Easily installed on most motorcycles, ATVs and UTVs the SAFR provides a simple analog gauge with a wideband O2 system that displays the vehicle's air / fuel ratio (AFR) values and allows riders to fully understand how their vehicle is running. The SAFR is a diagnostic tool which ensures the vehicle is running at optimum levels on the street or in the dirt. It is not intended to be a permanent installation. The unit is fully compatible with all vehicles.
The SAFR (Standalone Air/Fuel Ratio) tool was developed to address the need to quickly understand the state of tune on a vehicle without the hassle of welding in an O2 bung or splicing in wires to power the system. Easily installed on most motorcycles, ATVs and UTVs, the SAFR provides a simple analog gauge with a wideband O2 system that displays the vehicle's air/fuel ratio (AFR) values. The AFR readings allow a user to make sure a vehicle is running at optimum levels on the street or in the dirt. The SAFR is not intended to be a permanent installation. The unit is fully compatible with all vehicles. The SAFR works on carbureted or fuel injected vehicles. The diagnostic tool also works on 2 stroke or 4 stroke engines.
- NO WELDING REQUIRED
- PLUG AND PLAY POWER
- RENT OR PURCHASE
- ANALOG NEEDLE DISPLAY
- WIDEBAND O2 SYSTEM
- NO FREE AIR CALIBRATION
- TEMPORARY INSTALLATION
- COMPATIBLE FOR ALL FUEL TYPES
- 1-YEAR WARRANTY
Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. It is the ratio between the mass of air and the mass of fuel in the air-fuel mix at any given moment.
Oxygen (O2) Sensor - Is an electronic device that measures the proportion of oxygen (O2) in the exhaust gas.
AFR Values & Characteristics in Four Stroke Engines
6.0 AFR - Rich Burn Limit (engine fully warm)
9.0 AFR - Black Smoke / Low Power
11.5 AFR - Best Rich Torque at Wide Open Throttle
12.2 AFR - Safe Best Power at Wide Open Throttle
13.3 AFR - Lean Best Torque
14.6 AFR - Stoichiometric AFR (Stoich)
15.5 AFR - Lean Cruise
16.5 AFR - Usual Best Economy
18.0 AFR - Carbureted Lean Burn Limit
22.0+ AFR - EEC / EFI Lean Burn Limit
Lean Conditions - Common Side Affects
Hotter Engine Temperatures
Detonation / Pinging
Hesitation in Throttle Response
Rich Conditions - Common Side Affects
Decel Pop / Backfiring
Lethargic Throttle Response
Excess Carbon Build-up (sooty pipes)
Fuel Smell from the Exhaust
Due to emission regulations the use of O2 sensors has become prevalent in the powersports industry on OEM vehicles. The concept of implementing an auto-tune / closed loop / self mapping fuel control system has also become prevalent in the after-market tuning industry. A huge misunderstanding results from the type of O2 sensors which can be used in each application. The AFR+ system uses a wideband O2 sensor to display the full range of AFR values and target performance AFR values along with fuel economy AFR values.
A Narrowband O2 Sensor is only calibrated to know whether the current AFR is rich, lean, or stoich. The sensor targets a NARROW range around the stoich AFR value of 14.6 to help stock ECU systems fuel trim to meet emission standards.
A Wideband O2 Sensor is much more sophisticated and can supply the exact AFR measurement across a WIDE range of possible AFR values.
1 x DP Mini-Wideband Assembly - 52 inches
1 x DP Mini-Wideband 4 ft extension harness
1 x DP SAFR AFR Gauge
1 x DP O2 Chamber
1 x DP 39 in Extension Cable
1 x DP Exhaust Probe
1 x Bosch O2 Sensor
1 x Gauge Mount
1 x Nutsert Tool
1 x SAFR Hardware Pack (5 x Nutserts, Washers, Cap Screws)
1 x 25/64" Steel Drill Bit
1 x Cigarette Lighter Power-Up Harness
1 x Battery Tender Power-Up Harness
1 x 12V Battery Direct Power-Up Harness
1 x Power-Up 48" Extension Harness