---===The Official MAFT-Pro Thread===---

[msassoon]

Did you wire up the timing control? If so, it should be 2.

[OwnGTP/WantRTTT]

No I'm not using Timing Control yet.

[SuperchargedWS6]

Wow, it's hard to find info in a 200page thread

I'm planning on installing a maft pro and initially running it in AFC mode this summer, switching it to speed density this winter. I'm ordering a Boomslang MAFT harness with ignition control for my 94 VR4.

My question is this: Are the ECU connections different for AFC vs. speed density? I don't want to have to modify the boomslang harness.

From the reading I have done, it appears the ECU connections are the same and all I would have to do to switch from AFC to speed density is to disconnect my MAF, install the GM 3 bar map and temp sensors, install the 2G/3S speed density harness which connects the temp sensor and map sensor to the factory MAF harness, and then change the config in the MAFT pro for speed density. Is this correct?

Thanks.

[msassoon]

I am re-installing the supercharger next week, and want to clarify a couple of things.
I am not using a boost controller, so I guess the MAP sensor is figuring out the boost values. I should still be able to use some of the functions (such as Boost enrichment), but I do not need to touch anything in the boost control section right?
Also, what does the setting for engine size do? So, if I had bored out the engine to 3.1 litres, do I increase this value? As a supercharger gives constant boost, it is almost as though I have increased the displacement. Therefore, can I just increase this setting and the MAFT Pro will account for that? I will be adjusting the mainscale for the bigger injectors, but want to know if this will help.

[TurboBob]

Originally Posted by SuperchargedWS6

Wow, it's hard to find info in a 200page thread

I'm planning on installing a maft pro and initially running it in AFC mode this summer, switching it to speed density this winter. I'm ordering a Boomslang MAFT harness with ignition control for my 94 VR4.

My question is this: Are the ECU connections different for AFC vs. speed density? I don't want to have to modify the boomslang harness.

From the reading I have done, it appears the ECU connections are the same and all I would have to do to switch from AFC to speed density is to disconnect my MAF, install the GM 3 bar map and temp sensors, install the 2G/3S speed density harness which connects the temp sensor and map sensor to the factory MAF harness, and then change the config in the MAFT pro for speed density. Is this correct?

Thanks.

Get the Boomslang Translator mode harness (make sure it has the air temp and baro connections) and the Speed Density plug-and-play harness (9 foot) from Full Throttle. (do not get the vehicle specific harness, get the universal)

Bob

[TurboBob]

Originally Posted by msassoon

I am re-installing the supercharger next week, and want to clarify a couple of things.
I am not using a boost controller, so I guess the MAP sensor is figuring out the boost values. I should still be able to use some of the functions (such as Boost enrichment), but I do not need to touch anything in the boost control section right?
Also, what does the setting for engine size do? So, if I had bored out the engine to 3.1 litres, do I increase this value? As a supercharger gives constant boost, it is almost as though I have increased the displacement. Therefore, can I just increase this setting and the MAFT Pro will account for that? I will be adjusting the mainscale for the bigger injectors, but want to know if this will help.

1. Basically right. MAP is used to calculate airflow, so you need the sensor. A supercharger doesn't need boost control, so you can ignore that page.

2. The engine size is part of the airflow calculation. Boost pressure is handled by the MAP sensor, so set the displacement to the actual engine size.

Bob

[SuperchargedWS6]

Just so I am sure, get the boomslang harness for the translator function (even though I am running AFC) with the factory harness air and baro connections. Does that mean that the factory air and baro connections will be replaced by the universal speed density cable when I go speed density?

Also, I only see a 6ft universal harness for sale.

Thanks.

Originally Posted by TurboBob

Get the Boomslang Translator mode harness (make sure it has the air temp and baro connections) and the Speed Density plug-and-play harness (9 foot) from Full Throttle. (do not get the vehicle specific harness, get the universal)

Bob

[TurboBob]

Originally Posted by SuperchargedWS6

Just so I am sure, get the boomslang harness for the translator function (even though I am running AFC) with the factory harness air and baro connections. Does that mean that the factory air and baro connections will be replaced by the universal speed density cable when I go speed density?

Also, I only see a 6ft universal harness for sale.

Thanks.

I don't know that much about the boomslang stuff. I'm not sure exactly how they configure it. I always splice mine in. Its not hard.

Call them and talk to mike. Make sure you don't get the 3 foot vehicle-specific harness, but the universal speed density harness. 6 foot might be enough, but the harnesses don't stretch much..........

Bob

[SuperchargedWS6]

OK,

To confirm my understanding of this setup: I finally looked at the wiring diagrams for the maft pro, which I should have done before I started asking questions. I compared the difference between AFC, Translator and Speed density modes. I would like to confirm the following:

AFC mode: Translator takes in MAF, RPM, and TPS, and outputs corrected MAF signal. In this case, the MAF signal gets disconnected from the ecu, maf sensor signal goes into maftpro and maftpro outputs corrected signal to ECU. In this mode, factory IAT and Baro sensors still go directly to ECU and do not get intercepted. This is the initial mode I want to run in, so the boomslang harness should have a cut MAF signal line with sensor side to maftpro and ecu side to maftpro output. Boomslang harness should also have the rpm, tps, +12V and grnd signals tapped into.

Translator mode: same as above, but IAC and Baro sensor signals get cut and routed into maftpro, maftpro outputs corrected signals to ECU. This is a mode I will not be running in.

Speed density: Same as AFC mode, but MAF signal gets completely removed and therefore not input into maftpro. Factory IAT and Baro sensor lines get cut. Factory sensor signals do not get fed into Maftpro. Aftermarket IAT and Baro sensor signals get input to maftpro through generic speed density harness. ECU side of IAT and baro signal lines should be connected to the maftpro.

So, I should buy a boomslang harness designed for AFC mode with the connections listed in my AFC mode description above. To convert to speed density from AFC configuration I would: disconnect the factory maf, cut the baro and IAT lines on the boomslang harness, do nothing with the sensor side of the harness, connect the ECU side of the harness to the Vout terminals on the maft pro, then connect the aftermarket IAT and Baro sensors to the maftpro with the universal speed density harness.

Does this sound correct? The confusing part is how factory IAT and baro sensors get used. In AFC I want to be certain my understanding is correct that they go directly to the ECU with no MAFTpro intervention. In speed density I want to confirm my understanding that the factory sensors get disconnected, aftermarket sensors are hooked to the maftpro, and the maftpro then outputs corrected IAT and baro signals to the ECU.

[runner4053]

Doesn't boomslang make a stock "extension" between the ECU and engine harness. If you are set on a boomslang harness, just get that stock one and wire the Maft-pro into that. Then clip in the boomslang harness. That would be much simpler than what you're doing.

I'd recomend just wiring into the stock wires. If you're worried about damaging your factory wiring, just leave enough wire behind that you can convert back if you choose. It's really not that damaging. Just a few taps and splices.