Interesting, did not know that about the ratios being close at opposite ends.+1 for intended purpose. A 3.55 final drive isn't all that aggressive, so the 2.97 1st might be the jam. A 347ci (all-motor I presume) is gonna be torquey compared to the 2vs and 4vs that most people use, so it could be kind of a toss up between the two ratios. Tire selection comes into factoring.
The two ratios aren't that far apart, but keep in mind that the 2.97 gearset has the first three or four gears in close ratio, where as the 2.66 gearset has the upper gears in close ratio. Therefore, the 2.97 gearset will be very aggressive at lower speeds, and the just the opposite for the 2.66 gearset being aggressive at higher speeds.
Just depends on what you want out of it.
Any idea what RPM you're turning at highway speeds (55, 75)?I have 3.55s and went with the close ratio magnum myself. I was happy with where I was shifting.
Yea, if you look at the ratios on either side of 4th gear which is the 1:1 gear, you'll see that the 2.97 gearset has the first three gears pretty close and from experience they make the car move like a bat outta hell from a dig, and my car has a 4:10 so it's particularly nuts in N/A Coyote trim. It's so much fun that I can't stop cheesin'.Interesting, did not know that about the ratios being close at opposite ends.
…the 2.97 gearset will be very aggressive at lower speeds…
Yea, our cars are pretty much the same for power delivery and drivetrain. I absolutely love the T-56 Mag with 2.97 1st and a 4.10 gear. But I'll have to add that the car is N/A with not a lot of mods. If it ever goes 600hp to the ground and beyond that'll probably have to change (either the trans gear set or more likely the diff gear) because I doubt there'd still be reliable traction with WOT at low speeds then. And that's already with 315s on dry pavement.Sums how my car drives nicely with the 2.97 gear set and 4.10’s. It can feel a bit frantic at times I’ve been contemplating switching the final drive for something a bit higher to stretch it out some more.