Quote:
Originally Posted by ChazInMT
Anyway, all this is just thought exercise, I'm 99% certain no one has ever done a homemade cylinder deactivation and gotten outstanding results from it, power decreases immensely, the engine management system would hate it and need to be modified to the point of causing madness, and you may not see any gain in fuel efficiency.
|
Effective cylinder deactivation requires that the intake and exhaust valves be disabled. Homebrew methods involve physically removing parts of the valvetrain. There are a few members here who have actually done so, with reasonably good results, in terms of fuel economy gains.
I looked into cylinder deactivation as a method of saving fuel economy, and have come to the conclusion that it may be simpler to merely fool the engine computer into running leaner than normal, by feeding it a modified O2 sensor signal that makes it appear that the engine is running richer than it really is, and causing the engine computer to lean out the mixture to compensate.