Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now

Reply  Post New Thread
Submit Tools LinkBack Thread Tools
Old 03-11-2008, 11:37 AM   #1 (permalink)
Master Novice
elhigh's Avatar
Join Date: Jan 2008
Location: SE USA - East Tennessee
Posts: 2,293

Josie - '87 Toyota Pickup
90 day: 30.49 mpg (US)

Felicia - '09 Toyota Prius Base
90 day: 50.67 mpg (US)
Thanks: 409
Thanked 598 Times in 438 Posts
Homebrew Cylinder Deactivation

I can't do this on Josie, she's carbureted. But my Subie has individual injectors, and a lot of other cars out there do.

Aftermarket power chips are everywhere. Is anyone doing custom programs that would shut down some of the injectors under low-load conditions? I know most of the aftermarket chips are intended to increase power output with longer injector-on times etc, but if the programmers can do that, then surely they can go the other way?

I ask because I rented a new Impala for Thanksgiving that got about 28mpg at 75mph - that's great results for a big car making good time. That big V6 would switch to three cylinders and back again; I never noticed unless I checked the data panel. Imagine what I could get out of a smaller, older - and paid-off! - car if I could just install an aftermarket ECU chip that would shut down cylinders 2&4 at steady-state cruising?


Lead or follow. Either is fine.
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

Old 03-11-2008, 03:15 PM   #2 (permalink)
Master EcoModder
roflwaffle's Avatar
Join Date: Dec 2007
Location: Southern California
Posts: 1,490

Camryaro - '92 Toyota Camry LE V6
90 day: 31.12 mpg (US)

Red - '00 Honda Insight

Prius - '05 Toyota Prius

3 - '18 Tesla Model 3
90 day: 152.47 mpg (US)
Thanks: 349
Thanked 120 Times in 79 Posts
Frank knows it! I think pulling a couple pistons/rods or picking up a spare cam and grinding the lobes off is easier than repositioning the oxygen sensor. Speaking of which, are there any cars that have the Oxygen sensor in one of the runners and not in the manifold/downtube?

  Reply With Quote
Reply  Post New Thread

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cylinder deactivation discussion diesel_john EcoModding Central 87 03-10-2014 06:42 PM
Pulse and Glide Fuel Economy Calculator 4 valve / Cylinder newtonsfirstlaw DIY / How-to 25 11-04-2008 03:32 PM
direct cylinder injection oldschool EcoModding Central 3 02-24-2008 03:04 PM
Video: first high voltage power up: Mazda RX-7 with homebrew controller MetroMPG Fossil Fuel Free 1 02-10-2008 10:17 PM

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com