Rino

Will I have to do a lot of adjustments to keep the RH from 700/800 to 800/1000?

Andrew C.

ride height. it helps if you know the corner weights of your car too.

800 lb/in spring rate means 800 lbs will compress the spring 1 inch. likewise 1000 lb/in springs will take 1000 lbs to compress 1 inch.

take the rear of the car for example. say we have a 3800 lb car w/ 60/40 weight split. this means 1520lbs over the rear axle or 760 on each wheel. this will compress your 800 lb/in spring roughtly 1" while only compressing your 1000 lb/in spring .76" so the rear of the car may be 1/4" higher than before with no changes to the spring perches.

only thing is that a change on the spring perch will not have the exact same change in ride height since it is somewhat inboard of the hub/wheel. i think i've seen some posts regarding the relationship of spring perch movement vs. actual ride-height, but that 1/4" difference in spring compression will be a bit larger. maybe 1/3"?

anyway, you get the idea, but it should be enough to calcualte the difference in spring compression and use that for a starting point for how you adjust the perches for your new springs.

HTH.

Rino

Thanks!