I wish I knew of a dyno somewhere that I could put it on, because I'm really curious how exactly
it stacks up not only to a stock 1300, but also compared to 8-valve and 16-valve 1600s, rather than just a worthless anecdotal seat-of-the-pants feeling or impromptu stopwatch drag races.
Although by no means scientific because we haven't been able to drag race side-by-side, both I and my friend Adam agree that my GTi hybrid engine smokes his 8-valve 1600. The only "side-by-side" comparison we did was driving up the summit from where the Rubicon starts back to my family's house, and at those high elevations with long 2nd and 3rd-gear highway hills, I wound up WAY ahead of him by the time we got back to my place, without even driving like I was racing him. In other words, I wasn't pulling 8500rpm, I was just doing normal 6000rpm shifts.
The closest thing to a scientific measurement of this engine I have are some printouts from that software called Desktop Dyno. After plugging in all the specs for the displacement, cam, etc., it says my motor peaks at 105hp and 92ft-lbs of torque if memory serves correctly. That was much higher than when compared to my friend's 8-valve 1600 in the same software.
Right now I'm just running a Weber. When I get these dual Mikunis on it, I should have no problem keeping up with 16-valve 1600s. My sister's X-90 has one and weighs about the same as my Samurai, and it's a big more powerful, but not all that much more. The big difference is with wind resistance....my Samurai's about as aerodynamic as a barn door, so it would take a V8 to get any kind of highway performance out of the vehicle, but that would just suck the doors right off it at those high speeds anyways.
Suzuki Tech Editor: http://www.Off-Road.com