Captainkirk
Old School Mopar Warrior
I've got an 8-3/4 diff in my Duster 340 4-speed, always assumed it's a 3.91 Sure grip, but how can I positively ID it? Thanks in advance!
What is the cam size and tire size? Then I'll feel you my answer.
3.55
3.91 = in town/track fun, 2800rpm at 55
3.55 = good all around choice for a driver, 2200rpm at 55
Just ball park figures with no overdrive.
Tires=14
Cam, haven't chosen yet but likely will be close to .475 lift 290 duration
OK, determined the pumpkin out of The Duke is a Sure Grip 3.55. Pretty sure the one out of the long-departed Li'l Red Minx is a 3.91....it's very close to 4:1 rotation. So next question: Which would you prefer to run with 340 and A833 4-speed?
Is that cam spec duration @ .050 or advertised and by whom is it made by. Because advertised duration specs differ greatly between manufacturers.Tires=14
Cam, haven't chosen yet but likely will be close to .475 lift 290 duration
I think he was looking for outside tire diameter, not what size wheels you have. A 28" tall tire versus a 26" tall tire will make quite a difference.
Is that cam spec duration @ .050 or advertised and by whom is it made by. Because advertised duration specs differ greatly between manufacturers.
Your wheels are 14 inch. Now what about your tires? Wheel size is useless! Tire size is everything else!