6.1 Hemi 69 Barracuda Fastback Father Son Project
I am having a brand new 3rd member built for the 69 by Randy's Ring & Pinion.
Plan is for 380-460 HP depending on which crate motor we decide on.
All New 8-3/4
489 case
large yoke
Dana Power-Lok
They offer "Smooth" or "Aggressive" setup.
Their description:
"The aggressive one might chatter around turns but would lay down bigger power better."
Would like to hear your thoughts. I don't mind the little eek eek eek I get sometimes turning a tight corner.
I could be convinced that smoother is better for non competition driving.
The other question I have is which gear ratio?
Going to be a cruiser/show and go car, never driven in the rain.
At first I was thinking 3.55 with the 727 + Gearvendors OD .78 so 3.55x.78=2.7 in OD
2.7:1 with 25.7" tall tire = 2354 RPM at 65 MPH Nice!
3.55:1 with 25.7" tall tire = 3017 RPM at 65 MPH This what I have in the ragtop. It needs a GV too.
But with the GV I'm thinking I could go a little lower for good stop light to stop light city driving and in OD still have a decent RPM at cruise.
3.73 with the 727 + Gearvendors OD .78 so 3.73x.78=2.9 in OD
2.9:1 with 25.7" tall tire = 2464 RPM at 65 MPH Still pretty darn good! Could hit the Power Tour and still cruise pretty comfortable.
Please chime in with your thoughts.
The Calculator I used:
Tire Size, RPM, Speed, and Differential Ratio Calculator
Thanks in advance!
I am having a brand new 3rd member built for the 69 by Randy's Ring & Pinion.
Plan is for 380-460 HP depending on which crate motor we decide on.
All New 8-3/4
489 case
large yoke
Dana Power-Lok
They offer "Smooth" or "Aggressive" setup.
Their description:
"The aggressive one might chatter around turns but would lay down bigger power better."
Would like to hear your thoughts. I don't mind the little eek eek eek I get sometimes turning a tight corner.
I could be convinced that smoother is better for non competition driving.
The other question I have is which gear ratio?
Going to be a cruiser/show and go car, never driven in the rain.
At first I was thinking 3.55 with the 727 + Gearvendors OD .78 so 3.55x.78=2.7 in OD
2.7:1 with 25.7" tall tire = 2354 RPM at 65 MPH Nice!
3.55:1 with 25.7" tall tire = 3017 RPM at 65 MPH This what I have in the ragtop. It needs a GV too.
But with the GV I'm thinking I could go a little lower for good stop light to stop light city driving and in OD still have a decent RPM at cruise.
3.73 with the 727 + Gearvendors OD .78 so 3.73x.78=2.9 in OD
2.9:1 with 25.7" tall tire = 2464 RPM at 65 MPH Still pretty darn good! Could hit the Power Tour and still cruise pretty comfortable.
Please chime in with your thoughts.
The Calculator I used:
Tire Size, RPM, Speed, and Differential Ratio Calculator
Thanks in advance!
