View Single Post
Old 12-25-2013, 06:59 PM   #9 (permalink)
t vago
MPGuino Supporter
 
t vago's Avatar
 
Join Date: Oct 2010
Location: Hungary
Posts: 1,808

iNXS - '10 Opel Zafira 111 Anniversary

Suzi - '02 Suzuki Swift GL
Thanks: 831
Thanked 709 Times in 457 Posts
Quote:
Originally Posted by ChazInMT View Post
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.
  Reply With Quote