using an ARC 2 with a flashable ECU

[Checkered vr4]

[2fnloud]

Sooooo, Are we going to see a for sale thread on the Clone ECU or the Arc 2?

[Checkered vr4]

Currently trying out an Evo MAF to see if I max out its flow. Probably going to end up selling the ARC 2. Maybe I'll bring it to the NG with a 25 spline mark Williams 5 speed output shaft and some other goodies for quick liquidation.

[bluzvr4]

ill take the clone u can keep the arc

[Greg E]

Set the ARC to stock injector settings. Double the MAF size value. Fine tune using the MAF comp (VE) tables.

[Checkered vr4]

Well . . . Here is how it turned out. I went with a stock Evo MAF and removed the ARC 2. The horsepower came in just under what the piggy-back tune had but with lots more torque.image.jpg

[Checkered vr4]

Here is the dyno results from last year at the STL NG. ARC 2 and stock '93 ECU.

[whitedragon]

Dat torque curve!

[Checkered vr4]

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.

[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.