In the main menu the user...
In the main menu the user can choose between channel A or B for two different boost settings.
Monitor Mode
The A'PEXi AVC Type-R offers a clever monitoring mode that is often non-existent in other electronic boost controllers. The AVC Type-R monitor mode allows up to four channels to be previewed at one time in three different ways-Numerical, Digital Analog-style Meter and Graph display. The AVC Type-R unit can monitor intake manifold vacuum/boost pressure, engine speed (RPM), vehicle speed, throttle position, solenoid valve duty cycle and injector duty cycle. In both the numeric and digital analog-style meter mode the user can see a peak/hold value for the chosen parameter. The graphic display mode allows the user to record or "sample" data channels. The recorded data can then be replayed and reviewed by the user for crucial tuning information. If only one channel was being viewed up to 60 seconds can be sampled. Two channels offers 30 seconds of recorded play, three channels last 20 seconds and four channels last only 15 seconds.
Besides the monitoring mode in numeric, digital analog-style meter and graph display, the AVC Type-R unit can also monitor in a 2D-trace mode. Up to five parameters can be monitored, but only one at a time-boost, vehicle speed, throttle position, solenoid duty and injector duty. The 2D-trace mode allows one tuner-selected parameter to view versus engine rpm. In the 2D-trace mode there are three ways to view the 2D trace. One way is a simple cursor, second a 10 point floating trail and the third being a "Ghost Map" trace. The Ghost Map shows wherever the cursor has been and does not disappear until the tuner clears the screen.
Dyno Proven
As you may have already noticed our February 2000 issue is dominated by Supras and we felt it was only fitting to dyno test the new A'PEXi AVC Type-R and Super AFC on a twin-turbo Supra. Our tester vehicle is a moderately modified 1996 automatic twin-turbo Supra equipped with an A'PEXi N1 exhaust, K&N air filter element and HKS Fuel Cut Defenser (FCD). With the addition of the air filter and exhaust system still incorporating the factory catalytics the Toyota's power output was raised to 295.1 horsepower and 280.4 lbs-ft of torque. This figure will be used as our baseline. The AVC Type-R comes with all the necessary hardware and instructions for a straightforward installation. Only a qualified technician should install the Super AFC and AVC Type-R. Improper installation of the units can lead to possible electronic problems and engine failure. First to be adjusted on the Supra was the AVC Type-R unit; the factory boost pressure of 0.9 bar (13.23 psi) was raised to 1.1 bar (16.17 psi). With the help of a Motec air/fuel meter the fuel curve was fine-tuned with the A'PEXi Super AFC for optimum reliability and horsepower. The power duo enabled the Supra to pound the rollers of the Dynojet to a tune of 334.6 horsepower and 335.6 lbs-ft of torque. The Toyota made the largest improvement at 4900 rpm where horsepower jumped up by 54.1 and torque figures escalated to 58.3 lbs-ft. It should be noted that most of the power gains were realized from fine tuning the fuel curve. Nearly 30 horsepower and 30 lbs-ft torque were realized from just tuning the air/fuel mixture.
When it comes to modifying your vehicle everyone is looking for the best bang for the buck. If you are going to spend a $1000 dollars you would expect some noticeable performance gains to by realize. There are not many performance products in the market the offers the kind of horsepower gains per dollar spent like the A'PEXi power duo. The A'PEXi units offer amazing tuneability and monitoring capabilities all in one compact package. With the addition of the A'PEXi Super AFC and AVC Type-R you get added performance and reliability without burning a hole in your bank account.