7200RPM is 120 crank revolutions per second.
Assuming that the RPMs are 7200 RPM for the entire run (which isn’t actually the case), the crank only turns 444 times for the entire 3.701s pass.
That is truly astounding, if you think about it.
And since it is starting at something less than 7200RPM, and will dip at points in the run, it actually turns out to be less than that.
Someone else commented that the blowers take more power than a nascar motor can produce, which is what, around 650hp nowadays?
That is 650*746=484900 Watts, or 485KW.
What’s even more interesting is that turbochargers are outlawed in top fuel, tmk. In other words, they could go faster, by reducing some of the parasitic losses caused by pulling the supercharger.
The lag thing is solved for all out racing. You just blow fuel and air into the exhaust, spool the turbos, boost is available immediately, which would further reduce ETs. Such systems used to exist for rally cars, but I think they were outlawed.
I read somewhere recently that Garlits actually showed up to a meet with a bottle of liquid O2. NHRA pretty much shut that down after a single pass. Not sure how true it is, saw it on the net :)
The lag thing is solved for all out racing. You just blow fuel and air into the exhaust, spool the turbos, boost is available immediately
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You might want to look at a 60’s company Turbonique... their turbo’s didn’t run on exhaust but used rocket fuel on the hot side , “normal nitro propanol” or NNP