3.73s, 3.90s and 4.10s are great for a mild or stock car, get the engine moving fast and get the car in the powerband. but once you add some power or nitrous or boost the tall gear becomes too much and you find yourself frying tires, going through all your gears too fast.
i ran 3.90s with my car for a long time, n/a it worked great, gave it great gains but once i added my blower it just fries them and just has too much gear, i plan on 3.55s sometime, and i am adding more boost hopefully sometime so its going to need a higher gear for sure then.
if your going to stay stock or pretty mild get 3.73 or lower
if your planning some serious power with a power adder, i'd look to 3.55 or higher, if your getting REAL elaborate i'd even consider 3.27s, the higher gear will make the car easier to drive, and put you in your powerband, a modified engine doesnt need a gear to get it breathing and turning some rpm like a bone stock engine does, so a tall gear does nothing but make it spin tires that much easier and make your low gears useless.
if your doing a drag car pretty much, calculate the rear gear needed to put your car at the end of its last drive gear at the peak hp rpm. for optimum 1/4 mile performance
i ran 3.90s with my car for a long time, n/a it worked great, gave it great gains but once i added my blower it just fries them and just has too much gear, i plan on 3.55s sometime, and i am adding more boost hopefully sometime so its going to need a higher gear for sure then.
if your going to stay stock or pretty mild get 3.73 or lower
if your planning some serious power with a power adder, i'd look to 3.55 or higher, if your getting REAL elaborate i'd even consider 3.27s, the higher gear will make the car easier to drive, and put you in your powerband, a modified engine doesnt need a gear to get it breathing and turning some rpm like a bone stock engine does, so a tall gear does nothing but make it spin tires that much easier and make your low gears useless.
if your doing a drag car pretty much, calculate the rear gear needed to put your car at the end of its last drive gear at the peak hp rpm. for optimum 1/4 mile performance