[nascarnation]

I’d venture to say 70% plus of drag cars are NOT shifted manually.

Lots of HD Powerglides as you pointed out, and the pro classes have air shifted specialty transmissions.

[Zeneta]

I’d venture to say 70% plus of drag cars are NOT shifted manually.

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Are you really sure of that ?

No matter what RPMS the motor can produce, the lag between “increasing RPMS” and the inevitable “MAX RPMS” and the vacuum needed to signal a shift “automatically” is lost power.

I would venture to say that Drag racers are manually shifting in order to maintain an “increasing” RPM engine output.