[Christ]

Yeah, it can be too light if you don't do something about the power/weight ratio.

You don't want a 1400 lb CRX (It's been done) with 200 HP on the street (The obvious B-swaps only have 160 at most, stock... H's go into the 200's easily, K's start higher.)

I'd honestly be wary of anything that light with even a 10:1 PWR. (That's 140HP and 1400 lbs.) The lighter the car is, the less grip (comparatively) the tires have, all else equal. That's not saying that the car has to be heavy to drive well, because we all know that's not true, but you have to re-learn how to drive within your means if you go too light. With my 4th Gen down to ~1700 and with 130 HP at the crank, it was kinda squirrely at times, not wanting to keep traction with high-RPM downshifts. Brake bias became an issue as well, as the car became lighter. The rears wanted to lock up under hard braking.

Frankly, the car was actually faster before I pulled all the weight, or started making more torque. It had enough torque to keep the tires spinning through 2nd gear, and high RPM 2nd gear pulls out of corners would inevitably understeer like crazy, whereas with the stock engine, I could walk the throttle through all but the tightest turns, and never lose traction.

It became a large issue of balance when I started losing serious weight and getting more power. Hitting the gas too hard put the front end straight, and hitting the brakes too hard brought the rear end around... couldn't win.