@davidnunn posted:Even with a sequential system, it should work although you would need to take steps to even out the airflow between the two plenum halves. Some dual plane manifolds have a small notch removed from the divider which would solve the problem. If the DP manifold didn't have that notch, one could be cut out or an open plenum spacer could be used. You just need to ensure that the same amount of air is flowing to all cylinders. An alternative would be to use dual O2 sensors; one per bank. Then you could tune each side of the engine separately.
Sequential firing is only for OEM. It is for emissions reasons because it is cleaner at idle, but you don't need it and in fact is actually detrimental for performance applications.
There are no injectors made that can keep up with a V8 much over 3,000 rpm if sequentially fired.
Batch fired isn't as clean at idle since there is unburned fuel momentarily sitting on the closed intake valve. It is also slightly susceptible to fuel reversion as a result but nothing like carbs create on an IR manifold.
An interesting side effect to EFI is it calms down the idle on radical or marginal cams. In fact, the largest complaint against switching from carbs to efi is that the engine looses much of the rumpy-rump idle the long overlap cam creates.
The horse power is a function of how much atomized air the engine can pump. EFI does not increase that but particularly in eight stacks it distributes it evenly.