Visit The Dirt Forum for More Information

Author Topic:   Pure Stock Suspension
sleepy21
Dirt Roller

Total posts: 6
posted February 18, 2005 08:32 AM  
I run a 1972 Chevelle in a Pure Stock class.
I replaced the right front spring with a spring from a big block Chevelle. The car is still way to soft. Anyone have any suggestions on how to stiffen this car up and still be legal (no racing springs). Is their a truck spring or some other vehicle with stiffer springs that I can use. Chevelle springs are 5 1/2" dia. by 12" long.I had spring rubbers in but I had to remove them per the rules.

powerglides
Dirt Freak

Total posts: 374
posted February 18, 2005 09:26 AM  
Afco stock replacement springs in any weight you want 12" long and painted black

mrteeshot
Dirt Maniac

Total posts: 127
posted February 18, 2005 11:00 AM  
the tech at my track explained to me they way HIS version of how to tell factory or factory replacement springs -

a factory spring or allowable replacement- at the factory is press-cut flat slightly smashed oval to them -

a racing spring has been cut then ground flat

so what i did with his approval was found a set from a 3/4 ton chevy van they have a 5 1/2 opening on bottom end then at the top it curls down to about 2 1/2 to 3 inches if this is in the way of what you have (and mine was) just grind/cut it back to the rest of coil then it will fit right back onto the pocket the 3/4 to 1 inch ya lose in hieght from cutting it ya make up for in the stiffness of the spring
(I never checked the spring rate kinda wish I did when I had em out )

big time improvement in handling

for the rears I used the rear springs from a big buick think it was an electra or a limited these springs were 1/16 thicker and just under 1 inch taller but a tight squeeze gettin em back in but I did it myself w/out a spring compressor

I run mostly on ashphalt but this should help ya out on what to get em from if ya need em and stay pure stock
http://chasinracin.com/cgi-bin/showpage.pl?ID=on_my_6

dirty58
Dirt Maniac

Total posts: 115
posted February 18, 2005 04:41 PM  
try some nissan p/u springs

The Flash32
Dirt Maniac

Total posts: 120
posted February 18, 2005 04:57 PM  
Are you using the sway bar on front?

doubletrouble racing
Dirt Forum Racer

Total posts: 88
posted February 18, 2005 10:11 PM  
Our rules read the same in the pure stock class.We got the "stock appearing" springs suppose to be same diameter as stock.A oldtimmer says BLACK is stock so I painted them black,rolled them around in the dirt,sand and gravel set them in the sun and put them up under the car.I overheard another driver and a tech talking about removing a spring for inspection.....the driver says it would put him and others in danger to attemp removing spring at the track without the proper equipment.The tech agreed and nothing eles was ever said about it.I think I will use the same story if they asked me to pull a spring out of our pure stock at the track.Another thing I learned from an oldtimmer was NEVER lend a tech your flashlight to tech your car.....yet ALWAYS offer your flashlight to the tech to tech someone eles car!!!!

petordragon
Dirt Maniac

Total posts: 167
posted March 08, 2005 07:07 PM  
carfule double revenge can be a ***** sometimes.

bryanb30
Dirt Freak

Total posts: 243
posted March 09, 2005 11:52 AM  
his rules say no racing springs!!!! why cheat? if you wanna use racing springs just move up to the next class, the lower classes are for lower budget guys, why ruin it for them? sleepy21 look around the junkyards and youll find a stock spring that will work for you somehow, and then when you pass those guys that are cheating you will have a bigger smile on your face than if you were cheating!! GOOD LUCK!!

Speedracer92
Dirt Full Roller

Total posts: 70
posted March 09, 2005 12:24 PM  
I use a front spring out of a big block 1970 pontiac catalina. Then i heated it up and shrunk a coil down to stiffen it up. Works perfect. I do have the sway bar on too though.

[This message has been edited by Speedracer92 (edited March 09, 2005).]

