Throttle Body Spacers - Increase Gas Milage

Theory Page

In the next couple of chapters we are going to explain the theory and
operation of what the throttle body spacer does for your engine. Here we go!
The Throttle Body Spacer Kit installs between the throttle body unit and
the intake manifold. This will first give the intake more cfm of air. This
is just like putting a high raise intake on the old hot rod. The Throttle
body spacer speeds up the incoming air charge in the intake. This in return
gives you tremendous combustion efficiency. More air charge more power.
Provides great torque, 12 to 15 horsepower and with a faster and efficent
combustion burn it will increase your gas mileage by 1 to 2 miles per
gallon. With todays gas prices we need it.
Now lets go into the differance between Chevys TBI Engines 1986-1995,
And Chevys Vortec Engines 1996-2005. The TBI is Throttle Body Injected
engines. The TBI unit has the injectors on it. The mixer of fuel and air
happen right in the intake. This engine works best with a smooth bore
Throttle Body Spacer do to swirls cut in the bottom of the intake and the
balance cross over port in the intake. With a smooth bore spacer you are
making torque tubes out of the intake that really speeds the air up. Helix
bore that we have done and tested makes the engine have a hesitation right
off idle. The other thing I see people doing is putting plastic spacers on
to keep the heat off the TBI Unit. Now thats funny. The Intake manifold
ports to The top of the Intake have water jackets around the incoming air.
The heat helps with the burn of the fuel. that is why todays vehicles run at
210 degrees. Better economy and fuel burn. If you want lots of power take
the temp down to 160 to 180 degrees you will gain some more power but by by
gas mileage. I like alittle more power and an increase in gas mileage. I
want to save my money away from the gas pump.
Now for the Chevy Vortec Engine 1996-2005

The Chevy Vortec engine from 1996-2000 V6 and V8 uses what is know as
center port injection. Another name for it is CPI. The injectors are in the
center of the intake and has injector tubes that go down the intake runner
to spray nozzels pionted down to the intake runner in the head.
This system you can gain more power by spinning the air as it comes into
the intake do to it is open plenuim design and the air and fuel starts to
mix in the head. More air more power.
The 2000 - present injection design went to multiport injection where each
cylinder has an injector right at the end of each intake runner going into
the head. Again more air forced into the intake the better combustion
effeceincy is.
Alot of other manufacture us the multiport injection so the theory is the
same.
Thanks for stopping in. Have a great day.

T&T Motorsports
11800 Sleeman Gulch RD.
Lolo, MT. 59847
1-888-409-9032
Tech line 888-409-9032
Fax: 406-273-7747