
Originally Posted by
Lankhoss
I think these discussions get started when people start trying to compare their track times to roll racing.
When two cars are going from a roll, then their trap speed is ALL that matters. It doesn't matter if it takes them 14 seconds or 9 seconds to do so. This isn't something set in stone, but it's a very good rule of thumb to go by.
When drag racing, ET is ALL that matters...trap speed doesn't mean a thing. When you are heads up racing, there is only 1 goal.....get from the starting point to the finishing point in as little amount of time as possible. For someone trying to achieve this, the BEST thing they can do is get the best possible traction so they can use 100% of their power for a longer distance of the track.
There are exceptions to both of these rules in extreme cases. We've all seen cars where someone put gobs and gobs of money into their motor, and didn't take any measurements to make sure it goes to the ground. So yeah, it's POSSIBLE to have a car that can't get ouf the 13's yet traps 135+mph.....I actually had a friend with a built C5R block and STS twins on his Vette, and couldn't run better than really high 12's and low 13's (at Commerce), but always trapped over 136mph, even spinning and part-throttling the car the entire length of the track. The flip side of that, is if someone makes decent power and excellent traction, they can get a good ET AND mph. Thacker's Camaro is a good example of this. He "only" made 420rwhp (80 less than me), but was cutting a 1.6s 60' and trapping around 124mph I believe. I can only trap 126 at the track with low 2s 60's, but would actually pull Thacker much more than a 2mph difference on the highway. A high 9 second car would do better on a highway than a 12 second car with the same power, but the gap in differences on the highway would be SUBSTANTIALLY smaller than they would be at the track.
So GENERALLY SPEAKING......if you're going to do a roll race, trap speed is what you want to look at or talk about, and 60' times mean nothing. But that's not the Bible of speed or anything, it's just a good estimate that often times turns out to be an accurate guess to the outcome of a roll race. But there are a lot of factors to look at before coming to that conclusion.
So these blanket statements of "60' doesn't matter" and such.......well, there is good reasoning behind saying something like that, but it's not QUITE that simple. It seems like cars within the mid 11 to mid 13 second times follow these generalizations almost perfectly. Cars that are faster or slower than that, seem to start straying from those guesstimates more.....at least that's what I've seen in my experience.