As though I need another project, but bear with me for a bit.
The WAI can conceivably save me fuel now that I have the TC lock override on my car. I do NOT like the lack of power from having a WAI on all the time so I've come up with an idea and here it is:
Take a heater core from a junkyard and place it in the filter box just under the filter and run hoses to the regular coolant system. EGR is meant to activate when you are under steady cruise and not accelerating or under heavy load(when I need power). What I think I should do is tie in a signal from the EGR system to a control valve so hot coolant only flows through the heater core when the EGR system is active. There will be some latent heat in that core when the valve is closed but should dissipate quickly enough.
Should work? If I want to go a bit more into it I could make it where the TC override being activated also forces the WAI system on.
almost every chevy, early 90s and older, has a diverter door in the snorkel coming off the large circular air filter housing over the engine. typically (and what's in my truck) it's set up with a thermo-mechanical vacuum switch and a vacuum servo operating the door to pull air either from a CAI to the fender or from a tube going to a heat-shield around the manifold. in my truck it tries to maintain about 100-130f intake temp. if it's too cold, the switch opens the vacuum line to the servo moving the door to block off the CAI and open up the WAI from the manifold. could use something like that but with an electromechanical vacuum switch.
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"