| My best advice to you is to buy a good chip program for your set up. It likely will be leaps and bounds better than you attempting to tune on your own with little experience. If you are going to continue on your own, here are a few of the details that will help...... The single maf program, with either single maf on the tee, or dual mafs set to add on a Selin, will max out the ECU scale at around 500 HP.
For the ECU to be able to read more air than 500 HP, it requires a dual pop program.
The dual pop program requires running the average setting on the Selin, or without a Selin it requires running a single maf and dummy maf with low speed drive-ability hose to split the idle air. More about dual pops here..... [ http://www.twinturbo.net/nissan/300zx/forums/general/view/2416119/Selin-Dual-Intake-and-dual-pop-history-with-Dyno-Chart.html ] Set your fuel pressure with vacuum disconnected to 43 PSI, when you plug in the vacuum line, this should be around 37 PSI. The K value for 740cc with today's fuel that contains 10% ethanol likes to be in the range of 325 to 350 for most set ups on a dual pop program (Selin set to AVG). Due to your small pipes, around 325 is probably close.
Your L value for good idle will be in the range of 800 to 850. This info will get you close, but with limited tools and knowledge, you basically have a license to get your self into trouble.
If you really plan on tuning on your own, you should at a minimum invest in a knock controller.
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