Isolde

iTrader: (4)

So I still have the 3.4L V6 in my 94 Camaro, I have a class 3 hitch, the 4L60E, and a pair of well-fed teens, and I already swapped in a cheap new pair of Moog 300 pound rear coils, and I will be installing some new 81070 fronts next weekend. They're for a Tacoma, but they are 420 pounders, up from the stock 290s. The 300s on the rear are the most I would ever want, not objectionable, but I think most people would love 200s. The stockers were 100s.

JD_AMG

Where did you get 300lbs moog coils that fit the rear? And why 300???
Also tacoma springs fit the front shocks and mounts? They are not really really tall since they are for a truck?

Corvett z07

iTrader: (2)

Uhhhhhmmmmmm.......

If I'm deciphering this correctly, you're carrying a lot of extra weight and need a higher rate spring to hold it all?

BMR Sales2

iTrader: (40)

whoah you have a lot of mixing and matching of spring rates going on here. If you need something that will have a good amount of additional rate while still being balanced and ride good, look at our new SP090 springs they feature a 725/210 rate combination and are designed for handling. But they may help in your case as well

Isolde

iTrader: (4)

I'll try to find the part number for the rears, but I got all 4, new, genuine Moogs, delivered, for under $120. None of the forum sponsors can come close on price.
The rears were shorter unloaded, but my tire to fender gap is the same as stock when parked.
The combined weight of my teens adds more than 550 pounds to the rear when they squeeze in.
My only reason for changing the fronts is because the car feels strange when driving across the gutters on my neighborhood cross streets.
I'm on 225/55R16s, on "salad shooter" aluminum 16x8s, at stock ride height, and on the 270-degree ramp from I-215 S to I-80 E, I can take that at a steady 60 mph, no tire squeal, most cars go 40, it's marked 25. Changing just the rear springs had no effect on that.
​​​​​​​ The stock fronts are Moog 60114, 290 pounds per inch, 14.88" free length, 3.36" inside diameter, 0.57" bar diameter, while the 81070 is 420, 14.51", 3.31", and 0.64", so it should prove a nice improvement.

Isolde

iTrader: (4)

The rears are either cc639 or cc659, can't find the invoice, thought I might determine which by trying to get a 5/8 wrench over a coil, couldn't find a good American wrench, the cheap import wrench did go, suggesting the cc639, but when I find my calipers I will measure.

JD_AMG

Thats an apples to oranges comparison there.
99% of the fbody community doesn't want a 300lbs/in rear spring. The vendors offer lowering springs with good spring rates for handling and ride, moog offers oem replacement parts.
Thats some big kids! How do they even fit in the rear? Im 6ft 190lbs and cannot comfortably fit in the rear seats. With that also being said I would have bought a sedan if I wanted to haul people, especially not a sports coupe with a tiny tiny back seats like our cars, mustangs or porsches. But its your car.
You can also look into springs air bags for the rear for pretty cheap, you stick them inbetween the coil springs and can inflate them too add spring rate. This way when the kids are not in the back you have them deflated and can ride around on normal springs rates, when they get in the back you inflate them to whatever makes it comfortable.

Thats probably the shocks that are giving undesirable feelings, not the springs. *NOTE* oem replacement shocks will not fix this, its the way they are valved is the problem
Let us know what you think. Im betting it will have the car bouncing some and getting a little floaty at speeds (due to the shocks not being able to damp the springs)

Isolde

iTrader: (4)

Just because a spring may be intended as a stick replacement for one application doesn't mean it can't improve handling in another. You really couldn't believe all the different springs, shocks, and struts I tried in the 83 RX7 I custom rebuilt with no Mazda parts remaining, and this isn't my thirst fourth generation Camaro.
With a new pair of adjustable struts, the 81070s should be easily controlled, and the rear 8s behaving fine, those shocks were changed a few weeks before the spring.
My step daughter is very short, so she fits behind tall thin me just fine, my tall stepson behind my short wife.
I have an 03 AWD Astro we mostly use, but the 94 Camaro is the backup in case the Astro ever has to go in for work.
I'm getting the Camaro ready for a turbo 4.8 swap with a 4L80E.