Modded Mustang Forums banner
1 - 2 of 2 Posts

·
US Air Force (retired)
Joined
·
13,542 Posts
Discussion Starter · #1 ·
I only have a limited set of data (six time slips from the same day) but I've noticed some interesting patterns. We all know that the faster '60 foot means a faster 1/4. But there is a compounding effect. For example, a 2/10th faster '60 might result is a 5/10th faster quarter. I'm sure the professional drag racers among us are aware of this, but its new to me and I thought it was interesting.

There are exceptions but in general these observations held true for all 6 data points. They are:
1. The faster the '60; the faster the 60->1/8 time.
2. The faster the 1/8; the faster the 1/8->1/4 time.
3. The higher the 1/8 speed; the higher the 1/4 speed.
4. The higher the 1/8 speed; the lower the speed gained 1/8->1/4.

My fastest and slowest time slips of the day:
60..................2.086.........2.347........0.261 slower
1/8.................8.560.........9.057........0.497 slower
1/4................13.029.......13.595........0.566 slower

60->1/8..........6.474..........6.710........0.236 slower
1/8->1/4.........4.469..........4.538........0.069 slower

1/8 speed.........87.35.........85.11........2.240 slower
1/4 speed....... 111.48.......109.95........1.530 slower
1/8->1/4 gain....24.13.........24.84........0.710 faster?

I know this is stating the obvious but the first half of the race is traction and the last half is power. It appears that the faster the 60' the higher the speed entering the 60->1/8 portion so that you run that increment faster. The same holds true for the 1/8->1/4 increment. But the last half of the race is limited somewhat by power. The time gained during this part of the race was only 0.069 seconds faster and the increase in speed was actually 0.71 mph slower.

Probably not an earth shaking revelation but I thought it was interesting. Has anyone else observed this?
 

·
Registered
Joined
·
1,318 Posts
Yeah...a good rule of thumb is that for every .1 you can shave off of your 60' time, you'll pick up .2 in the 1/4.

Traction is definitely a very important factor in ET in the 1/8 mile. That's part of the reason I've chosen to focus on tires/suspension before adding a lot of power since I don't have a 1/4 mile track anywhere nearby.
 
1 - 2 of 2 Posts
Top