Quarter mile times vs. engine type and power output?

[xb-60]

Originally Posted by olddog

...You may want to ask what type of tires are used at the track. How much power you can hook to the ground has to do with tires...

Yes, tyres are a significant factor. I suggested specifying whether 15" or 17" wheels
Cheers,
Glen

[olddog]

Originally Posted by xb-60

Yes, tyres are a significant factor. I suggested specifying whether 15" or 17" wheels
Cheers,
Glen

The OD of the tire is part of the gear ratio calculation.

Wheel OD doesn't matter much in a drag race. At least I cannot think of why it would.

What I was actually talking about is how sticky the tires are. Street tires are hard designed for long wear. Drag slicks are very sticky. A huge difference in traction.

Then the drag strip puts a tacky surface down. They do use different stuff for different competitions. The tack will pull your shoes off, if you don't have them tied tight. So from one track to another, even the same track on a different day, there can be quite a bit of difference.

Horse power at a dyno is corrected to what the engine would have produced at sea level at a specific temp and other weather conditions. In theory, this allows an apples to apples comparison regardless are where the dyno is located and what the weather is. The point is that no matter what the dyno said the Hp is for an engine, the elevation of the track and the weather conditions will impact the true power that the engine is making.