At a local 660' radar run in a field we won the event with 88mph. This was with an unstudded standard f7. This wasn't a huge event, but the toughest part was getting out of the hole, since you just sit and spin. We just used a steeper helix, otherwise the sled was bone stock.
Is the radar run going to be on glare ice, in a field, or ?? Is their going to be traction and non traction classes?
Bones i have a non-traction sled and do a lot of drag racing. If you run your secondary spring a little looser you will come out of the hole a little better. The secret to drag racing is not to set up your sled for speed, but to set it up to get from point A to point B (660) in the shortest time.
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