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I have a motec unit in one of my cars but no O2. Oh that's right I tune it I don't run it in closed loop. got it.

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What about on the dyno? No A/F ratio there either? Individual runner temps???

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and my outlaw 10.5 car is mechanical fuel injected. If its not about fuel economy the 02 will never tell the whole truth. EGT's are good to see if all cylinders have the same temp in the pipe but to many variables there to....timing versus fuel.

I will say the 02 is the easy way to tune to get you close but there is still no substitue for max power in a drag car for pulling plugs.

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I don't understand why you don't like A/F numbers??? Thing is, most people WRONGLY assume that if you tune for a certain A/F number you'll make max hp....A/F numbers are EXACTLY like oil pressure numbers, tire pressure numbers and even a tach in that they DO NOT tell you what A/F you should run, or what oil pressure you need, or what tire pressure to run or where to shift...they are just numbers and the user has to be smart enough to know what numbers to shoot for...

IMHO, spark plugs and A/F numbers are no substitute for max power in a drag car for time slip incrementals, because at the end of the day, as long as it's not detonating, that's ALL that matters...

Now, having said that, once you tune for and find out what A/F your motor wants for max HP, it's easy to get there in different DA's while using A/F numbers...