I was thinking about it and people are alway's saying that they suck and their hard to tune etc. But that doesn't make sense cause isn't the granatelli already calibrated? If anything you would just have to tweak the MAF table's a little bit. But people do that anyway's with the stock ported one's so what's the difference?

 

Yes it is already calibrated but for what that is the problem no one knows what the calibration is for

 

But why does that matter? Why does one need to know what the calibration is for? Couldn't one just assume that the granatelli MAF is just set and ready to go out of the box? I mean if it read's linear than who care's? Why does one need to know what calibration it uses?

 

The Granatelli MAF sucks because of multiple reasons. One reason is that no one knows the calibration for it because it is suppose to already be programmed into the unit and sends the correct signal to the MAF. This makes it very difficult for tuners to adjust some parts of the programming to correctly calibrate for a Granatelli MAF. Second reason it sucks is because you pay WAY too much for something that really isn't going to give you any increase in power. Sure, you may see 1 or 2 HP increase. But you can port and polish (and please, for those of you people who are against this, don't start in on this thread with your opinions about how this screws everything up. Your just going to get my standard "If you are getting funny idles and part throttle surging it is because you didn't take the care to not damage the sensors, I've had mine P/P for over 2 years with NO problems" answer) your MAF and see the same increase, and all it costs you is 2 or 3 hours of your time, not $300 (or whatever the Granatelli MAF runs these days). Now please send me half of what you were going to pay so you can at least say you saved yourself some money rather than wasting it on something that does nothing.

 

After I learned to tune and understand what "tuning" means for our PCM's, it was then I realized that the stock MAF is all that is needed.

Anything aftermarket is wasting money PERIOD!