60' times

[HP HUNTER]

Originally Posted by HandOverFist

How does one figure 60' times on a car that carries the front wheels past the beam?

On Johns 67 Chevelle the best 60 was 1.28, on the rear wheels, the best ever 1320 ET was on the rear wheels with a 1.40.

[HandOverFist]

Originally Posted by HP HUNTER

On Johns 67 Chevelle the best 60 was 1.28, on the rear wheels, the best ever 1320 ET was on the rear wheels with a 1.40.

Are you trying to say he tripped the beams with the back tires in both instances?

[Neil Smedley]

when your front tires leave the beams, it starts the clocks.........does not matter if they roll out or go sky high

[HandOverFist]

Originally Posted by Neil Smedley

when your front tires leave the beams, it starts the clocks.........does not matter if they roll out or go sky high

But it does matter which wheels trip the 60' beam...

[Kevin Panzino]

In this case the 60' time is actually the time to go 60'+the car's wheelbase. You car then back cipher what it would have been in the front wheels tripped the 60' beams.

[HandOverFist]

Let's say the car 60' on the back wheels @ 1.40...would it mean the car's actual 60' would have been around 1.29 if the front wheels had tripped the beam? Hard to figure a formula to arrive at it.

[HP HUNTER]

Originally Posted by HandOverFist

Let's say the car 60' on the back wheels @ 1.40...would it mean the car's actual 60' would have been around 1.29 if the front wheels had tripped the beam? Hard to figure a formula to arrive at it.

This was the absolute fastest pass made by this car, and the fastest 330

1.403
3.74
5.86 115.7
9.29 142.3

This was the fastest 60 foot ever by the same car with the lights tripped by the front tires





1.28


I feel this is pretty accurate, a 67 Chevelle that trips on the rear tires runs about 12 hundreths quicker than the 60 foot clocks indicate.

My 68 Chevelle very consistently goes 1.395 on the rear tires, 3.73 330 although a shorter wheel base than the 67.


http://www.trracecars.com/2foot.jpg

http://www.trracecars.com/3foot.jpg

http://www.trracecars.com/4foot.jpg

[1320racer]

Late to the party

Originally Posted by HandOverFist

Let's say the car 60' on the back wheels @ 1.40...would it mean the car's actual 60' would have been around 1.29 if the front wheels had tripped the beam?

yes

with my high 1.1x to low 1.2x 60 footing car, the difference between tripping with the front vs. the back tires is a tenth.

[Don Higgins]

Subtract .10 - .145 depending on weight from the back wheel 60 foot and you will be close.

[Jeff Teuton]

Country puppy has it about right. It's a calculated guess, look at 330 also.