In article <016801c3d3a7$8c4a8900$d75f2241@a.tampabay.rr.com>,
acellan1@tampabay.rr.com ("Tony Cellana") writes:
>
>
> Some miscellaneous ramblings on the topic:
>
> Not knocking anyone's product or thoughts, just tossing mine into the mix.
>
> TBs are a controlled hole in the intake manifold that will allow a certain
> amount of air into the motor. Some motors need more air than others. The
> amount depends on CID, RPM, and the tuning characteristics of the intake
> manifold, cam and valvetrain.
It is fairly easy to determine if you need a bigger TB. If you have (more than
approximately 1/2" H2O) vacuum in the intake manifold at WOT then you have a
restriction and a bigger TB is warranted.
> Some motors want more air than others. TOO much air isn't always a good
> thing though. It can cause bogging, off idle hesitation and/or stumble.
> This is often seen when abruptly opening the throttle from idle or near idle
> (think jumping off alight or drag racing).
The bog, hesitation and/or stumble is a carb characteristic. This does not
happen with a port injected engine with a dry TB. When a carb is too big you
loose too much air velocity as you open the throttle if it's too big resulting
in a loss of vacuum that is needed to pull fuel from the bowls. This is a non
issue with port injection. If you were so inclined you could take the TB off
the engine and use your hand to control rpm.
Dave Clement
99 SLT+ CC 4x4
This archive was generated by hypermail 2b29 : Sun Feb 01 2004 - 16:29:49 EST