IPhone mounts for Track Day Video

[NewArt]

Your mounting appears solid. The trick is always to get the camera as close to the suction mount as possible. Some phones have better image stabilizing than others. Make sure it's turned on
Often it's better to use a small action camera mounted directly to the windshield. You can match up the video with the data in post. I've used the SJCam M20 super cheap 4K cameras with great success!