Quick skinny, I have an early batch of the vishnu unichip w/ stage 1 maps and:

Underdrive pulley,
MBC
Leaky vishnu up pipe (yes!)
HKS downpipe
GReddy EVO cat back
Intake silencer removal

As I understand it, piggybacks will constantly battle with the stock ECU, and a reflash (ala ecutek/accessport/etc) is the only _real_ solution.

According to Vishnu I'm making 300-310:

http://www.vishnutuning.com/images/stage1/stage_1.jpg

and yet w/ the stage 2 cobb setup I will be only making 285:

http://cobbtuning.com/wrx/images/ae-stage2-dyno.jpg

Is this inaccurate? Will I actually notice gains going from a unichip to this setup? What happens when I start stacking more mods on, doesn't seem like COBB offers too many different variations (FMIC, injectors, turbo, etc).

w00t for the trunk monkey.

I really don't know about Unichips, but I do have the Cobb AP stage 2. Which is what you are at with your mods, minus the MBC. I am very happy with mine so far, and I have not even installed my gutted UP yet.

The Accessport may not offer many options right now, but they will almost certainly be adding more in the future (hopefully near future), and once the accesstuner comes out custom setups will not be a problem.

You're trying to compare numbers from two different types of dynos. You really can't do this with any sort of accuracy. Even if you try to derive the crank HP from both dynos, your results won't be very accurate. This is mainly because there is no real multiplier to go from whp to crank hp. Instead its more of a sliding scale with power output. A reflashed ECU will give you more gains than the unichip along with better drivability and consistency. The unichip simply doesn't have nearly as much control over everything as the factory ECU.

-- Ed

Great, many thanks for the great feedback guys..

If anyone else wants to chime in, please do :D

:banana: