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Message: <blockquote data-quote="SnakedMark8" data-source="post: 494629" data-attributes="member: 10115"><p>These guys are correct, don't try installing bigger injectors with a stock programmed EEC or an aftermarket (so called calibrated MAF). You will end up running very rich and possibly fuel wash the cylinders and worse. The correct way of setting up for bigger injectors is to have the EEC reprogrammed for them. The MAF doesn't dictate the size injector by the way. It's all in the programming of the EEC. Not to be confused with the aftermarket MAFs that are supposed to be calibrated for a sized injector. As you can tell I'm not a fan of the so called calibrated MAFs. Mostly because I am a tuner and for many years now and have yet to see a single one that was calibrated correctly or through it's full band. There are some though that are cheap and work fairly well such as the C & L as long as you don't get carried away with the thought bigger is better and go too big for your application. They use the stock Ford sensor and you just replace the housing and a sample tube for the size injector you want to run. Now that being said, the down fall of these and any so called calibrated MAF is that they skew the signal going to the EEC. To put it as simple as I can; they fool the EEC into thinking there is less air coming in than their really is. So when the EEC sees less air it shortens the injector's pulse width injecting less fuel. Since now the EEC is fooled into thinking less is coming in this also throws off the load calibrations. When this done your fuel and spark tables are now off also since they work on load and rpm. The older EEC IVs on the other had got away with more of this since their spark table was fixed to only rpm (Fox Body). Where as the SN95 and newer work as I described above.  I'm not trying to push you into going out and getting a custom program or to go with a calibrated MAF. I'm just letting you know both sides.</p></blockquote><p></p>