using an ARC 2 with a flashable ECU

[2fnloud]

Are they wired parallel then and one to each intake pipe?

[Checkered vr4]

I'm not sure if you can do that. Greg is working on reading only one and having a dummy on the other turbo to keep the restriction the same and just use the value at 50% I think.

[Greg E]

Reading only one intake doesn't work. Turns out the turbos are very unbalanced when it comes to drawing air and trade off the bias in a random fashion.

[Checkered vr4]

Z06 MAF is the next step then. Thank you Greg for the time you spend that saves me from wasting tons of time and effort figuring things like that out on my own!!

[2fnloud]

Using MAFt or MAFtPro?

[Chris@Rvengeperformance]

The only reason we stopped making power is the size of the Evo MAF. You can see it in the HP curve, the line for the 83mm ford MAF keeps climbing to the rev limit. The Evo MAF shows it's restriction by limiting the boost at higher rpms.

The big question now is deciding to go with 2 Evo MAF's or a z06 MAF and translator.

Scott, I really appreciate you testing this. I'm not 100% convinced this is the end of the evo maf. Mellon has pushed up to 790 wheel on one and there are loads of people over 600. I can't think of why an evo could make more power on the same maf than us.

Stupid question, but what size air filter are you running? I'm running one so large you have to squeeze it in to clear the fender apron.

Also, I didn't lay your graphs on the screen at the same time, but it appears just eye balling it the evo maf setup actually spools faster.

Is the arc 83mm maf the internal diameter or external? The external OD of the evo maf is about 3.25", which is 82.55 mm. The internals are obviously more restriction though.

[Checkered vr4]

Scott, I really appreciate you testing this. I'm not 100% convinced this is the end of the evo maf. Mellon has pushed up to 790 wheel on one and there are loads of people over 600. I can't think of why an evo could make more power on the same maf than us.

Stupid question, but what size air filter are you running? I'm running one so large you have to squeeze it in to clear the fender apron.

Also, I didn't lay your graphs on the screen at the same time, but it appears just eye balling it the evo maf setup actually spools faster.

Is the arc 83mm maf the internal diameter or external? The external OD of the evo maf is about 3.25", which is 82.55 mm. The internals are obviously more restriction though.

It's a small air filter. I'll check the actual measurements of the MAF sensors. The car easily held 30+ psi to redline with the ford MAF, the psi with the Evo MAF is shown on this map.

[bluzvr4]

can you run blow thru and just ditch the maf?

[vr4tune]

can you run blow thru and just ditch the maf?

blow thru- still has a maf. The maf is relocated between the turbo and the throttle body under positive pressure during boost.

Speed density- has no maf at all and uses an intake air temp sensor (IAT) and a manifold absolute pressure sensor (MAP) combined to calculate air. Speed density is not supported by chrome and usually used with an AEM EMS.

[Greg E]

Z06 MAF is the next step then. Thank you Greg for the time you spend that saves me from wasting tons of time and effort figuring things like that out on my own!!

Yeah man! I may ask you to help me test some new code in the near future if you're interested. Lets talk about it during NG.