#Multi tune ls ecu install#
#Multi tune ls ecu mod#

Likewise, the internal fuel rails are integrated into the throttle-body housing. The four annular rings both mimic a carb's boosters in appearance and functionality, as the injectors discharge fuel into them for improved atomization. The die-cast throttle body isn't just a direct bolt-in replacement for a 4150-style carb, it does what's arguably the best impersonation of a double-pumper to date. The ethanol that's blended into gasoline these days made my carb run very poorly, but all that's gone away with the EFI system.'Ī large reason why Atomic EFI looks so good is its purposefully streamlined design. I can let the car sit for weeks, and it will fire right up on the first crank every time. 'The very first time I turned the key after installing the system, it fired up immediately, and the driveability kept getting better and better as I put more miles on the car. The improvement in throttle response and low-end torque is incredible,' he says.

#Multi tune ls ecu mod#

'The EFI system is by far the single best mod I've made to the car. He installed a FAST EZ-EFI system on his '62 Impala-which packs a 427 small-block Chevy that dynos at 550 hp-and has been absolutely ecstatic with how well it has performed over the last two years. That's exactly what happened when we met the stand-in model for this story, Craig Murray. Hang out on cruise night long enough and you'll eventually run into one of them. Without ever laying a finger on a laptop, the motor is ready to fire up, and as the miles pile on, the self-learning ECU automatically tunes itself using feedback from a wideband oxygen sensor.Īn easy-to-install EFI system that tunes itself might sound too good to be true, but there are plenty of satisfied hot rodders in the real world to make us believers. After installing the hardware, the injectors and engine sensors plug into a stand-alone ECU to create a baseline fuel map based on information you enter-such as engine displacement, camshaft specs, and desired idle speed-using a handheld controller. Unlike a multipoint EFI system, there's no need to drill and weld injector bungs into the intake manifold.

#Multi tune ls ecu install#

Since they'll bolt on to any square-bore intake flange, anyone who can swap a carb can install one of these EFI systems. They bolt on in place of a traditional 4150-style carburetor, and include fuel rails, injectors, engine sensors, and a throttle-linkage integrated into the throttle-body assembly. Companies like Edelbrock, FAST, Holley, and MSD are all serious players in this emerging segment, and today's crop of aftermarket throttle-body EFI systems all work on a similar principle.