Tighten New Springs A rule of thumb with springs is that four quarter turns equals a full revolution and the spring needs to be tightened a full revolution for every foot of door height (e.g. 7-1/2 foot door = 7 revolutions +2 (30 quarter turns).Click to see full answer. Consequently, how many turns on a 8ft garage door spring?Anwser: It will still be the same number of turns as your old garage door springs. 7.5 full turns or 30 to 31 quarter turns for a 7ft tall door and 8.1 full turns or 33 to 34 quarter turns on an 8ft tall door.Similarly, does Lowes sell garage door torsion springs? Now that you know that retail hardware store like Home Depot neither Lowes carry torsion springs, you can look for them in some near by garage door supplier, online or just call a garage door professional and if you have a standard steel garage door – it should cost anywhere from a one hundred and fifty ($150) to two Keeping this in view, can I use a longer torsion spring on my garage door? If your garage door springs have lasted less than five years, or if you plan to live where you are for many years, you may want to try the extra long life torsion springs. By using larger springs you can, in most cases, quadruple your spring life while only doubling the cost of the springs.Does Home Depot sell torsion springs?Torsion Spring – Residential Garage Doors, Openers & Accessories – Doors & Windows – The Home Depot.