Oh, that's a thought - I've A-rated the power plant. I probably don't need that if I lose weapons. That'll get 0.5T back. Every little helps.
IIRC, I originally had mine set up with a 2D PP, an engine-biased P-dist and (of course) G5 DDs.
Obviously, there were no weapons, shields, scanners or any other junk to draw power or add weight.
Also, don't forget that you can also free up more power (if necessary) by shutting down anything which doesn't help you go faster (cargo hatch, sensors, data-link scanner etc).
When I re-purposed it as a "proper" recon' ship, I think I played around with a 2A PP and a 3D PP but in the end I just stuck a 3A unit into it.
Also, FWIW, my iCourier
is set up in a similar way but that has some cargo space and a couple of lasers so it's more of a "HazOps delivery vehicle" whereas the iEagle is a pure recon' ship.
If you're looking for some gameplay to put your newfangled speedboat to work, I really recommend checking out some of the various listening posts people have found.
An iEagle with a fuel-scoop and a G5 FSD is perfectly viable for jumping around the bubble and you WILL need the speed and agility when you stumble on the Black Flight.
Forget about weapons.
The trick is to get 'em to chase you for 10 minutes then bung a U-turn and return to the objective (at full speed) before they can catch up again.
On which note, I
think that's why I ended-up installing shields on my iEagle.
If you're trundling along at 50% throttle, with 3 or 4 Black Flight Anacondas in pursuit, and you get a bit careless with the separation it's handy to have shields that can soak up one or two shots.