Originally Posted by jim schmidt
As noted, the difference between a 525 and 520 chain (100 links) is about 3/10 lb.
Correct, but if you switch to a rear aluminum sprocket, weight savings are much better. As i stated previously, doing the conversion (with aluminum rear) saved me 1 pound (well, 15 ounces to be exact). Ask any professional drag racer, reducing rotating weight (wheels, brakes, etc etc) makes a huge difference.
To state another example, a buddy of mine had a 97 Mustang GT...bone stock except gearing. He had Cobra R (17 inch) rims on it and ran a best of 14.5 on street tires, and 14.0 on slicks. Switching to pro stars (LITE drag wheels), he went 13.7 on street tires. This was with NO other changes.
Lighter is always better, but more so in the chain/sprocket and wheel area.