Rear Composite Monospring Kit
Thread Starter
Pro
Joined: Nov 2004
Posts: 677
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From: Frisco TX
Rear Composite Monospring Kit
I was thinking about getting one of the VB&P Rear Composite Monospring Kit for my 76. Right now I have the stock springs and since I am about replace a few parts under the car. I was going to see about changing this out as well.
So... When I look a the sale I see that there are many spring rates to choose from. What are the differences between the springs? What is going to be better for me if I am putting in a bigger and stronger motor?
Tim
So... When I look a the sale I see that there are many spring rates to choose from. What are the differences between the springs? What is going to be better for me if I am putting in a bigger and stronger motor?
Tim
Le Mans Master
Joined: Sep 2000
Posts: 9,078
Likes: 7
From: DFW TX
Cruise-In VII Veteran
St. Jude Donor '07
Tim, I have the 330 lb under mine and it is a nice solid ride. Ride height is taller, so you have to use the longer bolts in most cases.
No track test results yet.
No track test results yet.
Last edited by Budman68; Nov 20, 2005 at 08:58 AM.
Race Director
Joined: Oct 2002
Posts: 12,065
Likes: 2
From: Smalltownville Michigan
Cruise-In 5, 6 & 10 Veteran
St. Jude Donor '09
i thought about the composite but went with the steel spring instead. got almost 27 years out of it..just couldnt justify the price difference to myself..
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
I am running the 330 rear spring also. A lot depends on what front springs you have. The 460 front and 330 rear is what is recomended with the 550 front 360 rear for heavier use. This matches the F41 suspension. The 300 lb spring is for the standeard front springs.
Burning Brakes
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
OK..let me just go one step further...lets say I want to replace the stock spring with a mono that would equal the stock spring...what would that be? (sorry about stealing the thread 
)
)
Burning Brakes
Joined: Oct 2002
Posts: 1,040
Likes: 109
Originally Posted by kb2fzq
OK..let me just go one step further...lets say I want to replace the stock spring with a mono that would equal the stock spring...what would that be? (sorry about stealing the thread )
)The stock spring in what ??
Burning Brakes
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
Originally Posted by Budman78
Tim, I have the 330 lb under mine and it is a nice solid ride. Ride height is taller, so you have to use the longer bolts in most cases.
No track test results yet.
No track test results yet.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Originally Posted by Gordonm
I am running the 330 rear spring also. A lot depends on what front springs you have. The 460 front and 330 rear is what is recomended with the 550 front 360 rear for heavier use. This matches the F41 suspension. The 300 lb spring is for the standeard front springs.
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Burning Brakes
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
yeah...I don't worry about squat..OR 12 sec 1/4's...this car is a top ender with the 3.70 rear...fast off the line?? Not in anybody's imagination..nope...my only concern is, when I put the back Bilstiens on, the spring leafs spread out when jacked up...kind of scared me..so figure I'd replace it with a mono when the warm weather arrives in the spring...I'm just trying to get a mono replacement that would be closest to stock..
Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
Originally Posted by gkull
I'll take this explaination a step further. Also buy the rear Smart Struts. IMO even the 360 rear causes to much squat once you exceed low 12 second quarter miles.
The stock spring replacement is the 300 lb spring. The 3.70 rear is definitly not a top end gear. That is a fairly steep gear for acceleration. A top end gear is a 2.73 or maybe a 3.08 gear.
Burning Brakes
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
Well...I've been told I have a 3.70...I don't know for sure...all I know, it isn't a neck snapper off the line...I make most of my acceleration speed after second gear (auto)..but you answered the question...300 lb spring is the number I'm looking for...thanks..
Le Mans Master
Joined: Sep 2000
Posts: 9,078
Likes: 7
From: DFW TX
Cruise-In VII Veteran
St. Jude Donor '07
Originally Posted by gkull
I'll take this explaination a step further. Also buy the rear Smart Struts. IMO even the 360 rear causes to much squat once you exceed low 12 second quarter miles.
Pro
Joined: Apr 2005
Posts: 603
Likes: 2
From: Illinois, USA
Originally Posted by RocketSapp
I was thinking about getting one of the VB&P Rear Composite Monospring Kit for my 76. Right now I have the stock springs and since I am about replace a few parts under the car. I was going to see about changing this out as well.
So... When I look a the sale I see that there are many spring rates to choose from. What are the differences between the springs? What is going to be better for me if I am putting in a bigger and stronger motor?
Tim
So... When I look a the sale I see that there are many spring rates to choose from. What are the differences between the springs? What is going to be better for me if I am putting in a bigger and stronger motor?
Tim
I put the monospring kit into my '77 which is very similar to the 76 and I love it. I went with the 550# and 360# rear because my car had a lot of body lean and just felt crappy through corners. I had a stock 77 suspension before that (300# fronts, and whatever the 9-leaf was with no rear anti-roll bar).
Now, the ride is more harsh in that bumps feel kinda punchy through the car. However, the upside is that none of the bumps I have hit so far have "upset" the vehicle. On most cars the bumps upset the vehicle and it takes a bit for it to "settle" -- but I don't have that issue at all. Further, when I corner, the thing feels like it's on rails.
This was a design consideration for me, so I went tougher on purpose -- and I like the results. I wanted my vette to behave like a sports car, not just one that look kinda pretty (and it does that too).
(For the real entusiasts, don't forget that going to the monospring will cut probably 30# of weight off the car ...ever increasing the power to weight ratio)
I hope that helps.
Brian.
Intermediate
Joined: Feb 2005
Posts: 37
Likes: 0
From: St. Peters Missouri
Rear Composite Spring
I have a 75 that I put the 330# spring in and it made a huge improvement in ride and handling. I'm not a suspension expert but if you are worried about body lean, you should upgrade to larger sway bar and also add the rear sway bar which is a simple bolt in operation. I did that to my 75 and our 70, and they now take the turns with no body sway. You get the best of both worlds, better ride, and improved cornering.
If you have any concerns, talk to someone at VB. They know their stuff.
If you go to the new spring, be sure to put on the rear shocks that they sell to go with the composite spring or you will have a bouncy ride.
I have the 330# in our 75, the 330# in our 70 SB, and the 360 in our 69 BB. Very happy with them.
If you have any concerns, talk to someone at VB. They know their stuff.
If you go to the new spring, be sure to put on the rear shocks that they sell to go with the composite spring or you will have a bouncy ride.
I have the 330# in our 75, the 330# in our 70 SB, and the 360 in our 69 BB. Very happy with them.
Drifting
Joined: Nov 2001
Posts: 1,469
Likes: 6
From: 68 427 4.11s Roadster
Not mentioned is the dual mount springs. You can adjust them to get what you want and being dual mount eliminates the sway bar.
Negatives is they cost money and you need to remove the crossbar to install them.
Negatives is they cost money and you need to remove the crossbar to install them.
Safety Car
Joined: Oct 2004
Posts: 3,926
Likes: 739
From: Youngstown Ohio
Originally Posted by Budman78
I feel like the back is steering the car way to much on hard launches. If you watch the video in my sig you can see how lite the front gets. My plan is to buy a set of the QA1 adjustable rear shocks to match the front and maybe the smart struts.
