How much is too much dual quad

318willrun said

But it was more than the coolness factor.... that is why the 6 pak was rated at more horsepower.

I'll never understand people saying "too much cfm's forces too much into an engine. Especially on vacuum secondaries. That is such a myth and old early 70's talk it's just funny. Cylinders are like syringes. They syphon only so much. Tune to match the air going into the cylinders and let 'er rip! I pulled a 600 off my stock 360 with 2.45's (and at that time no headers) and went to a 770. Guess what? E.T. dropped at the strip.

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Well there IS trial and error, but the idea that a carb "only flows what it needs" can ALSO get you into trouble. The big big problem with oversize carbs is that they don't generate enough AIR VELOCITY to properly operate. This is a situation that does NOT happen with EFI. With a properly tuned / tunable EFI you can put a bucketload of throttle body on the thing and the worst pretty much happens is that throttle pedal "feel" gets "too fast" in other words barely touch the throttle, and "a lot" happens.