Once again displaying and acknowledging the many gaps in my knowledge and experience, I never was much of a drag racer on a timed strip but perhaps the reason for decent performance from a numerically-low differential ratio in a letter car is that one can stay in the lower gears to higher speeds. On its own in WOT mode, I think the tranny shifts more based on engine speed than tail shaft speed. Controlled by the driver, I would expect the shifting to begin at an RPM where the power curve starts to flatten. With a TorqueFlite, 2.93 axle and 29” OD tires, one could get 60 MPH in low and 101 MPH in second at 5000 RPM tail shaft speed. That ought to just about do it for the quarter mile in any letter car. Does anyone have additional documented time and speed values for letter cars on the ¼ mile strips? Numerically low stay in second through the quarter? Numerically higher finish in high gear?
Brentwood, CA 90+ in the shade today.
Hey Guys, Back in '67 I drove my 'F' once at Fremont Drags. Using 2.93 gears, turned a16.38, slow, but not bad I thought. Hot Rod Magazine had a road test showing 16 flat, 7 years earlier. I don't remember their axle ratio maybe someone out there has the issue. I'm sure all of you remember 6 seconds to 60 mph was considered a pretty good acceleration time, and about 7 sec. for our Brutes, but a Cobra 5.5 seconds, WOW!
Times have changed...now in 2015 my Wife's car.... 2.9 to 60. We are having the time of our lives! Alan
To: rmreed@xxxxxxxxx; gbarker@xxxxxxxxxxxx
He had 9” Le Car wheels….easy!
You surprised me on that one, Gary! Drag racing with a 3.31 RAR?!! That would seem to me to uncompetitively long gear ratio, unless you weren't really serious. I don't recall anyone, even in the NHRA stock classes back in the 60s and early 70s, running anything taller than 3.90. Most were running 4.11s or 4.56s, some 5.12. My daily driver/weekend SuperStocker had a 4.56.
I drive to the strip these days also, 4.11 gears.
Posted by: "Rich Barber" <c300@xxxxxxx>
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