Has anyone attempted this combo? I've searched multiple forums, and come up empty. Done a little reading up recently on the final drives, and it got me really thinking about it.

There are a few high-hp TT's trying the 3.3 and liking that. I don't think the Stillen S/C (even in stage 4 form) is putting out enough hp/tq to warrant the change in gear ratios.

I know the 3.9 is great for N/A cars, increasing acceleration by 10% or so. I'm actually thinking that the 3.9 might complement the Stillen stage 4, since this kit makes most of its power in the low-mid range. Of course traction is a limiting factor, and why it wouldn't make sense to put on any of the Turbo kits, or even a modded Vortech kit.

But for my application,would it make sense? Discuss. Thanks

 

I thought about this idea for about a minute or two before I came to realize why I would pass on this idea. I already have a Stillen SC'ed G and a 3.9 FD rear end sitting in my Z. When my Z's motor was pulled I thought about trying out the 3.9 diff in the Stillen SC'ed G. I quickly came to the conclusion that..........
A) The Stillen (for what it is) has plenty of low to mid range torque and great throttle response.
B) The 3.9 FD is good for helping out underpowered NA cars and great for a centrifugal type SC (like the Vortech and Pro Charger, etc.) that are heavily lacking in low end torque and throttle response.
But, the mating of the two Stillen SC and 3.9 FD) would be not too beneficial at all, not to mention a waste of money that could be spent towards other mods I would see more benefit in a 3.3 gear change than a 3.9.