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Alan Roehrich · 12-03-2016, 04:18 PM

The TBI engine is no better than the carbureted engine for fuel efficiency or performance, and in fact is often worse. The TBI engine is in fact the exact same engine as the old carbureted engine, except that in most cases it has an adapter and a 650 cfm fuel injection throttle body instead of a 750 cfm Q-Jet.

The Vortec engines are light years ahead.

12-03-2016, 04:18 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,095 Likes: 1,542 Liked 1,772 Times in 402 Posts	Re: 454 TBI mpg The TBI engine is no better than the carbureted engine for fuel efficiency or performance, and in fact is often worse. The TBI engine is in fact the exact same engine as the old carbureted engine, except that in most cases it has an adapter and a 650 cfm fuel injection throttle body instead of a 750 cfm Q-Jet. The Vortec engines are light years ahead. __________________ Alan Roehrich 212A G/S