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Author Topic:   Front Springs, Metric (Ride Height)
Deak-Jr
Dirt Forum Racer

Total posts: 81
posted May 03, 2004 10:50 AM  
Sorry to post the 5000th question on this topic.

LAST YEAR -- ran a metric Monte ....

RF: 1100# (12")
LF 900# (about 12")
RR: 185
LR: 220

Decent ride height, a hair taller in the front & on the right (around 8" or so on ride height).

THIS YEAR -- same car, front end put on diet, a little taller on tires (shorter gear) ...

RF: changed to a 1200#, 12"
All others the same.

Car sticks WAY up on the RF -- 2" difference ride height from RF to RR. Looks like a '67 Impala ready to cruise the strip. In other words, looks like it'd push like Santa's sled.

MY IDEA: take the old 1100# RF spring, put it in a bucket of water except for the top few inches, and torch off an inch.

I am guessing that would make the car sit about 1" higher (or less) in the RF compared to the RR, and about 1/2" higher on the LF (compared to LR), and probably about 1/2" higher on the right side in general.

Good idea? Bad idea? Any ideas are welcome. Suspension is stock, by the way.

Thanks much.

[This message has been edited by Deak-Jr (edited May 03, 2004).]

alias
Dirt Full Roller

Total posts: 43
posted May 03, 2004 03:44 PM  
I have cut springs before, but I did it with
a chopsaw. The torch heat is supposed to mess up the tensile strength of the spring or something hi-tech like that. Also, when
you cut a spring shorter the rate goes up.
If you could get away with it---i would put
one of those hidden buckets or spacers up in
there and by a shorter spring. Be careful
how much you cut off. I'd go a little at a
time until you get what you want. If you
cut off too much to start with---oops, time
for a new spring. Good luck

jay116
Dirt Freak

Total posts: 428
posted May 03, 2004 03:56 PM  
"If you could get away with it---i would put
one of those hidden buckets or spacers up in
there and by a shorter spring."

OK ... if this were done, would you want a "softer" spring? In other words ....

IS THIS TRUE?
8" tall, 1200# spring w/3" spacer = 11" tall 1200# spring

Seems like it'd act more quickly and compress less, but I don't honestly know what one would do compared to the other ....

Thanks for the replies, much appreciated.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted May 04, 2004 12:11 PM  
go to www.proshocks.com they have some calculators. then you can see what changes to the spring it will make, i mean you can type it in and then type in how many coils will be left and then see what the rate is.

juliaferrell
Dirt Freak

Total posts: 370
posted May 04, 2004 02:33 PM  
Cutting coil with a torch is fine. There is no direct relationship between how much you cut off the thing and the ride height. A 12" spring can have the same installed height as a 13" or a 10". If you are setting up a metric front end I would recommend the 9 1/2" with a 1 3/4 spacer *rubber ones you can buy at advance auto parts* for the passenger side and a 3/4" (take the 1 3/4 one and cut an inch off) on the driver's side. You can put the spacer up in the bucket or on the a arm. Sounds to me like your setup all the way around needs addressed.

Hope that helps

o5racer
Dirt Freak

Total posts: 402
posted May 05, 2004 10:19 PM  
Generally 11 inch springs are standard for metrics. Most of the metrics at our track are running 11 inch with maybe 1/4-1/2 inch shim on RF for crossweight. That usually puts the LF lower arm about level and the RF just a hair above.

And there is nothing wrong with using the torch to cut the end of a spring. Yes the heat will messup the tensile strength of the area where you cut it. But step back and look. the first 3/4 coil sits in the lower spring pocket and never flexes anyway.

supwitchew
Dirt Maniac

Total posts: 122
posted May 07, 2004 09:47 PM  
You would be correct. Just don't get carried away as previously stated.

racer17j
Dirt Forum Champ
Total posts: 5390
posted May 07, 2004 10:59 PM  
one thing about those stock springs even if you do cut them they aren't heavy enough to work right 100 for racing springs will pay off in the long run i used to run stock deisle spring cut down on the rf and stock v8 spring cut on the lf well needless to say the right rate would have saved me about $150 worth of tires and wheels when the front end started bouncing and blowing tires now that i spent the money i haven't had a flat on the rf in 3 years ( as i knock on the puter desk) lol

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