Speed RPM & Tire Calculator

[moparcrazy]

This is the Greats Calculator on earth Lol i could play with this thing for Hours ! anyone else have a cool calculator they can post !!

440 Big Block
i have 30 inch tires
727 trans
Gear Vendor overdrive
with 4:10 Rear End

so at 2700 RPM Im cruising at 75.5 MPH



https://www.reillymotorsports.com/store/pages.php?pageid=12

 

[Mopars & Missiles]

Made my own many years ago and still use it.


Just used my calculator to check your numbers and came up with 75.352 mph. That was using an overdrive final ratio of 0.78, but don't know what the GV ratio is. It must be pretty close to that though.

 

[mmissile]

With my cuda/resto-mod setup, I'll be at 70mph at 1800 rpm.

 

[Mopars & Missiles]

I'll bet you aren't running 4.10 gears either.

 

[69a100]

I have this. http://vexer.com/automotive-tools/speed-rpm-calculator

 

[mmissile]

I'll bet you aren't running 4.10 gears either.

Nope. That's the beauty of the NAG1 trans. 3.5 low gear, and .85 overdrive. It'll kill the tires from a dig....and top-end insanely.

 

[Mopars & Missiles]

Nope. That's the beauty of the NAG1 trans. 3.5 low gear, and .85 overdrive. It'll kill the tires from a dig....and top-end insanely.

Gotta love modern technology!

 

[mopar 3 B]

Got a whole file of automotive formulas in excel files. Everything from fuel requirements to ground speed.
Presently stuck on turbo charger sizing and efficiency.

 

[Darius]

Nope. That's the beauty of the NAG1 trans. 3.5 low gear, and .85 overdrive. It'll kill the tires from a dig....and top-end insanely.

Agree!!! Icannot use any of these calculators as none of them have a NAG1 OR a 2.76 gear to select ;-)
I do know I am at 2000 RPM when my speedo says 70mph however! I have been getting 18-20 MPG , I am sure it could be better if I could just drive like an old lady!( or even just maintain posted speed limits)