The intake manifold is what hurts like hell on this car, and the FI manifold is horrible too. Maybe worse than the carb intake. The fuel mixture to the motor is decent as running, I am not saying it is perfect, but we're not going to see a 10 rwhp jump at peak or throughout the curve with FI. The intakes really are bad, and before you say "nah, I'm sure they are not that bad", get one in your hands and have a look. You'll know.
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Yeah your right at 15:1 your not gonna gain anything....clearly the flow of the heads and intake can take more air than fuel. That great big ECU box those old L-jet systems had could take a complete Motec in its own case inside. [attachmentid=328][attachmentid=329]

I guess looking at the two different parts there is no advantage to haveing more port space and direct control over putting fuel right behind the intake valve..