shatty wrote:
Aside from the so called 36 extra HP I would get from the AEM CAI, what kind of power increase would I get from the Stage 1 map? Cause I am under the assumption that the Stage 2 requies an aftermarket turbo and exauhst. I am keeping my stock turbo and exausht. Stage 1 requires fuel pump and AEM. Correct?
The XPT Stage 2 map does require a Turbo IHI VF52 Turbo Upgrade and a Turbo Back Exhaust (TBE) install [*along with all the same stuff needed for the Stage 1 map].
Typically you will not see that big of a hp increase from using a Cold Air Intake (CAI) over a stock Air Box with K& N Filter, however if you live in a warm state it will defiantly help with your turbo intake temps which will help you gain a few hp as the end result. The drawback to most CAI is that they need to be tuned to perform at their best. It just so happens that we wrote the Stage 1 and the Stage 2 maps tuned with a AEM CAI system equipped. This maximizes the airflow and the overall hp and performance of these map upgrades. And yes it does add hp to the overall tune.
If you decide to just get the Stage 1 Map this is all you need:
-Stock Airbox with K&N Part # 33-2304 or
-AEM Cold Air Intake Part #21-478WR
-Walbro 255lph Fuel Pump Part # GSS342 (REQUIRED!!!)
*Everything else can remain as it is.
Stage 1 maps are more about throttle response and over driveability. Some customers report hp gains on the dyno from our Stage 1 maps, but I would think of a Stage 1 map more as adding a little boost and better spool to your stock turbo than adding any great hp to your car. It is a very nice upgrade and I highly recommend doing a Stage 1 map before putting all the work into setting up a Stage 2 WRX.
Hope this answers some of your questions.
