Trap speed question...

Y

yellow1995Cobra

New Member

Dec 23, 2002

2,959

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Massachusetts

Nov 8, 2005

#1

• Nov 8, 2005

• #1

Hey guys,

Is it true that your 1/4 mile trap speed is actually an average top speed for a certain amount of feet(100 feet i think?) at the end of the track? Not the ACTUAL speed your at when you pass the finish line?

Ive read this a couple time on the forums, just looking for a definite answer to this.

Also, if this is the case... When im using one of those trap speed calculators, u know - input tire hieght, gears, and u get the trap speed at a certain RPM. Well, is that # the average top speed, or the ACTUAL top speed?

Ive been wondering this, and ill be getting some quick time pro drag tires for next year and im trying to size them to the 4.10's ill have next year.

Thanks for the help! :SNSign:

 

Killercanary

The car that set the bar.

Founding Member

Nov 29, 1999

5,676

1

76

Altoona, PA

Nov 8, 2005

#2

• Nov 8, 2005

• #2

Jesse, it is in fact an average MPH for the last 66'. Look at any track at the 1/8th and 1/4 mile markers and you will see there are 2 timing sets 66' apart at these two locations both of which give you an average. As for the calculators... that is a question I never thought of before. I'd assume it was your average, but I have no proof of that.

 

BlueOvalStangGT

Active Member

Oct 27, 2003

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Tampa Florida....USF!!!

Nov 9, 2005

#3

• Nov 9, 2005

• #3

Wow I never knew that.

 

WhiteDevil

New Member

Feb 4, 2003

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San Diego

Nov 9, 2005

#4

• Nov 9, 2005

• #4

I always just thought there were two beams at the end and it calculates the distance between them and then the time it take to get from one to the other to calculate the trap speed.

 

Killercanary

The car that set the bar.

Founding Member

Nov 29, 1999

5,676

1

76

Altoona, PA

Nov 9, 2005

#5

• Nov 9, 2005

• #5

WhiteDevil said:

I always just thought there were two beams at the end and it calculates the distance between them and then the time it take to get from one to the other to calculate the trap speed.

Click to expand...

That is how it works... thus giving you your average speed.

 

94MustangGT5.0

New Member

Apr 30, 2003

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Champaign, Illinois

Nov 9, 2005

#6

• Nov 9, 2005

• #6

Fascinating, I never knew that.

 

Y

yellow1995Cobra

New Member

Dec 23, 2002

2,959

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Massachusetts

Nov 9, 2005

#7

• Nov 9, 2005

• #7

Killercanary said:

Jesse, it is in fact an average MPH for the last 66'. Look at any track at the 1/8th and 1/4 mile markers and you will see there are 2 timing sets 66' apart at these two locations both of which give you an average. As for the calculators... that is a question I never thought of before. I'd assume it was your average, but I have no proof of that.

Click to expand...

I knew you would chime in Paul. Good info!

Now we just need to find out about the calcs. Im sure its close anyways to not make that much of a difference.