ryan91rs

i read somewhere some one was going to try a dual TBI setup on a 383 b/c the TBI does not flow past 650 or something. Does that need to be done b/c of flow and if so does anyone have a picture and how they set it up? maybe a dual carb manifold with adapters?

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"I'm just trying to go through life without looking stupid"
"Anything worth doing is hard"

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rocko350

im using 2 small block tbis on a heavilly moded 2 4bbl dual planr with 4 90#ers. im mainly doing it for fuel flow at 6500 so the manifold can recover when it upshifts and drops to 3500. absolutely no street running for me.

ryan91rs

so it is not really a streetable setup by it's nature or by design? can i dual tbi be done and i just found a BB TBI that says it flows 850 CFM. I guess the real question is this: a 383 meant for low rpm torque (what i want) and respectable MPG needs how much flow. I figure make the power low so i do not need to rev it up where the TBI falls on it's face.

i know there are tons of variables but how much CFM is needed on a "sleeper" street car attmpting 400 horse area with even more torque? If it is more than lets say 850cfm then a dual tbi will be a must correct?

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"I'm just trying to go through life without looking stupid"
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Fast355

I'll put it this way, I feed a 450+ HP 350 to 7,000 rpm with a 454 TBI unit on a single plane 2bbl manifold.

ryan91rs

oh okay thats what i needed to know. thanks!

drefi

Can you show us the engine specs & dyno sheets?