Massive power gains without increasing the boost?! Read on…

Massive power gains without increasing the boost?! Read on…
The Atomic Boost Controller was tested on an MY02 Subaru WRX (whose only mods were a turbo-back exhaust) back-to-back with the factory controller. A base-line power run was performed with the factory boost control, and the boost level was measured at the same time.
The Atomic was then installed and set to the same peak boost level of 0.9bar (13.2 psi) so that the spool-up time could be accurately compared before and after the installation.

The dyno graph shows the Atomic boost curve in green, and the factory curve in blue. 4th gear is used for both tests, and proof that the Atomic was set to the same peak level is seen towards the end of the chart as the two curves meet. However, notice the massive gains down low in the rev range, as much as 18kW (23.4hp) AT THE WHEELS!

This increase in power shows that the Atomic allows the boost to rise significantly earlier than the factory controller, which on the road represents much better acceleration from a whopping 1700RPM earlier in the rev range. All this WITHOUT exceeding the factory peak boost level!

It is important to note that the MY01-02 (MY02-03 in the US) model responds very well to this modification, because the factory boost mapping is very conservative in an attempt to keep the torque curve flat and the power delivery linear (which totally kills the feeling that you are driving a turbo!).
So, if you want your MY01-02 WRX to REALLY feel lively, fit an Atomic or Reactor boost controller for the best “bang-for-your-buck” modification you can make!
GFB's new Honda pulley… on the dyno
The new light-weight crank pulley for the Honda B16A was tested on a VTEC Civic, showing gains throughout the entire rev range, for a peak gain of 4.7hp at the wheels. It is important to note that the dyno does not show the full potential of the pulley; the gains measured relate mainly to the underdrive effect which slows the engine accessories and reclaims lost power.

The second effect of lightening the pulley helps the engine to accelerate faster, as its inertia is reduced. This does not show up very well on a dyno because the RPM is only brought up slowly, compared to real-life driving. The faster the RPM increases, the more effect the lighter pulley will have (i.e. if the RPM is not changing, reducing the pulley weight will not show any gain at all). So the lighter weight is felt as a throttle response improvement, as the engine feels more willing to rev, which does not show up on the dyno.