Rich after Cam Swap
Rich after Cam Swap I went from a 250/250 114LSA Solid Roller Cam to 232/236 114LSA Hydr Roller Cam on my LS1 418CI. Also dropped the compression 1.5 points with different heads I'm setting up for a big blower.
Tuning is new to me and I have a pro doing it on a dyno next week but here what I need. I have EFI Live and a wideband. The car is running well crappy with the IAT plug unplugged it runs best I can actually rev it some. With the IAT plug out it will barely idle and any throttle chokes it out. I want to get this sorted out before I drive it to the dyno. Anyone have an ideas.
EFI Live say the commanded Air/Fuel Ratio is less 1:1. Once it gets in the 2-3K RPM range it runs smoother but still way rich. I do not have my wideband on yet but will work on that.
I didn't expect the new cam to throw it off this much anything I can do to help with little tuning knowledge.
Tuning is new to me and I have a pro doing it on a dyno next week but here what I need. I have EFI Live and a wideband. The car is running well crappy with the IAT plug unplugged it runs best I can actually rev it some. With the IAT plug out it will barely idle and any throttle chokes it out. I want to get this sorted out before I drive it to the dyno. Anyone have an ideas.
EFI Live say the commanded Air/Fuel Ratio is less 1:1. Once it gets in the 2-3K RPM range it runs smoother but still way rich. I do not have my wideband on yet but will work on that.
I didn't expect the new cam to throw it off this much anything I can do to help with little tuning knowledge.
Ok the issue was related to the fuel system I setup -8 feed and -6 return with a regulator at the fuel rails. I had to up the fuel pressure on the reg after that it idles and will rev with the IAT sensor plugged in. Turns out it wasn't getting enough fuel or not a consistent amount.
That issue aside which really wasn't related to the tune it does the following
-idle is OK could be better
-hesitation upon advancing throttle from idle requires feathering
-some backfire evident bringing the rpms down
Here is the efilive scan log file. At the 400 frame mark I brought the power up slightly. Let me know if I should monitor something else.
Thanks
That issue aside which really wasn't related to the tune it does the following
-idle is OK could be better
-hesitation upon advancing throttle from idle requires feathering
-some backfire evident bringing the rpms down
Here is the efilive scan log file. At the 400 frame mark I brought the power up slightly. Let me know if I should monitor something else.
Thanks
