You guys with S-Trims, what are you spinning your S-Trims at? With a 7" crank pulley and 2.85 blower pulley shifting at 6000rpm, i'm right at the suggested max rpm for the S-trim according to vortech. My 383 will handle a lot more boost then that set up is putting out, but don't know if I should spin it any faster then vortech's 50k rpm. Is it safe to spin it over that figuring its only gonna see over 50k at the track occationally? Wouldn't mind putting on a 2.75 or even 2.65 pulley but that would run it between 52k and 54k at the shifts. Also, if the s-trim is rated at 50k and the t-trim at 55k, then whats the difference internally that dictates that limit? Anyone know? Thanks.

Ken R.

 

http://para.noid.org/~lj/

He's run in the 9.9x at 140 using an S-trim and 7"/2.75" pullies.