Gearing help

[47 racing]

1/2 mile track medium banking 2700 bottom end aluminum d port head Holley 500 carb efi intake turn 8100 on 3/8 mile track normally but looking to travel what final drive ratio do you 1/2 mile guys run I'm running. 699 with 2:14 second gear and 327 rear gear

[steveshawjr]

2.73 with a 5 speed should be close

[steveshawjr]

the 2.34 second 5 speed

[boportt]

dont change tranys, usea 273 w. ur 2nd gives u a 584final or go 373 and run 3rd for a530 final or getta 410 r&p from an arrowstar run 3rd give u a 582 final

[steveshawjr]

on our teams enduro mustang we run the 214 2.73 deal and only turn about 6500 rpm at the most but its a tighter 1/2 pavement and there 200lap races

so i guess it depends on the track and how many rpm you want to turn

[84Dave]

A rough estimate in general. For every .1 change, up or down, in the final ratio to the pavement, the engine rpm will respectively decrease or increase 125-150 rpm. -Dave-

[47 racing]

Better to use the 273 second gear combo or the 410 3rd gear I have access to both ratios

[boportt]

i run 1/2 mile w. 536 final and spin 7800