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or what could be used, safc, greddy emanage? im just doing research right now so when the time comes i know what to get.

As of right now, we don't really use anything at all, as nothing is/has been made for us. The Perfect Power from Rallitek is under works, though..

I think this has to do with the goals for your car. Are you going to go aftermarket fuel, boost, and etc. you could get a DOHC setup and I would say a type R Apexi control. I have been continplating this myself and have seen the potential of our blocks. If your want to build a cruiser/ power when you need it then there is a lot of different devices but they all have there disadvantages. If you want to biuld a 300hp monster then plan you management around your engine.

Also, a couple of people on the board are working on the LegaCU, a currently experimental piggyback engine management system specifically for our cars.

I talked with Sean up at Rallitek on tuesday when I was in the area. The perfect power really sounds like a pretty good, capable, easy to use, and tunable piggyback for the cost.

Depending on where development is for the various projects that are out there, I will more then likely be using the perfect power. I'll couple that with larger injectors, larger turbo, and larger MAF.

im looking perfect power too but i still want to try out the legacU as well

I use the s-afc II and the apex'i ITC still needs to be installed.

Josh - What MAF do you plan on using?

BAC5.2 wrote:Josh - What MAF do you plan on using?

Well, Sean mentioned I could use a WRX one.....I still need to look into things a little further, but I'll probably either use the wrx one or the black JEC's maf.

The black JEC's will require less scaling of the entire MAP vs the WRX one, but the WRX should allow for more flow, and less restrictive of an intake.

That's my main concern: Having to re-map EVERY MAF voltage.

If I had something like the Element Hydra ECU, that would be easy, but doing something like that with a perfect power or an e-manage, might not be so easy. I need a piggy back that's innexpensive and allows 3D mapping. I also need 99 billion dollars.

BAC5.2 wrote:That's my main concern: Having to re-map EVERY MAF voltage.

If I had something like the Element Hydra ECU, that would be easy, but doing something like that with a perfect power or an e-manage, might not be so easy. I need a piggy back that's innexpensive and allows 3D mapping. I also need 99 billion dollars.

Unless Vikash figures a way to use the JECS MAF or similar.....I really don't see any other way around it. That's the only way to do it so things work properly.

BAC5.2 wrote:That's my main concern: Having to re-map EVERY MAF voltage.

wont you have to do that if you use something like 800cc injectors??? whats a bigger maf? if anyting it makes it easier to tune.

I think the quickest path to victory is for me to experiment with a WRX MAF and a wideband O2 sensor. So you don't really have to tune. The LegaCU should allow for this.

Does anyone have specific information on the WRX airflow sensor? Voltage range? reading range? transfer function? table? anything?

Edit: anyone have a spare?

dzx wrote:I use the s-afc II and the apex'i ITC still needs to be installed.

how is the safc2 working for you?

what can the perfect power do?

free5ty1e wrote:I think the quickest path to victory is for me to experiment with a WRX MAF and a wideband O2 sensor. So you don't really have to tune. The LegaCU should allow for this.

Does anyone have specific information on the WRX airflow sensor? Voltage range? reading range? transfer function? table? anything?

Edit: anyone have a spare?

What I've highlighted on page 8 may be of interest

Mackenzie wrote:

dzx wrote:I use the s-afc II and the apex'i ITC still needs to be installed.

how is the safc2 working for you?

what can the perfect power do?

The perfect power can do fuel & ignition control. There's an additional controller for NOS or something else.

K has one, and could probably give you more specifics. www.rallitek.com sells them.

Thanks Josh! That's exactly what I needed. I can figure some things out from there.

Which WRX is this MAF standard on, the 2002? (yay, I can read file names!) What's the Subaru part number so I can order one to experiment with?

Our MAF reads about 265 CFM @ 4.5 volts (@85*F), which I believe is it's max reading.

This WRX MAF, by the same conversion, reads about 435 CFM @ 4.5 volts (@85*F) at its max reading. That would definately give us a usable range for some larger turbos.

And it would be easy to find, seeing as how the WRX owners are so keen on wrapping their cars around trees......

Did Subaru use this sensor on just the 2002 Impreza WRX? Or is there perhaps a range of WRX model years that this could be sourced from in junkyards?

Is there a reason this MAF was selected? Is it very available? Is it the highest range airflow meter Subaru makes in the configuration our cars use?

I don't know the part #, but I would assume that the 2002+ WRX's would all have this sensor.

You could call your local subaru dealer and ask them the part # and what other models it interchanges with. If you don't get anywhere with that, I can probably get you some answers.

Well, what is the reasoning behind wanting to use one of these as opposed to say, an aftermarket MAF sensor? Or the STi MAF sensor?

If I'm going to calibrate my firmware to read another MAF sensor, I'd like to select one that's cheap, very available either in Autozones or junkyards, and with a large enough range to tune for 16G - 18G turbos. I can read anything, it does not have to be Subaru-style. I can convert it to the output that the computer expects...

In short, I think the only reasonable constraint for us is fitment - it would be a lot easier to swap MAF sensors if the new one also adapted directly to the airbox and intake tubing. Or maybe we can just swap sensors out of the housing? That opens up pretty much any hot-wire MAF sensor, right?

The safc II works the way it was designed to, it keeps the a/f ratio where i wanted it to be safe.

greddy emanage doesn't work very well on subarus because the ecu processors on subarus are to fast. You will tune it and the ecu will be like... no i don't like that you are going back to stock. They work good on hondas and toyotas. The perfect power is a good unit and the price is good too. I ,personally, I'm running a link stand alone and I like it, but it takes alot of little tuning. Brydon at rallitek has been great with helping me with all my tuning needs.

can i ask you guys what wrx are you going to get the maf sensor off of, arent the maf sensors on the throttle bodys.

free5ty1e wrote:Well, what is the reasoning behind wanting to use one of these as opposed to say, an aftermarket MAF sensor? Or the STi MAF sensor?

If I'm going to calibrate my firmware to read another MAF sensor, I'd like to select one that's cheap, very available either in Autozones or junkyards, and with a large enough range to tune for 16G - 18G turbos. I can read anything, it does not have to be Subaru-style. I can convert it to the output that the computer expects...

In short, I think the only reasonable constraint for us is fitment - it would be a lot easier to swap MAF sensors if the new one also adapted directly to the airbox and intake tubing. Or maybe we can just swap sensors out of the housing? That opens up pretty much any hot-wire MAF sensor, right?

I'd use a GM 3" MAF. They can be found in almost ANY GM vehicle, and I'd imagine they are all the same or similar. I got one out of a Lumina with the 3800 Series II engine (I think that was it).

DSM guys use these with GREAT success.