Engine comparison
I tend to look at facts in the form of numbers so here they are.
Engine / Weight / Power/ Power to Weight ratio
Webra SD 40 GT/ 12.69 oz /1.3 hp@16000 rpm's/ .1024 hp/oz
Webra SD50 GT/ 11.28 oz/ 1.5hp@16500rpm's/ .1329 hp/oz
Rossi 45 R27/ 15.10 oz/ 2.1hp@16000 rpm's/ .1390 hp/oz
Rossi 50 R67/ 15.52 oz/ 2.2 hp@18000 rpm's/ .1417 hp/oz
I think one can see two things, First look at the weight of the Webras, the 50 is lighter than the 40 so that means the 50 is probably a bored out 40. I wonder what the durability of this motor would be.
Two: I could not believe how light the Webras are, man those things are light. BUT look at the Power to Weight Ratio's P/W, the Rossi's kill-em. As a matter of fact the Rossi 45 has a higher P/W
than the Webra 50.
I picked up about 12% with my UltraThrust equipped Rossi 45 R27.That gives me 2.35 hp@ 17900 rpm's with a P/W of .1556 hp/oz.
*all numbers taken from MFG's web sites except for the numbers on modified Rossi.
LeeU