Steve Dupree
Dirt Freak

Total posts: 316
posted March 09, 2005 04:13 PM  
Hi there well dont heat the spring it does not help spring rate one thing you can do is look for a stock longer spring and cut it that will increase rate alot depending but heating doesnt creat more spring rate just lowers car and helps to have a spring bind later. We run a ford torino and they are the same diameter that you are looking for so you might try that. Cut them to the heighth you want and then go check them at your local speed shop.

jay116
Dirt Freak

Total posts: 428
posted March 09, 2005 06:24 PM  
I have used alot of different springs to do what you are doing. big Cadillac springs, Lincoln Continental, F100 trucks, whatever we found at the you pull it yard that met our measurement requirements as far as diameter and thickness, then just cut them to what we needed to get ride height and called it good. That was 20 years ago but would still be true today. Any parts stores that can read a catalog also has a listing in the back the gives spring rates and dimensions. At least Moog does you just gotta find someone that can read it. But if you find what you are after, then hit the local yard and search for that vehicle. I guess it was easier for me then, I was working at the parts store but there are a few good ones left that can do that for you.

supwitchew
Dirt Maniac

Total posts: 122
posted March 11, 2005 06:53 PM  
Mr. Dupree, that's not entirely true. If you heat a spring to the point where one coil collapses on another, it would be equivalent to cutting a coil. The 3 things that determine spring rate are the wire diameter, the diameter of the coil, and the number of active coils. I know this isn't the preferred method by the majority so cutting is probably still the best option.

Steve Dupree
Dirt Freak

Total posts: 316
posted March 12, 2005 06:20 AM  
Well Subwitchew I just wanted to give him the best way to achieve what he wanted and do it right. We use to heat are springs but very hard to get excactly what height you want or know just how much you increased the spring preasure. But i guess thats up to want you want Goodluck and i am sure he has enough info now to get the springs he needs.

crc1124
Dirt Maniac

Total posts: 143
posted March 12, 2005 09:08 AM  
I read in one of the Circle Track articles a couple of years ago that if you cut the spring it increases the spring rate. They suggested cutting a 1/2 coil at a time. I just can't remember how much the spring rate increased. They had it figured out I just don't remember. They also said that heating the springs was a bad idea because it just weakens the spring and makes it more prone to failure. I've seen springs crack and break where they were heated up. I'm sure the guy who did it got it to hot but how do you really know for sure?

[This message has been edited by crc1124 (edited March 12, 2005).]

supwitchew
Dirt Maniac

Total posts: 122
posted March 12, 2005 10:26 AM  
Mr. Dupree, you did give him the best way (outside of buying new springs. ). I meant nothing by my statement. I agree with you that cutting is much better than heating. The only reason I even said anything was because people on here rely on this information. It should be as accurate as possible. If you heat a spring and collapse it, it will increase the spring rate.

crc1124- Spring rate is directly proportional to the number of active coils (as long as it is not a progressive spring). If you reduce the number of active coils by half, you will double the spring rate. So if there were 5 active coils and you cut off half a coil, you would increase spring rate by 10%. Hope this helps.

Steve Dupree
Dirt Freak

Total posts: 316
posted March 12, 2005 07:10 PM  
We totally understand we love the help we get here from the dirt forum. Sorry i should have explained my self more in my statement. Talk at you soon fellow drivers and tahnks for all the help too.

Shess71
Dirt Roller

Total posts: 15
posted March 22, 2005 05:18 PM  
1993 chevy 3/4 ton front spring is what i used and we just cut 2 coils out to give the height we wanted hope this helps

racer17j
Dirt Forum Champ
Total posts: 5390
posted March 22, 2005 06:51 PM  
quote:
Originally posted by sleepy21:
I run a 1972 Chevelle in a Pure Stock class.
I replaced the right front spring with a spring from a big block Chevelle. The car is still way to soft. Anyone have any suggestions on how to stiffen this car up and still be legal (no racing springs). Is their a truck spring or some other vehicle with stiffer springs that I can use.Chevelle springs are 5 1/2" dia. by 12" long.I had spring rubbers in but I had to remove them per the rules.

is the rear end locked with a locker if not going into the corner every time you step on the trottle it will push and drop that spring if it is locked try putting every bit of wieght to the back,seat, battery ,and 22 gallon fuel cell you will have better luck scaling the car

Back to the Archives