what spring rate for coilovers

[Sleeper]

Like the title says.

81 zephyr lsx/turbo. Really need to order the k member soon.

It will see more street duty than track duty.

[naynay]

Stiffer is better but the springs are cheap. Get a couple sets. I dunno what a zephyr is though. Fairmont?

[Sleeper]

thats right naynay. Same thing as a mont, but better.

[STROKD]

Depending on weight of the car, Id go with some 275s front and 175 rears... Thats what my dad's GR40 has on it and it rides and handles great.

[Sleeper]

As it sits right now in stock form its 2500. IM thinking after the swap itll be close to 3000.

[turbostang]

whoa shit.. 275's are WAY heavy for an aluminum LSx block on the front of a fox (assuming it's aluminum?). I'd say some where near 175-200.

There's no 'right way' to really say without scaling the car though.

FWIW, mine are 150's with an iron eagle 8.2" motor and they are a bit too light.

[dville_gt]

i'm running 200/14's with a iron block ls with a heavy turbo up front. the 150's were too light for me.

[Sleeper]

itll prob be the iron blocked 5.3 as thats what i have more available to me in my neck of the woods. If i come across a aluminum motor ill jump on it, but thats highly unlikely.

Ill prob call team z and see if they offer a 175.

[STROKD]

whoa shit.. 275's are WAY heavy for an aluminum LSx block on the front of a fox (assuming it's aluminum?). I'd say some where near 175-200.

There's no 'right way' to really say without scaling the car though.

FWIW, mine are 150's with an iron eagle 8.2" motor and they are a bit too light.

well I have an Alluminum motor and it still weighs 3600 or so

Id suggest 175-200s if it weighs only 3K

[turbostang]

well I have an Alluminum motor and it still weighs 3600 or soId suggest 175-200s if it weighs only 3K

with two turbos, a/c, p/s, p/b full interior, steel wheels etc....

[thesource]

I run 275x14 on the front of my 94 Gt weighing in around 3500lbs.

[STROKD]

with two turbos, a/c, p/s, p/b full interior, steel wheels etc....

ha, I was talking bout the vert... it has aluminum wheels, shit, I dont rock the steelies, but it does have large brakes which weigh like heavy wheels, and a 300 lb stereo.

I hope the 86 weighs closer to 3400 with me in it.

[dville_gt]

i'm sure everyone in here knows this, but wheels and brakes are unsprung weight so they shouldn't be factored in to what spring rate you need.

[naynay]

i now realize i am out of my league. i ran 550lb&750lb on my e30 although it was set up for autoX

[Grape]

1200 lb on the fronts, car weight 1575. 39% on the nose, the heave spring that mounts the front rockers is substantially stiffer