock count 21 (range 16-27)
Boost 8.5 lbs
Without the intercooled each successive run would reduce the power by about 2 hp.
Intercooled
Average intake air temperature at run end = 125 degrees (range 125-125)
Average knock count 5 (range 4-6)
Boost 7.5 lbs
Knock count has falled drastically; intake air temperature is lower, power has increased, and boost has dropped.
Intercooled & increased boost
Average intake air temperature at run end = 130 degrees (range 126-132)
Average knock count 42 (range 39-46)
Boost 9.2 lbs
Boost has been increased back to around the non-intercooled level. Air intake temperatures are high, as well as knock count.
Dyno Graph
Blue=non-intercooled, red=intercooled, green=intercooled + increased boost
From the increase in intake temperature over time it appears that my forward heat exchangers are too small. However, it was very difficult to blow much air through these heat exchangers on the dyno, so real world performance is likely to be better than the dyno.