I'm curious: how much spark lead do these RB blower motors use? I've heard numbers as low as 15 degrees for LS. Yellow Bullet probably has some traffic on this.
For higher horsepower turbo LS (say 1200-1600hp) I usually end up at most high teens. Maybe 17deg at 30psi on race fuel or E85. A few deg less at peak torque. 10 to 10.5-1 static CR
Factory forced induction LSA/LS9 at 20psi or so can run mid 20's timing on E85.
My first forced induction endeavor was a roots blown big block chevy when I was 19 in 1997. Because of books I read at the time the compression was -WAY- too low at 7.8-1 so it would take 30 deg from a locked out distributor with 12psi boost on 93.
