Shelty

hey, looking at ford racing springs, late model resto has a deal on them for them at 170 bucks.. going with the ford racing G springs, cuz they are for convertibles...

whats the difference for specific rate and progressive rate springs, what would be best for a street car?

86 5.0L

I believe progressives are better for the street

progressives - get stiffer the more compressed they get, so on the street the will be 'softer'

linear - stay the same stiffness throughout the whole compression range, they give a more predictable feel, but are less forgiving over bumps

67mustang302

Progressive rates suck.

If you want a soft ride, get a soft spring, if you want a performance ride, get a performance spring. A progressive requires the spring be compressed a fair bit before it stiffens up for performance, generating a lot of body roll and defeating the purpose of a performance spring.

domindart

If you want to be like me get progressive, thats whats in my car.

redpony88

i have the summit springs. and oh yea the vert thing doesnt matter. same thing, it may drop a vert a tiny bit more. but i also put lakewood traction action lowers on without the braces cause the guy i got them from didnt have all the bolts.... so i just threw them on for now, and i'll get around to putting the braces on sometime. right now my street car has the stance of a drag car going down the road hahaha

302army187

id go for progressive. will be alot easyer on you, and feel better.

plus the HEAVYZOMG 'vert will compress the "progressive" spring a little more, so it will be better with less bodyroll, and "spring-ness" over bump's then other car's.

let me know your results. Im intalling strange 10way adjustable shocks and struts on all 4 corners this weekend, along with UPR upper and lower control arms. Im keeping the stock springs for now, to see how the car react's with the new stuff. I think ill be fine but we shall see.

5.0stanger

Stock springs are linear or specific rate, so if you like the stock ride, get linear, if you want it softer, get progressive. I have all linear on mine.

Shelty

thanks. so I would be fine with just buying a set of regular "B" springs? I talked to a rep from Max. Motorsports and they said that convertibles need a different spring rate etc... or something, cuz they are different than coupes.. told me the car would ride like crap unless I got vert specific springs.... now he may have been pulling my leg to make a more expensive sale... I dunno...

I dont really wanna drop my car into the weeds.... the roads at school and home are rather crappy and I dont wanna take a chunk out of my oil pan when I hit a pothole...

my car rides fine, except on rough roads, but I also think that the worn 18 year old parts contribute to that...

302army187

start with shocks and struts like I am.
strange 10way adjustable's on all 4 corner's are pretty damn cheap. considering other brands prices.

should have them done this weekend. ill let you know the difference.

OnyxCobra

I think this is assuming the spring has to compress A LOT before it stiffens up which really isn't the case. My Progressive rate lowering springs show way less body roll than the stock linear rate springs.