The day the music died

[deathsled]

I always sang the song drove my Shelby to the Levee.

If they had driven a Ford to the Levee, they would have arrived before it had dried.

So true!

[red66]

Gee, I stepped outside briefly to check my car and it seems the topic has changed.

Like deathsled, my car is equipped with a 3:50 rear end and turns 4,000 at 70mph; this is on BFG 14" radial T/A's.

[deathsled]

Gee, I stepped outside briefly to check my car and it seems the topic has changed.

Like deathsled, my car is equipped with a 3:50 rear end and turns 4,000 at 70mph; this is on BFG 14" radial T/A's.

Thanks for reporting on that. Now, perhaps, the rpms are accurate for this setup. But then again maybe the tachs read incorrectly in the same way.

[gjz30075]

Interesting.  As a point of reference, I, too, have 3:50 differential gears with 205/70 x 14 tires and turn 3500 at 70.   Tach has
been repaired by Phil Severence and the speedo is dead nuts on verified by my phone Speeodometer app.

[s2ms]

I'm also running 205/70-14 on my 66 with 4.11 gears. At 70 mph I'm just under 4000 RPM. According to the online engine RPM calculators (there are many), I should be running 3821 RPM @ 70 MPH with those tires (assuming the online tire calculators are correct) so looks to be right on the money.

[66S285]

Ran past a stop sign “radar” today. Speedomruns 3-4/mph slow. So at 70 running 3400. 215 15 Hankooks