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

Reply  Post New Thread
Submit Tools LinkBack Thread Tools
Old 12-09-2022, 02:18 AM   #11 (permalink)
Master EcoModder
Join Date: Jan 2012
Location: United States
Posts: 1,742

spyder2 - '00 Toyota MR2 Spyder
Thanks: 104
Thanked 402 Times in 309 Posts
I don't think there's any significant inherent efficiency loss from those headers, it's mainly that you're now running suboptimal spark timing. If you adjusted valve timing, EGR, spark timing, etc. you would most likely find the mpg is basically the same as before.

Headers have a lot of influence on exhaust backflow and thus charge dilution and optimal spark timing, and spark timing being off a few degrees is enough to lose a lot of efficiency.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

Reply  Post New Thread

Thread Tools

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2023, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com