I have no Hight Tech advise,but some Real World advise that might help that I tell all my friends before then switch to a glide. I wish I had knew this myself a few years back before I spend a lot of $$$ for a glide.
Start off in 2nd gear.That will give you a good idea of how your car and engine combo will work with a glide.
This may not be a fair way to compare a T/F to a glide but at least you have a little something else to help you deceide.