L24.
Dry, No AC/PS, No FW/Clutch
362.8 lbs
SR20DET.
With aftermarket clutch, top mount exhaust manifold, external wastegate, cast pan, oil, and alternator.
349.8 LBS
Internet weights being what they are (even though Braaps weights i trust) take them with a grain of salt. I couldnt find a l28et with no transmission weight so I used a standard l24. The SR20 will be lighter than a Lima motor, but my guess is that the Lima is the same if not lighter than a L28et, but not by much.