Coil-over spring rates

[Grape]

I knew the amount of weight on the front wouldn't change, but I am thinking that I am literally basically bottoming out these springs just sitting on them. That is why I cannot push down to further compress them at all.

well you gotta use your eyeballs at ride height and see if they are binding, we put tape on the tops of the coils to see how hard we are coilbinding. i thought that first picture was at ride height.

[dville_gt]

no matter what spring rate you put on the car, the amount of weight the springs are carrying will not change, stiffer spring just gets less displacement from free height to ride height. your car is probably 55% on the nose.......so should be 1650 on the nose, maybe more.

I knew the amount of weight on the front wouldn't change, but I am thinking that I am literally basically bottoming out these springs just sitting on them. That is why I cannot push down to further compress them at all.

[Grape]

what are the odds that these springs are just weak and not holding up to their rating. 150lb spring compressed 6" is 900lb per spring or 1800lbs on the front axles. seems pretty high for a car i'd guess only weighs ~3000lb

no matter what spring rate you put on the car, the amount of weight the springs are carrying will not change, stiffer spring just gets less displacement from free height to ride height. your car is probably 55% on the nose.......so should be 1650 on the nose, maybe more.

[dville_gt]

bolt it back together with no spring, and make sure the strut isnt bound up with the swing of the lower control arm. We use dummy penske's on the oval stuff with no spring installed just to make sure the shock mount doesn't create a bind in the shaft.

tried this yesterday. shock traveled through it's range without a problem.

[CRASH]

in that case whoops, i guess that makes some sense however as the fewer inches of spring you have the higher the spring rate would need to be. as i understand it the weight rating is how many lbs it takes to compress the spring 1". obviously if the entire spring is only 8" you couldn't have as much compression, but i just never see any mustang guys running such short springs so i figured he was being a smart ass.

Just thought I'd point out that it seemed to me like he was genuinely trying to help.

[dville_gt]

what are the odds that these springs are just weak and not holding up to their rating. 150lb spring compressed 6" is 900lb per spring or 1800lbs on the front axles. seems pretty high for a car i'd guess only weighs ~3000lb

[Grape]

in that case whoops, i guess that makes some sense however as the fewer inches of spring you have the higher the spring rate would need to be. as i understand it the weight rating is how many lbs it takes to compress the spring 1". obviously if the entire spring is only 8" you couldn't have as much compression, but i just never see any mustang guys running such short springs so i figured he was being a smart ass.

short springs are lighter, we run the shortest we can...........

[Grape]

I don't know the logic either. I asked Wolfe a while back and they recommended 130-150lb 14" springs for this application (again, without knowing front axle weight). My front is rock hard though, cannot possibly be correct as it sits. Seems like that coil couldn't compress much at all before the coils literally touch each other.

bolt it back together with no spring, and make sure the strut isnt bound up with the swing of the lower control arm. We use dummy penske's on the oval stuff with no spring installed just to make sure the shock mount doesn't create a bind in the shaft.

[dville_gt]

I don't think he was being a smart ass, dude.

in that case whoops, i guess that makes some sense however as the fewer inches of spring you have the higher the spring rate would need to be. as i understand it the weight rating is how many lbs it takes to compress the spring 1". obviously if the entire spring is only 8" you couldn't have as much compression, but i just never see any mustang guys running such short springs so i figured he was being a smart ass.

[Mach1]

i really don't understand the stupid low spring rates for a 3000 lb street car. We run 150's on the front of a 2600lb paved latemodel when we are using bump stops and a 2" sway bar. car will go thru tech at the correct valance height, then as soon as you touch the brakes the nose never comes up

The car in question can only drive straight

[dville_gt]

I don't know the logic either. I asked Wolfe a while back and they recommended 130-150lb 14" springs for this application (again, without knowing front axle weight). My front is rock hard though, cannot possibly be correct as it sits. Seems like that coil couldn't compress much at all before the coils literally touch each other.

[CRASH]

I don't think he was being a smart ass, dude.

[Grape]

i really don't understand the stupid low spring rates for a 3000 lb street car. We run 150's on the front of a 2600lb paved latemodel when we are using bump stops and a 2" sway bar. car will go thru tech at the correct valance height, then as soon as you touch the brakes the nose never comes up

[dville_gt]

500 lb 8" spring will solve your problems.

[Grape]

500 lb 8" spring will solve your problems. you need some barrel springs so they don't slinky and touch the adjuster sleeve. if you can get it to my shop you can use my scales........