Quote:
Originally Posted by 351mustanger
Post your afr readings when you get them. I am with x-bird on tuning. It shouldn't matter about engine size. Fuel choice will change the optimum ratio. And compression ratio will determine how picky the engine is and how accurate you need to be. The higher the compression the less tolerance it will have for a lean condition.
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Thats what I thought when I first started messing with these is that I was going to get a sweet 12.5 to 1 and be golden but it sure taught me otherwise. You start getting fatter than that and these little bore machines start choking out.