Upgrade Sequencing – Stage 4

In Stage 3 we were able to achieve our best numbers at 19-20 psi on pump gas before we hit fuel cut. In order to work our way around the fuel cut issue with the stock ecu and Super AFC2, we installed larger 660cc injectors and a 255 lph fuel pump. Utilizing race fuel, we were able to retune the car for a peak boost of 24psi which would immediately settle to 20-21 psi due to the limitations of the stock turbocharger’s compressor wheel. Although we were still able to increase the peak horsepower (now up to 380.8 whp), the torque increase was substantial to say the least. Previous best torque was 303.9 ft/lbs in Stage 3, but has increased to 349.1 ft/lbs @ 4500 rpm as measured at the wheels!

1/4 MILE PERFORMANCE OF BR EVO VIII WITH BUSCHUR RACING STAGE 4 PKG:

  • 60FT -
  • 1/8 ET-
  • 1/8 MPH-
  • 1/4 ET-
  • 1/4 MPH-

Stage 4 package as tuned with the Buschur Racing Flash Tuned ECU. This dyno chart was produced utilizing race gas and higher boost. Run 70 shows the result of higher peak boost. This run produced higher peak performance, however the heat generated by working the turbo that hard sacrificed some high end output. Run 72 shows a little more conservative tuning and is the run our Stage 4 ECU flash is based on. As with any of our flashes, you can use the SAFCII to fine tune the a/f ratio to your particular needs.

As tested:

  • FUEL – RACEGAS
  • BOOST – 24 PSI PEAK, SETTLING TO 20-21 PSI
  • BOOST CONTROL – BR MANUAL BOOST CONTROL
  • INTERNAL ENGINE MODIFICATIONS – HKS 264 INTAKE AND 264 EXHAUST CAMSHAFTS
  • TURBO MODIFICATIONS – NONE
  • INTERCOOLER – BR FRONT MOUNT INTERCOOLER KIT
  • INTAKE MODIFICATIONS – BR AIR FILTER KIT, BR UPPER I/C PIPE KIT, BR MAF PIPE KIT, BR BATTERY KIT
  • EXHAUST MODIFICATIONS – BR 3″ FULL EXHAUST
  • CATALYTIC CONVERTER – NONE
  • ECU MODIFICATIONS – CUSTOM ECU FLASH
  • FUEL TUNING MODIFICATIONS – CUSTOM ECU FLASH
  • FUEL DELIVERY MODIFICATIONS – 255LPH FUEL PUMP, 660CC INJECTORS

Stage 4 Package Price: $439.00
Installation cost at Buschur Racing: $150.00

  • BR EVO 8 STG 4 INJECTOR/PUMP PACKAGE
  • Your choice of 680, 780 or 880cc fuel injectors. 1000cc please add $15.

Ready to take it to the next level? Stage 5 is next!