SpecRacer Enterprises & CSR News
ECU Status – The issues with the ECU seems to be resolved and upgraded ECU’s are shipping. PE has a new Mother Board coating that has tested very well and seems to have solved the fault issues. AccelRaceTek will have spare ECU’s at the track if one fails.
New Seat Option - SCCA-E has developed a new seat option that will allow drivers to use expanding foam or a bead insert. The seat frame is similar to the fiberglass stock seat but has a larger seating volume to accept the custom foam insert. Bead Seat is making progress with final specs in production. SCCA-E are making prototype for final testing in January.
New Kevlar Sprung Hub Clutch Disc - The new SRF3 Kevlar Sprung Hub Clutch Disc is in production with the first 100 units on order. Look for a 1st quarter introduction.
New Brakes – The new Willwood brakes are in full production and are currently shipping on new cars. The brakes will not be available until after the January races in California and Florida.
Fuel Injector Calibration
Winter and the off season is a great time to check the fuel injectors in the SpecRacer or on any car. If the fuel injectors do not inject the same amount of fuel into each cylinder the engine will not deliver maximum horsepower or in extreme cases the engine can be damaged. When one or multiple injectors do not deliver as much fuel as the others all cylinders will not have the optimum stoichiometric mixture. The engines computer adjusts the fuel mixture based on all of the cylinders and if some are running rich then others are running lean. It is important to have all the fuel injectors matched to be sure that all the cylinders are running at peak power. If one injector has significantly less flow that the others, a lean mixture, pre-ignition can result and that can lead to a damaged engine.
Pull the Injectors – Disconnect the fuel lines from the fuel rail and cap the lines with blank caps. Disconnect the connectors leading to the injectors and then remove the fuel rail. After removing the fuel rail, remove the injectors from the rail.
Send off The Injectors – Bag and pack them for shipping. Send the injectors to your shop or AccelRaceTek to have them cleaned and calibrated.
Cleaning and Calibration Process
This section outlines the cleaning and calibration process for those that are interested.
- Pre-Cleaning Flow Measurements – The injectors are put on the flow test system to check the flow prior to cleaning. This will give a baseline of how the injectors are performing prior to cleaning. The injectors are attached to a manifold and tests leads are connected. The injectors are pressurized to racing pressures and pulses of electricity are sent to the injectors simulating typical racing conditions. The flow out of the injectors is directed into graduated cylinders.
- Pre-Cleaning Flow Analysis – The volume generated from each injector is recorded. In a racing engine it is important that the volumes are within a few percent. The closer the better.
- Spray Pattern – After the volume test, the injector spray patterns are visually inspected to be sure they spay and even pattern.
- Injector Cleaning – After the pre-cleaning testing is complete the injectors go through a thorough cleaning process. The injectors are then place in an ultrasonic cleaner and connected to injector drivers. They are submerged in cleaning solution and pulsed while being cleaned with ultrasonic energy. The combination of the solution and the ultrasound clean the internal and external parts of the injectors.
- Post-Cleaning Flow Testing – The injectors are put back on the flow test system to check the flow. The flow volumes and spray patterns are measured. If any of the injectors does not past they are re-cleaned or replaced with ones that have matching flow rates.
- Test Report – The pre-cleaning and post-cleaning, flow data is recorded in a report that is sent back with the injectors.
Injectors Assembly – Install the injectors back into the fuel rail. Install the fuel rail and injectors back into the head and connect the electrical connections. Install the fuel supply and return lines.Run-In – Turn on the ignition and check for fuel leaks before starting the motor. If there are no leaks start the motor. It is a good idea to check to be sure there are not any air leaks at any of the injectors. Leaks can be found by spraying starting fluid at each of the injectors and if there is an air leak at the interface between the injector and head the engine idle will increase just after spraying and will go back to normal a few seconds after spraying. If there are no fuel or air leaks you are ready to race.