We have about 170 VEC1's on Vipers now and a lot of people who don't have them are not sure how it works or what it does. Here is the improved description from our website at http://www.roeracing.com/index.html?token=119008792-1096937056-1828834807&A=24&B=Viper%20Engine%20Calibrator .
Please feel free to ask any questions. There is no need to think of it as a mysterious "black box".
The VEC1 Viper Engine Calibrator provides adjustment of the air/fuel ratio and ignition timing over the entire operating range of the engine. The adjustments can be made by the driver "on the fly" to optimize engine tuning. Adjustments are generally not needed after the initial setup. It is especially useful for recalibration of stock Vipers and those with modified engines, intake or exhaust systems. As you upgrade your engine, you can continue to tune it for optimum power.
Powertrain Control Modules (PCM's) are preprogrammed to run an engine at a specific air/fuel ratio and timing advance based on the load the engine is under. With the calibrator, you can alter the load calibration the PCM is using to increase power and throttle response.
At low, part throttle loads, a stock Viper PCM typically runs the engine at 45 degrees timing advance and a very lean mixture. By altering the load calibration of the PCM to a positive setting, we can give the engine more fuel and reduce the excessive spark advance. This yeilds noticeably improved part throttle torque and throttle response over the stock calibration.
At full throttle, heavy loads, the stock Viper PCM typically runs the engine at 18 degrees timing advance and an excessively rich fuel mixture of 11.0:1. By adjusting the load calibration of the PCM to a negative setting, we can increase the spark advance to 30 degrees and reduce the excessive fuel mixture for dramatically improved full throttle power. The engine will pull harder at higher RPM's because of the increased spark advance and proper air/fuel mixture. Additionally, an increase in fuel economy is generally noted by all users after the calibrator has been installed and tuned in.
Calibrator Features:
- Low load calibration
- High load calibration
- Output clamp (assures output is kept within PCM parameters so no codes are set)
- Filter to provide smooth idle and reduce noise
- Transient surge and battery reversal protection
The air/fuel ratio gauge included in the kit is a precision, miniature instrument that provides an easy to read, real time display of the air/fuel ratio. The gauge has a 10 segment, 5 color LED display. The use of color makes the gauge readable with peripheral vision. It is calibrated for a 1V full scale input range and a sensitivity of .1V per display segment. The air/fuel ratio gauge gets it's signal from the upstream oxygen sensors, which is important, because monitoring the air/fuel ratio reading after the catalytic converters (which burn off excess fuel) will indicate an erroneous leaner reading.
Air/fuel Ratio Gauge Features:
- 5 color display is easily read
- Dimming feature automatically reduces display brightness at night
- Signal filtering enhances readability of the display
- High input impedance does not effect operation of the exhaust oxygen sensor
- Battery reversal protection
All components for installation are included along with a full color installation and tuning guide. No drilling or special tools required! Compatible with all PCM's, though the largest gains in power and throttle response will be when used with a stock PCM. Most Vipers pickup a peak of 14 HP and 16 Ft. Lbs of torque at the rear wheels across the entire RPM range at full throttle with greater gains at part throttle. 6 month warranty. 30 day money back satisfaction guarantee.
Please feel free to ask any questions. There is no need to think of it as a mysterious "black box".
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The VEC1 Viper Engine Calibrator provides adjustment of the air/fuel ratio and ignition timing over the entire operating range of the engine. The adjustments can be made by the driver "on the fly" to optimize engine tuning. Adjustments are generally not needed after the initial setup. It is especially useful for recalibration of stock Vipers and those with modified engines, intake or exhaust systems. As you upgrade your engine, you can continue to tune it for optimum power.
Powertrain Control Modules (PCM's) are preprogrammed to run an engine at a specific air/fuel ratio and timing advance based on the load the engine is under. With the calibrator, you can alter the load calibration the PCM is using to increase power and throttle response.
At low, part throttle loads, a stock Viper PCM typically runs the engine at 45 degrees timing advance and a very lean mixture. By altering the load calibration of the PCM to a positive setting, we can give the engine more fuel and reduce the excessive spark advance. This yeilds noticeably improved part throttle torque and throttle response over the stock calibration.
At full throttle, heavy loads, the stock Viper PCM typically runs the engine at 18 degrees timing advance and an excessively rich fuel mixture of 11.0:1. By adjusting the load calibration of the PCM to a negative setting, we can increase the spark advance to 30 degrees and reduce the excessive fuel mixture for dramatically improved full throttle power. The engine will pull harder at higher RPM's because of the increased spark advance and proper air/fuel mixture. Additionally, an increase in fuel economy is generally noted by all users after the calibrator has been installed and tuned in.
Calibrator Features:
- Low load calibration
- High load calibration
- Output clamp (assures output is kept within PCM parameters so no codes are set)
- Filter to provide smooth idle and reduce noise
- Transient surge and battery reversal protection
The air/fuel ratio gauge included in the kit is a precision, miniature instrument that provides an easy to read, real time display of the air/fuel ratio. The gauge has a 10 segment, 5 color LED display. The use of color makes the gauge readable with peripheral vision. It is calibrated for a 1V full scale input range and a sensitivity of .1V per display segment. The air/fuel ratio gauge gets it's signal from the upstream oxygen sensors, which is important, because monitoring the air/fuel ratio reading after the catalytic converters (which burn off excess fuel) will indicate an erroneous leaner reading.
Air/fuel Ratio Gauge Features:
- 5 color display is easily read
- Dimming feature automatically reduces display brightness at night
- Signal filtering enhances readability of the display
- High input impedance does not effect operation of the exhaust oxygen sensor
- Battery reversal protection
All components for installation are included along with a full color installation and tuning guide. No drilling or special tools required! Compatible with all PCM's, though the largest gains in power and throttle response will be when used with a stock PCM. Most Vipers pickup a peak of 14 HP and 16 Ft. Lbs of torque at the rear wheels across the entire RPM range at full throttle with greater gains at part throttle. 6 month warranty. 30 day money back satisfaction guarantee.
