I use these 3 now, always used just the 1st one primarily which has worked out very close always>

http://www.wallaceracing.com/accel-calc.php >>... play with the hp no. to get your slip results, take note of deficiencies/gains at certain parameters. Generally this calc shows 1+mph to what my cars and our current car have run but thats down to the 60's of course.

>3000lb/input 688fwhp>

60 Foot E.T. : 1.32
1/8 Mile E.T. : 6.00
1/8 Mile Trap Speed : 113.20
1/4 Mile E.T. : 9.52
1/4 Mile Trap Speed : 141


http://www.wallaceracing.com/et-correction-eighth.php multiply hp shown x C/factor given

http://www.wallaceracing.com/et-correction.php

Fast uses the Moroso ruler which is as good if not better