Thats wicked! I can take videos easily when I'm on the track. Thanks for the link. I'll definitely have to try this one out.
Another thing I might add. There's an app for the iphone that measures hp, 1/4 times, 0-60, etc..... For that app to be accurate it needs a good solid base. This DIY holder will be able to provide that solid base for you. It definitely beats paying $30 for a baseline dyno run.Great post and a really good tip! I can now really utilize my iPhone as a nav unit as well. Cheers!