Ha ha

 

WoW, respect for both of these badass machines!

 

I thought i was going to be the one to have to say this.

Vette seems very off pace for the power level.

 

he forgot to set his vtec for the first 2 runs, but that last run... vtec kicked in yo..

 

"About a hundred grand under that hood."

lol

 

Too soon Junior.

 

Looked like s2000 was going to pull hard first 2 runs then had issue. Went fixed his issue then you got to see what it really could do.

Stock motor s2000s have ran in the 8s and 9s.

 

S2000 was obviously the quicker car that day. Definitely doesn't take anything away from that C7 though. Sick car!

 

I based it off the speedo....but... that car did 60-130 in roughly 8.xx seconds. For 700+whp.... that is god awful slow.

Edit: The reason i say thats slow... is because my 450whp un-aerodynamic 5.bro did it in 8.3 seconds.

 

Haha!

 

I was just watching through some of my videos and my car also does 60-130mph in 7.5-8.0 range. Does this mean that I could walk a 700rwhp supercharged C7?

Just kidding, the reason is probably related to speedo lag or some such electronic thing. I know mine is laggy and has other stupid speedo related glitches.

 

The thing is speedos are usually faster then real time. And speedos also have a huge amount of variables. There is no variable in GPS.

 

GPS Trilateration can be pretty damn accurate for constant speed, but the margin of error increases with rate of acceleration. If the GPS receiving unit has a built-in 3-axis accelerometer that can sample real time G-forces acting on the vehicle (like most cell phones do) then the combination of these two streams of data become much more accurate. But a GPS signal on its own is not infallible. Even your standing coordinates can vary 3 to 15 meters or more depending on how many GPS satellite signals are available to your receiver, and if your receiver has one, or multiple GPS antennas. 15 meters is damn near 50ft. Not knowing if you're on the start line, or almost to the 60' is quite a variance if you're wanting to accurately measure acceleration.

If you've ever had a GPS Nav think you're on a different road then you actually are, or taking an off ramp or on ramp that you're not actually taking... While cruising along a street or highway at a steady speed... you can imagine how that level of positional inaccuracy can not be solely relied upon for accurately measuring acceleration.

 

Holy ******' ****, who invited the rocket surgeon!?

 

That's all well and good, but the GPS measurement Evan is referring to is accurate to 0.1 seconds and 0.1 KPH.

 

I didn't realize he was referring to a specific kind of GPS unit.

 

Ok so I have always suspected this. For your fellas who bring your car to the drag strip....the next time you whip the bitch down the strip.....stare at your speedo as you cross the trap. Your needle will show noticeably more MPH than what you end up trapping on the slip.

I have been given an explanation that I am not entirely sure is accurate. The explanation I was given was that the trap speed that the drag strip determines is not actually measured @ the 1/4th mile trap marker when you cross. I was told it was pretty much an estimated trap speed based upon a calculation that only takes in data from the first 1/8th of a mile. Does anybody know if this is true?

Because if this isnt true then what evan said kinda explains why your speedo shows way more MPH when cross than what the drag strip software calculates. But if it is true then were back to square one.

Does anybody know for absolute sure how drag strip sensors/software determine 1/4th mile trap speed?

 

there are sensors at the end of the strip one like 90(or some ****) feet before the end and one at the very end, the time it takes you to cross the last section is used mathmatecily to give ur speed, hence the term "through the traps"
same way the 60' is measured then used to figure how fast u had to be going to cross the 2 points in x.x secs.

 

Referring to the VBOX which is how me and all the locals measure 60-130.