Thread: LC-1 installed
View Single Post
beepbeep beepbeep is offline
Registered User
 
beepbeep's Avatar
 
Join Date: Jun 2001
Location: Sweden
Posts: 5,515
Nice graphs. No to rain on your parade but LC-1 or LM-1 without at least RPM logging is not terribly useful tool. AFR graph alone won't tell you much at all.

Most modern engines cut of fuel completely as soon as you lift off the throttle and RPM's are above idle. It saves fuel and gets rid of "popping" sound on overrun. 930 engine has a deceleration valve that is trying to do same thing. So those light throttle AFR peaks might not indicate that you have a leak.

The most important part is actually AFR/MAP vs. RPM. (full throttle run). Car won't ping on trailing throttle. Interesting part is how CIS behaves on full boost vs. RPM.
__________________
Thank you for your time,

Last edited by beepbeep; 09-10-2008 at 02:10 AM..
Old 09-10-2008, 02:03 AM
  Pelican Parts Technical Article Directory    Reply With Quote #4 (permalink)