Quote:
Originally Posted by Christ
For the modder - fuel cut is merely a switch away.. since your fuel cut is partially controlled by the TPS, which is only a small pot anyway, you might be able to rig up another pot that shows the ECU 0 throttle whenever you want it to.
This probably won't work on speed/density (mass air flow) systems.
Anyway - the idea is that if you MUST leave it in gear, and leave the engine on, set it up so that you can manually cut the fuel, then open the throttle to 100% (least pumping losses for the engine). In this way, you can partially modulate the amount of engine braking that is actually being done.
This could be achieved using some type of switch and a rotary pot.
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I tried the open throttle on the Clunker when doing my 13 mile downhill. I switched off the key, and then tried going downhill in gear with the throttle both closed and open. It changed the sound of the engine, but didn't reduce engine drag at all. I think the only way to make that work would be to also hold the intake valves open, and my engine's an "interference" engine, so I think I'd end up with bent valves anyway.