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Topic: Is a SB 550lb coil spring the same spring as a BB 550lb coil spring

in Forum: C3 Handling Components


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Is a SB 550lb coil spring the same spring as a BB 550lb coil spring (1/6)
 6/7/14 11:03pm
Bobsdaytona
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Joined: 6/7/2014
Posts: 16

When I started my Daytona widebody conversion on my 1980 small block I had purchased and installed what the folks at Van Steele just called Big Block springs. I said I wanted to lower the front, so that's what they recommended.
Not sure what happened but now the nose is about 2 inches higher than it was before, making my vette looking like a vintage "gasser".
 
This time I ordered the SB 550lb springs from Ecklers and will be doing the install shortly.
 
Just generally curious if a small block 550lb coil spring is the same spring as a big block 550lb coil spring.


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1980 Daytona Wide Body - work in progress
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Re: Is a SB 550lb coil spring the same spring as a BB 550lb coil sprin (2/6)
 6/8/14 9:50am
Sarge81Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.


Joined: 12/3/2001
Posts: 2379

I believe the springs are coiled a little tighter on the big block spring to accommodate the extra 100 lbs. +/- 20 lbs. a big block weighs over a small block. 
I would think if you were to shave the extra weight off of a big block using aluminum parts like heads, water pump, intake and lose the cast iron exhaust manifolds you might be able to use SB springs. 

I put Eaton Detroit springs in my '81 vette back in '01 and they are still holding the car at 27" from the ground to center of the wheelwell. Eaton supplies most of the aftermarket vendors from what I've heard.


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Re: Is a SB 550lb coil spring the same spring as a BB 550lb coil sprin (3/6)
 6/8/14 11:43am
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
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A "big block" spring set would typically be taller than a "small block" spring set. The springs are rated for the designed installed height. Since a big block naturally weighs more, it would set the front of the car too low if the springs were not longer, and stiffer. Aftermarket stuff can be rated any way they want. I agree with Sarge on using the Eaton stuff. Eaton is the only manufacturer that GM has approved for replacement springs, and their stuff is made using the OE design specs, and in most cases, the original tooling.
Do you plan on doing some serious racing with the car? 550 pound front springs on a small block car is gunna be brutal for a street car!

|UPDATED|6/8/2014 8:43:37 AM (AZT)|/UPDATED|


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Re: Is a SB 550lb coil spring the same spring as a BB 550lb coil sprin (4/6)
 6/8/14 12:26pm
gellisvetteLifetime Member
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PERRYSBURG, OH - USA

Vette(s):
1975 T-Tops,Lite Custom work,Many engine mod. 700R4 trans. body is shaved,17" wheels bf goodrich g-force tires,heavy sway bars front&rear rack&pinion steering,550 slolom springs with gas shocks.


Joined: 4/23/2004
Posts: 317

I used VBP 550lb. on my car several years back. They fit perfectly and never have had a problem. They ride a little stout and I run Bilstin shocks. Drives like it's on rails. ps I got a set of 550 springs from one of the major supply co. and ran into the same problem your having. Just saying. Also VBP springs dropped the front of my car about 1 1/2". Hope this helps. George Thumbs Up

Re: Is a SB 550lb coil spring the same spring as a BB 550lb coil sprin (5/6)
 6/8/14 10:19pm
Bobsdaytona
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Posts: 16

First... thanks for all the coil spring info and personal experiences.
I got a late start today, but did manage to install the drivers side coil spring.
On Friday a friend of mine from work lendt me his coil compression tool he uses on his 68 Camaro. After pulling off the wheel I immediately realized outside the coil compression tool was not going to work. Plan "B" was to use a floor jack under the lower A frame and chain the coil to the Lower A frame with a good size chain. I called over a neighbor who happens to own an auto garage but really I just wanted him around if plan "B" went terribly wrong.
Turns out it was really pretty simple especially since the Big Block springs that had been installed previously were shorter than stock so they basically had no tension on them and fell out. I took side by side pictures of the Big Block spring and the new 550lb Gymkhana. I'll try to post it sometime this week, but basically the Gymkhana is about 1.5 inches or so shorter, so hopefully I'll get the 3 inch drop I'm looking for... or it looks like it's "cutting time".
 
Just out of curiousity I went back onto Van Steele web site and did a search on the part number of the BB coil springs I had originally purchased from them. Interesting enough there is a note in the details stating that installing BB springs in your small block will lower the stance as they recommended to me. So this one's still a mystery... Perhaps they were installed improperly...? I won't be able to see the full affect of swapping to the Gymkhana's until I get both installed.
 
I have no intention to race this car, but I wanted it to sit lower without tearing up the Daytona front nose and side ground effects panels. I figured it's going to be a stiff ride, hopefully it wanted be too bad.


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1980 Daytona Wide Body - work in progress
Re: Is a SB 550lb coil spring the same spring as a BB 550lb coil sprin (6/6)
 6/24/14 7:28pm
7t9l82
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melbourne, FL - USA

Vette(s):
79 L-82


Joined: 6/9/2014
Posts: 23

i have the VBS 550 springs with 3/4 of a coil cut out with QA1 shocks and it rides very well and handles great.

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