I'm a newbie trying to learn how to program (165 ECM, $32B). I'm currently building a motor and I bought a OBDI Tuner Pro Kit from Tunercats to tune the new motor when it's in the car. I heard that you can get around 30 HP out of a stock L98 by tuning, but what would I tune? Timing tables? MAF tables? I have all the hardware installed in the PCM, and I took a short data sample while driving around town with the stock motor. I've searched and searched on stuff for programming $32B, but I'm still lost as to where to start. I'm trying to become familiar with the software so that when the new motor is in the car I will have a better idea of what I'm doing. Thanks.

 

I would give it a better timing table and faster more aggressive timing curve to start and run 93 oct gas. Then monitor air fuels and find where max power is. Some of these cars run richer from factory than optimal but you need to play around. 30 hp? I doubt it but certainly hp on the table. 10-15 likely

 

I should be starting out with part throttle mods first, right? Should I just increase the advance across the board? Sorry, I'm really new at this. Also, can I do this without a WBO2, and if not how do I go about installing one?

 

Yeah i would check closed loop operation part throttle first but i'd still adjust timing table and put in good fuel, then drive checking part throttle, fueling items like blm and int and spark retard. Timing will change blm values to some degree so adjust timing, recheck fueling. Its a process

For timing i like smoothing out the table and bringing in timing advance earlier in the rpm range closer to wot. Or for maf, closer to peak lv8 values. Mid range cruise i try to run as much timing as possible but its not always best. Kinda need to find what car likes. Stock tables have alot of dips and valleys. Look at the 3d view and you will see. I typically smooth that out and add/subtract timing in spots to make it more smooth. For stock car, dont need to change much at idle or low load areas but can alter cruise rpm and lv8's timin for 93 oct and mainly wot timing from 2800 rpm on up to redline for lv8's over 170-180.

You can do wot via narrowband voltage but its hit or miss. Not as accurate. General rule is target 900 mv. No richer than 915-920 in my experience. No leaner than 890. Thats where i would target before checking with dyno wideband, checking plugs or buying a wideband o2.


Wideband kits have a sensor and databox that need wired in, depending what you get. Some may just be a sensor and a gauge. Need a new bung welded in although some wb can also simulate narrow bands so you can have one sensor to do both