Quote:
Originally Posted by ss wannabee
I wonder when NHRA "pulled" the 4-spds out of the '57 Pass Cars...what most of the
owners did...and how much slower was the car with either a 3-spd stick...or the PG?
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From what I have learned from this thread, the HAMB Junior Stock thread, and Boyce's Junior Stock book, a lot of stuff was legal in 1969 but not in 1970:
* Chev Sedan Deliveries:
* Hydramatic ok in 1969
* Had to run iron PG in 1970
From the data I have, it looks like folks lost a couple tenths at first, but as the 4000-stall converters caught on the difference almost disappeared. The Gonkulator runs I am computing show about the same.
* Chev 57-58
* 4spd ok in 1969
* Had to run 3spd in 1970
* Again, maybe a couple tenths was lost though data is sketchy, I don't have any direct before & after.
* The Gonkulator calculates that most of the loss was in the shifter - the 3-on-the-tree was a LOT slower, but even on the floor, the 1-2 shift is fast on a 4spd but slow on a 3spd (unless you get clever with the shifter as some did).