Question about gearing for Top Speed

harrisonm said

I understand the math. Maybe I wasn't clear. I totally understand that higher gear ratios (ie 2.76) will produce a higher speed at a given RPM compared to a lower ratio (ie 3.55). I was just assuming there was a certain point at which the engine would bog down as it tried to overcome an extremely high gear ratio. Kind of like trying to start out in 6th gear. Or maybe it becomes a matter of overcoming friction from wind drag. In which case, you need more HP. Just wondering.

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Gearing for top speed generally the car will dead out of the hole lot of speed record cars need a push car to get them going but as you get up in mph you get up into the engines powerband. Say you go a 500 hp engine at 6500 rpm and geared so peak power is at the top speed you want and that's enough power to do so it shouldn't be bogging down your at peak power and have 500 hp going to the ground minus drivetrain loss.

It depends on the top speed your looking for, a drag is geared to be around peak rpm at that top speed it can do in a quarter mile so like a 12 second car at 110 mph its not really gonna bog anywhere.

Do you have a goal or is this a general question ?