5 Things to Know About Carbureted LS Motors | Ls1tech 5 Things to Know About Carbureted LS Motors For cars that originally came equipped with an LS engine, it would be hard to justify ripping out the EFI system to replace it with an old-school carburetor; however, those that will be performing an LS engine swap into a race car or classic street car may find a carburetor conversion to be a viable alternative to using fuel injection and purchasing