Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Cold air VS Warm Air Intakes

Rower4VT · 07-09-2008, 07:50 PM

The idea of using a resistor on Acura/Honda engines to trick the ecu into thinking the intake air temp is "normal", when using a WAI, would probably work. I'm pretty sure Acura/Honda ecu's retard timing automatically when the IAT is high...beyond the point that would be needed to avoid knock. I have no way of measuring my ignition timing while driving as my car is pre-OBD-II, however I plan on running my WAI for a few tanks, then will add a resistor to reduce "measured" IAT by 80-100 degrees. Then run a few more tanks and see if there is a difference. The bonus with my set up is that I'm running E85 which is 105 octane, so knock is not really a concern.

Question: For the same given power output of an engine, would the vacuum be higher or lower when the intake air temp is significantly higher?

07-09-2008, 07:50 PM	#47 (permalink)
Rower4VT 94 Acura Vigor "FlexFuel" Join Date: Feb 2008 Location: Omaha, Nebraska Posts: 26 Thanks: 0 Thanked 0 Times in 0 Posts	The idea of using a resistor on Acura/Honda engines to trick the ecu into thinking the intake air temp is "normal", when using a WAI, would probably work. I'm pretty sure Acura/Honda ecu's retard timing automatically when the IAT is high...beyond the point that would be needed to avoid knock. I have no way of measuring my ignition timing while driving as my car is pre-OBD-II, however I plan on running my WAI for a few tanks, then will add a resistor to reduce "measured" IAT by 80-100 degrees. Then run a few more tanks and see if there is a difference. The bonus with my set up is that I'm running E85 which is 105 octane, so knock is not really a concern. Question: For the same given power output of an engine, would the vacuum be higher or lower when the intake air temp is significantly higher? __________________ E85 ~$3.17/gal.