EFI retrofits are pretty common nowadays.
But do you know what isn’t?
Swapping out your carburetor for a set of velocity stacks and eight 50mm Weber IDA-style CNC-machined aluminum throttle bodies.
Each throttle body houses a fuel injector to create a multi-point EFI setup that delivers superior idle characteristics and throttle response. The kit comes with fuel rails that feature a built-in fuel pressure regulator, but Speedmaster doesn’t include the injectors with its manifolds—so you can pick the injector size that best fits your performance goals.
You’ll also get a linkage set that incorporates the throttle stops, idle controls, lever arms, and joiner/balancer in one unit. It’s got a single screw adjuster that lets you calibrate front-to-rear throttle shafts. The bell crank has a fully indexable eccentric cable pulley for good low-speed drivability while maintaining full throttle geometry.
The best news is that Speedmaster makes these systems for a whole bunch of engine applications. Check them all out below:
- GM LS
- Gen 1 Small Block Chevy
- Ford 390-428 FE
- Ford 289-302
- Ford 351W
- Ford 351C/Boss 302
- Ford 460
- Mopar 6.1L Gen III Hemi