Two barrel TBI must have a flaw, I give up.

[Len Sabatine]

At 03:24 PM 6/1/00 -0400, you wrote:
>At 07:44 AM 6/1/00 -0400, you wrote:
> >
> >Those numbers sound about right. Remember that they are 2-bbl numbers
> >at 3"hg, 4bbl's are rated at 1.5" hg.
> >>Not being able to look at the car, this can be tough. There are so many
> >little things that can get ya'. Like, are the throttle blades all the 
> way open
> >when the go pedal is down? Do you have the 'air-directors' on the
> >tbi? How high off the manifold is the tbi?
> >Im pretty sure the throttle blades are opening up all the way, now the "air
>directors"  I dont know about, I probably call them those ----- thingies.
>The TBI is off the manifold mounting flange about 3/8 (because of the adapter)
>Played with the fuel some more tonight, held everything constant except for
>bpw as per a members reccomendation, i could get it really rich on the top
>but the power was just not there i mean it took a year to rev from 4000 to
>5000 and the sound the engine was making was not pretty
>
>Pablo
>   I know this is going to get some folks hair standin up , anyway, single 
> plane intake manifolds , especially
the unit you're using ,tend to have a violent plenum that can disrupt fuel 
metering. A dual plane Intake would
offer a needed cushion and smooth the back flow pulses plus broaden the 
torque curve. We have not been
able to achieve satisfactory results with a single plane intake manifold 
with a combination similar to yours.
Placing the  2v TBI favoring the primary side of the plenum  is helpful. 
Lots of combos can be made to work,
however , some combinations make one chase tail more than others to arrive 
at the same end result. A dual
plane intake would also be less sensitive to the small  Flow capacity 
Stock  TBI as well.

Len

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