Carburetion Question?

TBI = Throttle Body Injection Vortec = is an advertising term they came up with for the newer engines, it basically means nothing.

Doesn't Vortec imply EFI instead of TBI?

Ronald Bean wrote in alt.autos.gm

Vortec is a term that GM is using for some intake technology, seems to be mostly an advertising slogan. TBI means Throttle Body Injection, which simply means that the gas is injected into the throttle body, which is a single point injection system, as opposed to the MPI or Multi Port Injection. MPI has the injectors just before the intake valves. Some one asked about EFI, EFI is Electronic Fuel Injection, which means that the injectors are controlled electronically instead of mechanically. And almost all cars have electronic controlled injectors. And one additional item. A carburator is device with a bowl to hold fuel, connected to a tube leading to the intake of an engine, like a throttle body. As the air passes through the tube it sucks the gas out of the bowl. You were asking questions about fuel injectors, which take the place of the carburators on engines. So your question was not about carburation, rather it was about fuel injectors.

Thanks

you couldn't be more completely wrong.

TBI injection replaces the carb with a throttle body w/ injectors mounted above the throttle blades. they also have some of the worst heads GM ever produced in an overzealous attempt at acheiving low end torque by using runners that are too long and too narrow.

Vortec is a completely different fuel injection system that uses 8 injectors mounted after the throttle body instead of the TBI system's

2 injectors before the TB. the vortec engines also use the LT1 port design to achieve one of the best heads you can buy for a SB chevy.

a Vortec 5700 has 45 more HP than a TBI 350.

-Bret