I would go with either of these. I am currently using the 1604-076/077 springs in my 98 ZRT. I am 6'4" ~300lbs.

1604-194/195
diameter .460
angle 90
coils 8.75
coil width 4.53
length long end 16
length short end 6.70

1604-076/077
diameter .460
angle 97
coils 9.00
coil width 4.53
length long end 16
length short end 5.70

 

That sounds like what I am looking for, I hear the 076/077 are very stiff, I am a lightweight, but for the type of riding I do I would rather have the rear suspension be stiff that sag.

Thanks,

ZRjohn

 

I got the 388/389s
75degrees
452 diameter

 

How do the 388/389 seem to work for you? I am a very big guy, 350#, and need the stiffest spring AC makes. I am really tired of bottoming out when I jump things. At this point it is quicker and easier to stiffen the suspension than shed 100 pounds . It also sounds like the 077/076 are a pretty stiff spring also.

 

I have not tried them just got them last week

I am roughly 250LBS

Need snow and then I will tell

 

I can personally vouch for the 076/077 springs. Plenty stiff for anyone who considers themselves aggressive and likes a bit of air. They will work for lighter very aggressive riders with the lightest preload setting and have room for adjustment. If you are lighter move your rear arm to the front hole and adjust the springs to counteract transfer as you like. Even at 210+ lbs I ran my rear arm on the front hole but jacked the preload up and I was very happy with them. If I could still use them I would, they are/were that good.

 

Originally posted by Jeff H@Sep 25 2005, 01:00 AM
I can personally vouch for the 076/077 springs.  Plenty stiff for anyone who considers themselves aggressive and likes a bit of air.  They will work for lighter very aggressive riders with the lightest preload setting and have room for adjustment.  If you are lighter move your rear arm to the front hole and adjust the springs to counteract transfer as you like.  Even at 210+ lbs I ran my rear arm on the front hole but jacked the preload up and I was very happy with them.  If I could still use them I would, they are/were that good.
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Jeff, I want to move my rear arw to the front one hole, have it all the way back to get it lowered, can I do this while the suspension is on the machine. Do I relieve the spring tension, and loosen the track up. Anybody have or can tell me a place for rear spring options for the 97 zr, what will fit/tension etc? Thanks

 

I found the spring info in my performance manuel.

 

Bernie, your situation might be different on the ice ovals in regards to spring rates. I would think the stock 194/195 would be fine for your sled.

Yes you can move the arm with the skid mounted. Just get the rear off the ground and take the pressure off the springs if you can and it will move easily enough. I've done it several times without even unhooking the springs.

If I remember right, I measured the difference in ride height between front and 3rd hole back and it was 1/2" lower in the 3rd hole.

 

Here is a pic of where mine are located, I want to soften up the ride just a bit for my driver. Where are the stock locations? thanks

 

Your problem is with the preload / 90deg angle not wire size.

 

so a 75 degree will be better I dunno

like the 388/389s with 75 deg and .452 wire

 

You should be good Freezer. Do you have them installed now? If so, how much sag with you on the sled?

 

Speedwerx Block Kit

What about this thing guys? Theory is good at least but I don't know anyone who has used it.