PDA

View Full Version : question for those about et vs mph


ImpalaSlayer
03-07-2009, 10:26 AM
ok guys i need your help here understand whats going on. let me say this, my best time from last year was as follows:

60'-2.214
330-6.085
1/4-14.16@99.07

now last night i beat my previos best time with this:

60'-2.07
330-5.92
1/4 14.06@98.61

my question is why is the mph lower on my fastest run? shouldnt it have been faster since i got outa the hole nearly 2 tenths quicker? would this be due to the 255's vs the 245's?
Zack
03-07-2009, 10:29 AM
Since the first 60 feet matters most, the slower mile per hour could have been due to different air density or yes, the 255's

Dont read too much into it, you DID go faster.
ImpalaSlayer
03-07-2009, 10:31 AM
i know i coulda ran a 13 but they shut down on me :( i was just getting the settings and all right.
DTRMiguel
03-07-2009, 11:53 AM
Ill run one for ya tomorrow davey dont worry
Blk Mamba
03-07-2009, 01:53 PM
In drag racing it's quickness, you are trying to achieve, not speed.
ctrlraven
03-08-2009, 01:41 AM
You need to practice your launching some more.
1st try
60' 2.09
14.19

2nd try
60' 2.05
14.07

3rd try
60': 2.021
13.720 @ 99.76 mph

4th try
13.74 @ 99
DTRMiguel
03-09-2009, 11:09 AM
You need to practice your launching some more.
1st try
60' 2.09
14.19

2nd try
60' 2.05
14.07

3rd try
60': 2.021
13.720 @ 99.76 mph

4th try
13.74 @ 99

Ugh i dont understand yesterday i ran 14.6 @ 97.46 WTF :mad2:
Your running 2mph faster and a whole second... Whats the deallie yo?
Blown3.8
03-09-2009, 08:58 PM
This is for the same vehicle, not 2 different cars with like mods. Generally if you get a better 60' time your mph will be slower. The reason is the car doesn't have as much distance to gain the speed.
red
03-09-2009, 09:36 PM
Terminology check: 'quick' describes E/T. 'fast' describes MPH.
red
03-09-2009, 09:37 PM
Generally if you get a better 60' time your mph will be slower. The reason is the car doesn't have as much distance to gain the speed.
I agree that a better 60' (a better launch) seems to yield a quicker E/T, but slower MPH; this has been my experience. However, I am wondering about your rationale. Are you describing perfect traction versus some wheel spin?
Blown3.8
03-10-2009, 08:17 PM
Are you describing perfect traction versus some wheel spin?

Yes. Lets say you launch at 4k rpm and don't spin the car will have jumped out lets say 20' then starts accelerating from there. But if you launch and you spin the car only jumps out say 10' and accelerates from there and has more distance to gain speed.

Hope that makes some sense.
Quickvic30
03-13-2009, 04:57 PM
Its all in the launch! :)

1.86 60'
13.41@99.86mph here!