VBP front monospring rate?
Thread Starter
The ORIGINAL and bestest
Joined: Oct 2000
Posts: 10,009
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From: Toronto Ontario
Toronto Events Coordinator
VBP front monospring rate?
I have a VBP front monospring kit I just installed, and I believe that they sent me a spring meant for racing instead of street driving because no matter which adjustment I use, the spring rate seems too high. On one end of the spring, it is written: "TVL-740" which VBP has confirmed is the spring rate. I have their complete "advanced street/slalom" kit on the car which came with 550lb front springs, and with this new monospring installed, it is very obvious that the spring rate is much higher no matter where I adjust it to.
My question is: take a look at your monospring for me and tell me what the spring rate is; I am not getting all the answers to my questions from VBP, so this is why I am asking here.
My question is: take a look at your monospring for me and tell me what the spring rate is; I am not getting all the answers to my questions from VBP, so this is why I am asking here.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
I can take a look at mine tomorrow but I had just the oppisite on my rear dual mount spring. It was to soft. I had it set on the firmest setting and it would still bottom out. I called and gave them the numbers. They confirmed it was a softer spring and sent me out one the the more firmer springs. It made a huge difference. I run on the 3rd setting and it is firm. If I want a softer ride I just go to the 2nd setting. I have not had it on the 4th setting yet.
I jus tlooked at mine. The best I can see with a mirror and bad lighting is K-643. I assume it is 643 pound spring which would be quite a bit lighter than yours. I run mine at 2nd or 3rd setting and it is plenty firm.
I jus tlooked at mine. The best I can see with a mirror and bad lighting is K-643. I assume it is 643 pound spring which would be quite a bit lighter than yours. I run mine at 2nd or 3rd setting and it is plenty firm.
Last edited by Gordonm; Mar 24, 2008 at 10:14 PM.
Thread Starter
The ORIGINAL and bestest
Joined: Oct 2000
Posts: 10,009
Likes: 240
From: Toronto Ontario
Toronto Events Coordinator
Thanks for taking a look for me and reporting back.
I am going to ask VBP to send me a lighter rate spring to replace it. I don't know why they would send me such a high rate spring in the first place!
I just want a spring that closely replicates the 550 lbs coils I had in there when in the middle adjustment position so I can play with the rate both ways. Any problems otherwise with the monospring that I should know about?
I am going to ask VBP to send me a lighter rate spring to replace it. I don't know why they would send me such a high rate spring in the first place!
I just want a spring that closely replicates the 550 lbs coils I had in there when in the middle adjustment position so I can play with the rate both ways. Any problems otherwise with the monospring that I should know about?
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
None that I have had. It is real nice to be able to adjust the ride height and spring rate in a matter of minutes now. It rides smoother and I really like it. The only issue I have which is not really an issue at all is, when I put it on the lift and the suspension hangs the bolts are loose in the spring. When I go put it on the ground it kind of groans and makes a little noise until the suspension settles. See I told you it was not an issue.
The rear does tha talso with the dual rate system back there. VB was real good about exchanging my spring.
Thread Starter
The ORIGINAL and bestest
Joined: Oct 2000
Posts: 10,009
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From: Toronto Ontario
Toronto Events Coordinator
One thing I just noticed is that the steering stops on the control arms look much bigger than the stock ones, do they decrease the turning radius? I have my car in the air right now doing other work, so I can't check it out yet.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Ding Ding Ding!
You are exactly right. I did a post on this a week or so ago. Yes it is decreased. Just trim the stops back a little and your turning will go back to normal again.
Here is the post with some pictures.
http://forums.corvetteforum.com/show...turning+radius
Thread Starter
The ORIGINAL and bestest
Joined: Oct 2000
Posts: 10,009
Likes: 240
From: Toronto Ontario
Toronto Events Coordinator
Ding Ding Ding!
You are exactly right. I did a post on this a week or so ago. Yes it is decreased. Just trim the stops back a little and your turning will go back to normal again.
Here is the post with some pictures.
http://forums.corvetteforum.com/show...turning+radius
You are exactly right. I did a post on this a week or so ago. Yes it is decreased. Just trim the stops back a little and your turning will go back to normal again.
Here is the post with some pictures.
http://forums.corvetteforum.com/show...turning+radius
Out of curiosity I ran the spring bolts all the way down to see how low the front would go, and it went to 26 1/2" ground to fender, but that left almost no travel between the frame and the bump stop.....is it advisable to trim the bump stops to gain back some suspension travel if I want to roll that low? Or is that asking for problems?
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Melting Slicks
Joined: Dec 1999
Posts: 2,116
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From: Mid West
Cruise-In III Veteran
Great link! I thought those stops looked too big! I think I will start off by cutting 1/4" and go from there.
Out of curiosity I ran the spring bolts all the way down to see how low the front would go, and it went to 26 1/2" ground to fender, but that left almost no travel between the frame and the bump stop.....is it advisable to trim the bump stops to gain back some suspension travel if I want to roll that low? Or is that asking for problems?
Out of curiosity I ran the spring bolts all the way down to see how low the front would go, and it went to 26 1/2" ground to fender, but that left almost no travel between the frame and the bump stop.....is it advisable to trim the bump stops to gain back some suspension travel if I want to roll that low? Or is that asking for problems?
I didn't trim mine, but I did drill a hole thru it to soften it a bit. Then I lowered the shocks in the a-arms using spacers.
