Airboy tuning
5720 1st SW T2H 0E2 Calgary, AB, Canada

Another example of (2011) STi with upgraded fuel pump (in OEM pump holder/basket) losing fuel pressure at high RPM. At 20psi fuel pressure started to roll off and as RPM climbs, the pressure drops more rapidly. With the fuel pressure sensor wired in, the ECU was able to "see" this happening and try to compensate by increasing the injector pulsewidth. I use "try" because the compenstion will only work until the fuel flow (L/hr) reaches its limit. The flow limit depends on how bad the leak is inside the fuel pump holder. The compensation is meant to serve as early warning rather then a "fix". This highlights the important role that the pump basket plays in the fuel system. It is more than just adding fuel pump and injectors when it comes to adding fuel capacity.

In a few days, my 2006 WRX will be 14 years old. Still ticking after roughly 275,000km and 5 turbo swaps. It has taken me North to Fort Simpson (NWT) and South to Flagstaff (AZ). What is the longest that you have kept a car, and do you still have it?

Pre-purchase suggestion: In addition to the usual inspection for fluid leaks, cylinder compression and leak-down, etc, if the seller mentions that the car was tuned at a particular shop, request supporting documentation. This could be a print out of the dyno chart or invoice. If the hard copies are lost, have the seller contact the shop and obtain replacements.

Borg Warner, I am disappoint.

Hmm that is not a Japanese import. The "shop car" from #vexperformance (2013 ML63 AMG) getting some custom tuning done. Stock other than drop-in filters.

Finally had some time to put my 06 WRX (273,000km) back on the dyno. Gen II GTX28, ID1050x, Flex Fuel (E74), Aquamist Meth injection (installed around 2009) #vex #vexperformance #aquamist