Machwon

Hey all I am considering buying one of these mafias for my GT. As of right now it has a P1 SC with a custom tuned Diablo Chip, and Stock MAF. Its not pegging at the moment but I know it is dangerously close, and the fact that I live at almost 7K feet might have something to do with it working and not pegging with the stock MAF for now. Anyways I really don't want to fork out the money for a new tune once I return to KS, (all use SCT software there) so to save money I was wondering if I was to get a MAfia and set it at 3 (or what setting you guys would recommend)- if it would work without any further tuning. Of course I would still have a a/f monitored dyno run shortly after the install to insure everything is fine. Just looking for some info on these things as i'm not extremely knowledgeable about them yet. Thanks

Machwon

bump...need info here guys

2000GT4.6

I think it is a horrible idea to upgrade your MAF without at least checking it on a dyno. More than likely you are going to need a retune.

90 mm Lightning MAF FTW!

ShadowDrake

The instructions for setting the MAFia, if I remember right, go as follows... they say start it on the #1 setting, do a dyno run, watch your MAF voltage, if it pegs, stop the run, set the MAFia up to 2... repeat run... and just keep doing this till you hit a point where your MAF isn't pegging it's voltage through a full pull.

DROES99STANG

ok stupid question here. what in the world is a MAFIA???? besides the soprano type!

ShadowDrake

DiabloSport makes this handy little box you plug in-line with your MAF that will stop the ECU from seeing a maxed out voltage, so it gets an accurate reading of how much air is going through... of course when you change the setting on it, you need to adapt the fuel curves to be more rich to come out with the same A/F ratio.

Machwon

Well I happen to have a 90mm Lightning MAF setting in my garage but havnt figured a way to adapt it to the ATI tubing. It is already calibrated for 42lbs and has been ran with a Diablo chip, but how in the heck to I get it to fit in place of the stocker? All help is much appriciated! Also I have a Wideband sensor so I can tell- to a certain extent what the a/f is like.

ShadowDrake

I can't help you with fitment issues... When you change the setting on the MAFia you can expect your A/F ratio to become more lean because the MAFia lessens the signal coming from the MAF. The ECU will think there is less air coming in. To counter this, you add more fuel for the air it thinks is coming in and you can still end up with a correct A/F ratio.

Try calling ATI (will probably have to be monday) and ask if there is a way to fit the lightning MAF on there.

04BlueGT

I dont' mean to hijack the thread, but will a wideband sensor work with the stock computer without throwing a code? In the future I want to S/C the car and add a A/F meter. I'm told that wideband is the best way to monitor A/F in conjunction with the gauge. So, will it work with the stock computer and wiring? If not, how in the hell do you make everything work?

ShadowDrake

Tap your wideband O2 in somewhere else, leave the factory narrowband oxygen sensors hooked up to the ECU... the wideband is totally separate from any of the car's other systems. Just wire the wideband up to your new A/F meter.