First thing people will notice is they are cast iron, while being heavy they are also very stout and durable. While being arguably the best heads to ever come out of GM, they do have their drawbacks. These heads can support over 400HP out of the box and can pull up to 6000RPM. Featuring 1.94/.150 valves typical of GM, and a smaller combustion chamber of 64cc. With similar runner and combustion chambers, but that is where the similarities stop. The ever-popular Vortec heads are based off the second-GEN LT-series of engines. The famous Vortec heads are also found on this series of engine. They showed numbers 15~20 higher than GM's. GMPP did extensive testing on this engine as it's the foundation of their popular Ram Jet engines. Power numbers jumped around from GM's claim of 220HP / 330lb-tq. Sporting a modest compression of 9.1:1 and very street friendly. This engine was replaced in favour of the more powerful and efficient LS-series of engines. The Vortec 元1 engine is a "traditional" 5.7 and can be found in almost every fullsize truck from '96 to 2000 and the big Express vans from '96 to '03. So I figured I would write up this thread to consolidate information.
With most threads asking the same questions over-and-over about wiring, performance, interchangeability, and general swap specifics. And I've seen lots of threads aimed at the Vortec 5.7 swap. I've been hanging out on this section of the forum for that past year or so.
0 kommentar(er)
