To convert your timeslip ET and MPH to sea level. Multiply applicable factor times your ET or MPH.
(Example: You ran a 14.4 @ 103 MPH at 5000' elevation track. The correction factors are .9367 and 1.0661 for 5000'. (14.4 * .9367) = 13.50 , (103 * 1.0661) = 109.80 MPH. So the correct timeslip would be 13.50 @ 109.80 MPH at sea level)
Select
the appropriate chart for your application:
Stock and Mildly Modified NA Engines
Extensively Modified NA Engines
Extensively Modified Super/Turbocharged
Engines
Stock
and Mildly Modified Naturally Aspirated Engines
Altitude (in feet) | Elapsed Time Factor | MPH Factor |
---|---|---|
1200
|
.9874 | 1.0129 |
1300
|
.9861 | 1.0143 |
1400
|
.9848 | 1.0157 |
1500
|
.9835 | 1.0171 |
1600
|
.9822 | 1.0185 |
1700
|
.9809 | 1.0199 |
1800
|
.9796 | 1.0213 |
1900
|
.9783 | 1.0227 |
2000
|
.9770 | 1.0241 |
2100
|
.9757 | 1.0255 |
2200
|
.9744 | 1.0269 |
2300
|
.9731 | 1.0283 |
2400
|
.9718 | 1.0297 |
2500
|
.9705 | 1.0311 |
2600
|
.9692 | 1.0325 |
2700
|
.9679 | 1.0339 |
2800
|
.9666 | 1.0353 |
2900
|
.9653 | 1.0367 |
3000
|
.9640 | 1.0381 |
3100
|
.9627 | 1.0395 |
3200
|
.9614 | 1.0409 |
3300
|
.9601 | 1.0423 |
3400
|
.9588 | 1.0437 |
3500
|
.9575 | 1.0451 |
3600
|
.9562 | 1.0465 |
3700
|
.9549 | 1.0479 |
3800
|
.9536 | 1.0493 |
3900
|
.9523 | 1.0507 |
4000
|
.9510 | 1.0521 |
4100
|
.9497 | 1.0535 |
4200
|
.9484 | 1.0549 |
4300
|
.9471 | 1.0563 |
4400
|
.9458 | 1.0577 |
4500
|
.9445 | 1.0591 |
4600
|
.9432 | 1.0605 |
4700
|
.9419 | 1.0619 |
4800
|
.9406 | 1.0633 |
4900
|
.9393 | 1.0647 |
5000
|
.9380 | 1.0661 |
5100
|
.9367 | 1.0675 |
5200
|
.9354 | 1.0689 |
5300
|
.9341 | 1.0703 |
5400
|
.9328 | 1.0717 |
5500
|
.9315 | 1.0731 |
5600
|
.9302 | 1.0745 |
5700
|
.9289 | 1.0759 |
5800
|
.9276 | 1.0773 |
5900
|
.9263 | 1.0787 |
6000
|
.9250 | 1.0801 |
Extensively
Modified Naturally Aspirated Engines
Altitude (in feet) | Elapsed Time Factor | MPH Factor |
---|---|---|
1200
|
.9934 | 1.0068 |
1300
|
.9922 | 1.0078 |
1400
|
.9911 | 1.0089 |
1500
|
.9899 | 1.0100 |
1600
|
.9888 | 1.0111 |
1700
|
.9876 | 1.0122 |
1800
|
.9865 | 1.0132 |
1900
|
.9853 | 1.0143 |
2000
|
.9842 | 1.0154 |
2100
|
.9830 | 1.0165 |
2200
|
.9819 | 1.0175 |
2300
|
.9807 | 1.0186 |
2400
|
.9796 | 1.0197 |
2500
|
.9784 | 1.0208 |
2600
|
.9773 | 1.0218 |
2700
|
.9761 | 1.0229 |
2800
|
.9750 | 1.0240 |
2900
|
.9738 | 1.0251 |
3000
|
.9727 | 1.0262 |
3100
|
.9715 | 1.0272 |
3200
|
.9704 | 1.0283 |
3300
|
.9692 | 1.0294 |
3400
|
.9681 | 1.0305 |
3500
|
.9669 | 1.0315 |
3600
|
.9658 | 1.0326 |
3700
|
.9646 | 1.0337 |
3800
|
.9635 | 1.0348 |
3900
|
.9623 | 1.0358 |
4000
|
.9612 | 1.0369 |
4100
|
.9600 | 1.0380 |
4200
|
.9589 | 1.0391 |
4300
|
.9577 | 1.0401 |
4400
|
.9566 | 1.0412 |
4500
|
.9554 | 1.0423 |
4600
|
.9543 | 1.0434 |
4700
|
.9531 | 1.0445 |
4800
|
.9520 | 1.0455 |
4900
|
.9508 | 1.0466 |
5000
|
.9497 | 1.0477 |
5100
|
.9485 | 1.0488 |
5200
|
.9474 | 1.0498 |
5300
|
.9462 | 1.0509 |
5400
|
.9451 | 1.0520 |
5500
|
.9439 | 1.0531 |
5600
|
.9428 | 1.0541 |
5700
|
.9416 | 1.0552 |
5800
|
.9405 | 1.0563 |
5900
|
.9393 | 1.0574 |
6000
|
.9382 | 1.0585 |
Extensively
Modified Supercharged and Turbocharged Engines
Altitude (in feet) | Elapsed Time Factor | MPH Factor |
---|---|---|
1200
|
.9967 | 1.0034 |
1300
|
.9961 | 1.0039 |
1400
|
.9955 | 1.0045 |
1500
|
.9950 | 1.0050 |
1600
|
.9944 | 1.0055 |
1700
|
.9938 | 1.0061 |
1800
|
.9932 | 1.0066 |
1900
|
.9927 | 1.0072 |
2000
|
.9921 | 1.0077 |
2100
|
.9915 | 1.0082 |
2200
|
.9909 | 1.0088 |
2300
|
.9904 | 1.0093 |
2400
|
.9898 | 1.0098 |
2500
|
.9892 | 1.0104 |
2600
|
.9886 | 1.0109 |
2700
|
.9881 | 1.0115 |
2800
|
.9875 | 1.0120 |
2900
|
.9869 | 1.0125 |
3000
|
.9863 | 1.0131 |
3100
|
.9858 | 1.0136 |
3200
|
.9852 | 1.0142 |
3300
|
.9846 | 1.0147 |
3400
|
.9840 | 1.0152 |
3500
|
.9835 | 1.0158 |
3600
|
.9829 | 1.0163 |
3700
|
.9823 | 1.0168 |
3800
|
.9817 | 1.0174 |
3900
|
.9812 | 1.0179 |
4000
|
.9806 | 1.0185 |
4100
|
.9800 | 1.0190 |
4200
|
.9794 | 1.0195 |
4300
|
.9789 | 1.0201 |
4400
|
.9783 | 1.0206 |
4500
|
.9777 | 1.0212 |
4600
|
.9771 | 1.0217 |
4700
|
.9766 | 1.0222 |
4800
|
.9760 | 1.0228 |
4900
|
.9754 | 1.0233 |
5000
|
.9748 | 1.0238 |
5100
|
.9743 | 1.0244 |
5200
|
.9737 | 1.0249 |
5300
|
.9731 | 1.0255 |
5400
|
.9725 | 1.0260 |
5500
|
.9720 | 1.0265 |
5600
|
.9714 | 1.0271 |
5700
|
.9708 | 1.0276 |
5800
|
.9702 | 1.0281 |
5900
|
.9697 | 1.0287 |
6000
|
.9691 | 1.0292 |