Advanced Resonance Tuning (ART Pipes)
#1008
#1009
#1010
No but many times a power mod is actually more efficient. I even measured a 2%-3% increase in fuel efficiency in ART pipe development.
Another thing that often happens is people will use the extra power provided by a modification which will use more gas in the process.
Also, one thing you can do is dyno test to see where your A/F ratio is. If you find it is running rich its easy to fix with a tune.
Another thing that often happens is people will use the extra power provided by a modification which will use more gas in the process.
Also, one thing you can do is dyno test to see where your A/F ratio is. If you find it is running rich its easy to fix with a tune.
The decrease in fuel efficiency is related to the long term fuel tables and is evidenced by Uprev Cipher data logs on primary vs secondary O2 sensors.
The following users liked this post:
Invalid_User (04-08-2012)
#1011
#1012
The following users liked this post:
StratagemII (04-08-2012)
#1013
The ART pipes do not cause a decrease in fuel efficiency. It seems there may be a air leak somewhere in the system. Air leaks can actually let air in the exhaust flow during the scavenge phase of the exhaust pulse. When air gets in, the A/F sensor reads excess oxygen in the system and thinks its running lean so it adds in more fuel to compensate, but adding more fuel to an already properly tuned system means its now running rich.
Check for a leak near the inlet flange.
Check for a leak near the inlet flange.
#1014
#1016
The ART pipes do not cause a decrease in fuel efficiency. It seems there may be a air leak somewhere in the system. Air leaks can actually let air in the exhaust flow during the scavenge phase of the exhaust pulse. When air gets in, the A/F sensor reads excess oxygen in the system and thinks its running lean so it adds in more fuel to compensate, but adding more fuel to an already properly tuned system means its now running rich.
Check for a leak near the inlet flange.
Check for a leak near the inlet flange.
http://my350z.com/forum/tuning/55203...and-input.html
#1017
#1018