I need some help. I know it's been discussed but I searched diligently and could not find the subject discussed. (One problem is that archive has gotten so large that there is a tremendous amount of sifting to find anything.) Can someone point me to the threads?
The theory of course is that running a tube from the intake snorkel back to the first catalytic will get to faster warmups and better cold weather efficiency. I am wondering if it has actually been tested and across what range of ambient temperatures. Also, is it something to improve mpg on long winter trips, or does it become counterproductive once everything is thoroughly up to temperature?
Help please