Visit The Dirt Forum for More Information

Author Topic:   Spring heights
posted April 09, 2003 08:40 AM
Any suggestions on heights for springs. 1/3 and 3/8 dirt tracks, med bank. Thinking of going 1000lf 1200rf 300lr 250rr. Any opinions? Oh, also, my first year out. Thanks.

posted April 09, 2003 08:44 AM
odb, I'm running a Mercury cougar with a 351w in it.

posted April 09, 2003 09:31 AM
Here are the Suspension rules:


All suspension components must retain stock location on chassis.
Shocks must be stock appearing, steel, and rubber or urethane bushed. No rod ends.
Springs must be stock appearing and rear coils pigtailed. No monoleafs or plastic.
No panhard bars. No lift or pull bars. All control arms must be O.E.M. stamped steel and length may not be altered.
No weight jacking type of devices allowed.
Ball joints must be stock type, may be heavy duty and reinforced with a strap welded across arm to help keep them in.
All brake components must be O.E.M. No after market components. Rear drums may be replaced with disk provided they are O.E.M. type components.
Brakes must operate on all 4 wheels and no shut off or adjustable valves allowed.

jhon hollomon
posted April 09, 2003 11:33 AM
The key there is stock appearing. You can run racing springs as long as they look stock. You can run stock mount racing shocks too. I'd say your pretty close on your spring rates but i'm not sure on the hieght of the ford springs.

posted April 09, 2003 01:21 PM
Hey John;

But what makes them "qualify" as stock appearing? Is there something that distuinguishes stock springs from others?

posted April 09, 2003 02:34 PM
odb93 is pretty much right. You can paint them black or get a little overspray on them to make them look old. They aren't gonna check you at LA or Warrensburg. The only thing they might check is that you aren't running adjustable spacers. I ran afco street stock springs. They came black and were stock height and they never said anything about them. The difference is a racing spring is shorter and requires a spacer where as a stock appearing spring is a stock height racing spring.

[This message has been edited by jhon hollomon (edited April 10, 2003).]

posted April 10, 2003 09:45 PM
Also, in Day motorsports catalog you can buy different legnth and weight springs to adjust your ride heights. No one will ever know they arent the same legnth unless they take them out and measure them. Mine came unfinished but some blk rustoleum took care of that. Its also nice knowing the exact rate of your springs to help with adjusting instead of guessing with used stock springs that are cut........

posted April 11, 2003 03:27 AM
Afco pigtail springs are NOT stock heighth! They are only 11" my opinion, too short. The tru-coils are about 14" , and have "stock looking" pigtails on both ends. The afcos have only ONE pigtail side. PLUS..... The the TRU-COILS stay in easier, the AFCOS can be more prone to "falling out" when you hit a good size hole or...the worst, you're in a hurry to change a flat, and you don't get the AFCO seated right.

Back to the Archives