Guest De Schmaydee Posted March 6, 2003 Share Posted March 6, 2003 ....i just ordered the jwt ecu upgrade for my 82zxt.....it uses the 420cc inj and a cobra maf.....i've heard its the maf from a 93......(oem p/n F1SZ-12B597A).......i've heard that the Granatelli line of ford parts are much better than stock and i can get one of them for $259 as opposed to $300 for a (probably) stock one from JWT....does anyone have any insights on this?....or a part number off the maf in the JWT kit? thanks, ......s Quote Link to comment Share on other sites More sharing options...
Mudge Posted March 6, 2003 Share Posted March 6, 2003 The aftermarket units play with "calibration" and I dont generally like them, nor do they generally perform. If the ends of the MAF are larger then maybe thats an excuse to get it, otherwise I prefer to do my tuning elsewhere. Many people in fact lose performance from the aftermarket MAF. Genral tips, if your MAF comes with a plenum, leave it, if it comes with a screen, leave it. I worked mine over and made tuning a bit of a hell for me, its an example of "free mods" gone too far. So if you can find a good junkyard unit and the MAF ends aren't too different in size I wouldn't sweat it, stock MAFs on the Fbody that people think sometimes as "small" have gone into the 9s, bone stock, screen and all. I dont know the Stang MAF end size, but people sometimes believe there is a restriction where there isn't one. If all you can find is brand new, and the Granatelli is cheaper, then I guess I'd go that route, begrudgingly. I'd rather hit a yard or eBay though. Good luck Quote Link to comment Share on other sites More sharing options...
Guest De Schmaydee Posted March 6, 2003 Share Posted March 6, 2003 the stock ones are a lot cheaper.....they seem to be 70mm-90mm.....the ones they show in the picts look like they just have 2 little wires running down the middle of 'em ........s Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted March 6, 2003 Share Posted March 6, 2003 If the throat is bigger, and I believe it is, this could be a good way to run large injectors with a factory Z31 computer. You can tune it with fuel pressure. A more elegant solution than what I'm doing, which is hacking up a perfectly good Z31 MAF, and installing it in a big intake pipe (3-1/2"). Quote Link to comment Share on other sites More sharing options...
Mudge Posted March 6, 2003 Share Posted March 6, 2003 Those "wires" are about paperclip thickness, strong paperclip that is. From there crossing each of them, there are the real "sensors." A MAF is just a heater circuit, and once heated it takes a certain amount of air to cool it a certain amount, and that is how they do thier calculations to estimate airflow, instead of speed density where MAP and I think TPS were used together, or maybe it was MAP and intake air temp (IAT). The issue with running a MAF on a blown/turbo car, is a MAF can only read so much airflow. With a 2-3 bar MAP you are just about limitless. There are tricks to work around this, but tricks can be risky instead of having an actual reading to go with. Quote Link to comment Share on other sites More sharing options...
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