| to run too lean a mixture the combustion temperatures will exceed the thermal limits of the components and/or lead to mixtures that tend to detonate and create problems of its own. There isn't really a cut and dry rule to what mixtures one shoud shoot for as it is sensitive to the components within the system and to what levels they are being pushed to. The ideal A/F mixture isn't specific to a boost level because of this. You could have a setup with stock turbos, stock intercoolers, upgraded injectors, and have to run a 11.5:1 A/F at 18psi to keep things happy whereas with a larger set of turbos and upgraded intercoolers, you could run as high as 12:1 without any problems, not to mention the larger turbo'd setup would actually be producing more power just as safely - both of these conditions running 93 octane fuel. Over the years of tuning various Z32s equipped with EGT sensors we have been afforded the information on what the acceptable air/fuel mixtures should be for given setups.
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[ agpowers@bellsouth.net ] Enthusiasts soon understand each other. --W. Irving.
Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor.
Albert Einstein
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