Well...I've been a while out there with my MAFT pro and finally got some experience with it and it's time for a review...
...First of all...here's a link for the maft pro (www.maftpro.com) This is like a modern version of the vpc, it's better in every aspect.
-When you first get it, you get the maft pro itself with its respective harness. You usually want it for speed density so you have to buy the plug 'n play harness (connects the GM MAP and IAT to the factory MAF plug...pretty nice) and the sensors. Connect all the wires and when you turn it on for the first time you have to do a basic setup, where you have to enter the Displacement of your engine, # of cylinders, Airflow source, Map source and some other things and feautures you may use. After this, I believe it chooses the right VE table (Volumetric Efficiency) so you can start the car.
Since every car is different, your car may start lean, rich or just good, so you have a main scal adjustment which is like a gain for the whole curve. After this you go to regular tunning, with a lo load, mid load and high load tune values. They consist in 14 tunning points(from 400rpm to 7,600rpm and you can increase or decrease fuel in 0.5% increaments up to 64%.
After this tuning is done(or while tuning) there's some response values you have to tweak with. There's 3 TPS settings and 2 MAP settings. TPS settings are: Tps enrich: this is the amount of fuel added at tip-in, TPS decay: this is the rate at which the tps enrich is removed, and TB size: this is a value that moves the enrichment earlier or later on the throttle travel. Map settings are the same as the TPS. You also have a MAP/TPS min value, where you set the value(tps volts) where you want the map enrich to take over tps enrich. After you have tuned the load points and the response, your car should be driving pretty much like stock
...
Well...this review is looking more like an instruction manual, so let's have some fun. Yesterday I did my first log with WOT closed loop...yes, WOT CLOSED LOOP!. This is done with a wideband sensor. You set a target A/F ration on the maft, and it will add or decrease fuel to keep in that A/F ratio. So, here's a few pictures of my logs:
In this picture you can see the amount of boost creep I have. My boost is suposed to be at 15 psi, and it creeped to 29 psi @ 7,300rpm
To enable the A/F ratio tracking, you have to set some parameters, like tps, map and rpm at which the maft will enable the WOT closed loop. Mine is set to 4.8v tps, 1 psi and 3,200 rpm, when all these values meet, the maft will start compensating to keep your target A/F ratio, that's why here at 3,200rpm, you see on the Closed Loop correction percent graph(last one on the page) is adding fuel to keep my AFR of 11.0. This is like a trim which shows how much the maft is adding or decreasing fuel to keep the A/F ratio. You also see that the AFR is kind of oscillating, but that's because I have to lower a bit the gain of the AFR correction, which is the speed at which the maft will try to correct the AFR.
You can also view your logs in a different way that a graph, like here...it's kind of a dash. You can see here that the Maft is adding 5.47% of fuel to keep my AFR of 11.0, and the intake temp is 101 degrees at 26 psi, while the outside temp was like 94...that intercooler is kicking some ass there!...not bad
Well...the maft pro can control timing at Wot too. You need a keydiver chip for this. If you already have one, you can upgrade to this feauture for a couple of bucks. It also can control boost with an optional GM boost sensor...which I'll probably be buying soon
.
Well...this is it...my Maft pro is working AWESOME! for me...I'm going to get some dyno #'s and track #'s too, so wish me luck...I'll post them here as soon as I get them
...First of all...here's a link for the maft pro (www.maftpro.com) This is like a modern version of the vpc, it's better in every aspect.
-When you first get it, you get the maft pro itself with its respective harness. You usually want it for speed density so you have to buy the plug 'n play harness (connects the GM MAP and IAT to the factory MAF plug...pretty nice) and the sensors. Connect all the wires and when you turn it on for the first time you have to do a basic setup, where you have to enter the Displacement of your engine, # of cylinders, Airflow source, Map source and some other things and feautures you may use. After this, I believe it chooses the right VE table (Volumetric Efficiency) so you can start the car.
Since every car is different, your car may start lean, rich or just good, so you have a main scal adjustment which is like a gain for the whole curve. After this you go to regular tunning, with a lo load, mid load and high load tune values. They consist in 14 tunning points(from 400rpm to 7,600rpm and you can increase or decrease fuel in 0.5% increaments up to 64%.
After this tuning is done(or while tuning) there's some response values you have to tweak with. There's 3 TPS settings and 2 MAP settings. TPS settings are: Tps enrich: this is the amount of fuel added at tip-in, TPS decay: this is the rate at which the tps enrich is removed, and TB size: this is a value that moves the enrichment earlier or later on the throttle travel. Map settings are the same as the TPS. You also have a MAP/TPS min value, where you set the value(tps volts) where you want the map enrich to take over tps enrich. After you have tuned the load points and the response, your car should be driving pretty much like stock
...Well...this review is looking more like an instruction manual, so let's have some fun. Yesterday I did my first log with WOT closed loop...yes, WOT CLOSED LOOP!. This is done with a wideband sensor. You set a target A/F ration on the maft, and it will add or decrease fuel to keep in that A/F ratio. So, here's a few pictures of my logs:
You must be logged in to view this image or video.
In this picture you can see the amount of boost creep I have. My boost is suposed to be at 15 psi, and it creeped to 29 psi @ 7,300rpm
You must be logged in to view this image or video.
To enable the A/F ratio tracking, you have to set some parameters, like tps, map and rpm at which the maft will enable the WOT closed loop. Mine is set to 4.8v tps, 1 psi and 3,200 rpm, when all these values meet, the maft will start compensating to keep your target A/F ratio, that's why here at 3,200rpm, you see on the Closed Loop correction percent graph(last one on the page) is adding fuel to keep my AFR of 11.0. This is like a trim which shows how much the maft is adding or decreasing fuel to keep the A/F ratio. You also see that the AFR is kind of oscillating, but that's because I have to lower a bit the gain of the AFR correction, which is the speed at which the maft will try to correct the AFR.
You must be logged in to view this image or video.
You can also view your logs in a different way that a graph, like here...it's kind of a dash. You can see here that the Maft is adding 5.47% of fuel to keep my AFR of 11.0, and the intake temp is 101 degrees at 26 psi, while the outside temp was like 94...that intercooler is kicking some ass there!...not bad
Well...the maft pro can control timing at Wot too. You need a keydiver chip for this. If you already have one, you can upgrade to this feauture for a couple of bucks. It also can control boost with an optional GM boost sensor...which I'll probably be buying soon
.Well...this is it...my Maft pro is working AWESOME! for me...I'm going to get some dyno #'s and track #'s too, so wish me luck...I'll post them here as soon as I get them
