effect of rearend gearing on ET's

Hey Matthew,

A quick observation, your engines peak horsepower is @ 6000 rpm, and your peak torque is @ 4,500 rpm, try shifting @ 5,800 rpm, just to compare the results.

For street and/or fun maybe try a gear somewhere in the 3:73 ratio.
Keep playing with the desktop Dino. It does sound kinda strange that you are getting slower ET's with the 4:11's.

All the best,
Giles