What is the best way to get an overdrive auto in a 67 Barracuda?
I'm running a 440 with a 727 and 355 gears, I ran a 12.40 in the quarter going through the finish line at 6700. Cruising down the road it's around 3600 at 55 mph. Very uncomfortable. I appreciate the information.
Some numbers here are not computing.
mph= (rpm x T.C.)/(1056 x R1xR2) therefore 55=3600 x tc/(1056 x 3.55 x R2
And I get a Tire Circumference of 57.27 inches, which is an 18.23 inch tall tire.
But if figure the 3600 is a typo, for 2600, then I get a 79.3 inch tc which is a 25.24 tire. That's a pretty short tire for a 408!
I ran that combo for exactly 2 summers and I have to agree 2600@56 is very uncomfortable.
But I love the 3.55s around town.
Another number that I'm having trouble with is the 6700 trap rpm,with 3.55s
My math is saying 136mph in direct, and 94 in third with,both 5% TC slip, and those 79 inchers.o Ima guessing you had some bigger track-tires.
With 88s(28"D), I get 150/103 in third.
and 103 is pretty close for a 12.4ET