LS1 WalkaroundThe MSD MEFI4 is plug-and-play if you want it to be. To get the car on the road, all you have to do is plug in all the connectors, add power and a ground, and load a base fuel and timing map by clicking a button. We've provided this spread to help you identify the locations and functions of all the sensors on the LS1 engine.LS1 Walkaround The MSD MEFI4 is plug-and-play if you want it to be. To get the car on the If you have a black connector, your crank trigger is 24x. If the connector is gray, it is a 58x.If you have a black connector, your crank trigger is 24x. If the connector is gray, it is We used the MSD MEFI4 engine controller instead of finding and modifying an original harness. The system plugs in to the factory sensors and includes injector and coil harnesses. The basic wiring requires two constant 12-volt connections, a ground, and a 12-volt key-on connection.We used the MSD MEFI4 engine controller instead of finding and modifying an original harne The temperature sender is plugged in to the driver-side head. The MEFI4 uses that input to activate two outputs: the engine cooling fan, and in our case, the transmission cooling fan as well.The temperature sender is plugged in to the driver-side head. The MEFI4 uses that input to If you have two fuel inlet lines on the manifold, you also have an external fuel regulator. If you have a single fuel inlet line, the regulator is in the tank and you have a fuel damper like this one. Because of our single fuel line, we used an in-tank regulated LS1 pump.If you have two fuel inlet lines on the manifold, you also have an external fuel regulator On the left is the oil pressure sender, and on the right is the cam sensor. The factory engine uses the crank and cam sensor to operate the sequential fuel-injection system and fire one injector at a time. The MEFI4 is batch fire, meaning all the injectors fire at the same time. The new MEFI5 system will use these two sensors to operate in sequential mode.On the left is the oil pressure sender, and on the right is the cam sensor. The factory en The manifold absolute pressure (MAP) sensor is also behind the intake manifold. It is used to fine-tune the fuel maps.The manifold absolute pressure (MAP) sensor is also behind the intake manifold. It is used The knock sensor plugs in behind the intake manifold and sends a signal to the MEFI4 to control spark timing. The trick here is to run good gas and shut it off at the dragstrip.The knock sensor plugs in behind the intake manifold and sends a signal to the MEFI4 to co The stock GTO exhaust manifolds will not fit. The headers we used are from Street and Performance in Mena, Arkansas. They fit over the bump for the starter on the transmission and clear the steering shaft. S&P offers LS1 swap headers for G-bodies, Camaros, and Tri-Five Chevys as well.The stock GTO exhaust manifolds will not fit. The headers we used are from Street and Perf « | 1 | 2 | 3 | » | View Full Article Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!
