What 12A/13B un-blown intake system makes the very most HP? Holley / Weber / FI ? Driveabilty / fuel mileage is not a factor, just pure top- in HP. Top speed is the ONLY thing I'm interested in. Thanks.

 

You can't beat a good efi with a standalone. If you're going carb, weber side drafts give great topend and sound cool. Holleys give nice driveability and better fuel economy than the weber if you can tune'em right.

 

Top-speed is your only interest...

Peripheral Port; EFI vs. Carb is up to your wallet.

 

Peripheral port with independent runner 2 barrel carb or 2 throttle body independent runner FI can't be beat for n/a horsepower. My old wide body GTU 1st gen n/a PP 13B with Weber is stout; I dominate the 3 liter Porsches I race against. I was still pulling strong at 160 mph at Daytona last November when I had to hit the brakes in the braking zone going into turn 1; it would run much faster in a narrow body chassis.