Dyno difference between S60 and 9"?
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The main reason I bought my s60 was because it was a great price and I got it through Carl. He stopped selling the 12 bolt before I bought my rear, but if he still did I wouldn't have thought twice about buying one. The 12 bolt is a very stout rear and there's many single digit cars running them.
My fab 9 is only about 10lb heavier than my 10bolt was. But have the aluminum center and the mwc tq arm is lighter than stock to.
All things equal between a stamped nine inch, stamped 12-bolt, or stamped S-60 will show zero differences at the track on your average vehicle. Start removing weight out of the vehicle and you will start to see gains faster.
As far as at the track I went from a 131.3 mph best trap with the 10bolt to a best trap of 130.4 with the fab 9.....but I have been quicker on the fab 9 and I can drive it to the track now with no worries. I also think with a better tire there is more et left that the 10bolt just could not achieve.











