I'm just playing around to see what my options are.
So I got a 65 cuda with a 318 when done I'm hoping it can do between 100-110 in the quarter mile. So let's say it does 105.
I hear you want to be 400 - 500 rpm past peak power so say I want to be 6500 rpm.
So that would be 4.56 gears with 25" tires, well it's mainly a street car don't really want to run that deep of a gear.
So would it be better to just run 3.55 gears and shift to where I gets the best time or say treat the 3 speed Auto as a 2 speed with and overdrive kind of thing ?
What I mean is a 2 speed powergilde with a 1st gear of 1.76 and final 1:1 if I times that by 4.56 would overall 8.05 1st and 4.56 final. Not the deepest 1st gear for a 318 but the cuda is lite.
Now I'm not gonna use a powerglide so say I ran a deep 1st and 2nd gears 904 with 2.94 rear gears. I'd get and overall gear ratio of 8.06 in 1st and 4.53 in 2nd/final. And 3rd wouldn't be used at the track so it would be somewhat like if a powerglide had a .65 overdrive gear.
So basically which would be better ?
The 3.55 option obviously is gonna be better out of the hole. But shifting into 3rd gonna idle across the finish line.
But going with the 2 speed idea with the shifting at 6500 and crossing the finish line at 6500 would be a little more dialed in and has the benefit of an overall lower cruising speed.
