ECU Data at the track - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

jkof08 · 08-07-2013, 03:01 PM

Ok so i have an intune and i need some one to explain what these numbers are and what they should stay at for the best performance. i know a few like IAT, speed, engine speed, but what about the rest. any help would be great.

Rhino79 · 08-07-2013, 03:27 PM

Short terms fuel trims are instant fuel corrections applied, long terms are an average of the learned short terms over a period of time.

MAF g/s is the amount of airflow reported to the ecm.

Spark is the ignition timing.

ECT is coolant temp

I would suggest logging KR (knock retard) and replace the control module volts with it. Your spark knock is a key ingredient in tuning for performance and reliability. If you see 3* of KR in a given rpm range, reduce timing by half that amount and try again.

Also log o2MV for bank 1 and 2. If you don't have a wideband, use these to dial in fuel at wot. Target 870-890 MV, that will be roughly a safe 12.4-12.8 afr.

08-07-2013, 03:01 PM	#1
jkof08 Drives: Black 2SS/RS Join Date: Mar 2013 Location: Valdosta Posts: 294	ECU Data at the track Ok so i have an intune and i need some one to explain what these numbers are and what they should stay at for the best performance. i know a few like IAT, speed, engine speed, but what about the rest. any help would be great. Attached Images __________________ C.A.I. CAI, FlowMaster Pro Series, 1LE Strut Brace, Ported Throttle Body, Vengeance Tune, JRE Scoop, MSD Wires, 3.70 Gears, Stainless Works LT Headers and Hi Flow Cats, Pro Torque 3500 stall, LS3 Conversion Stage 2 TSP Port & Polished Heads, Kaotik CAM. 18x10 Forgestar F14 wrapped in 305/45/18 MT Street ET II's 12.068 @ 119.9 1.9 60ft (on 20' DR's with a VVT CAM)

08-07-2013, 03:27 PM	#2
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	Short terms fuel trims are instant fuel corrections applied, long terms are an average of the learned short terms over a period of time. MAF g/s is the amount of airflow reported to the ecm. Spark is the ignition timing. ECT is coolant temp I would suggest logging KR (knock retard) and replace the control module volts with it. Your spark knock is a key ingredient in tuning for performance and reliability. If you see 3* of KR in a given rpm range, reduce timing by half that amount and try again. Also log o2MV for bank 1 and 2. If you don't have a wideband, use these to dial in fuel at wot. Target 870-890 MV, that will be roughly a safe 12.4-12.8 afr.