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Old 03-02-2016, 10:13 PM   #1
GMCshorty
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rear springs with caltracs

Hey everyone. For those of you running Caltracs, are you running the split monos or a multipack? If so, what spring rate for the multipack? I have a 71GMC short box with big block and a 4 speed and hoping I can get it to hook. Its a street truck but might see the track a bit. It has a 12 bolt with 3.42s. Thanks, Troy.
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Old 03-05-2016, 10:51 PM   #2
pistonbroke800
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Re: rear springs with caltracs

Quote:
Originally Posted by GMCshorty View Post
Hey everyone. For those of you running Caltracs, are you running the split monos or a multipack? If so, what spring rate for the multipack? I have a 71GMC short box with big block and a 4 speed and hoping I can get it to hook. Its a street truck but might see the track a bit. It has a 12 bolt with 3.42s. Thanks, Troy.
I'm dong a bunch of work to my suspension right now and Caltracs are part of the project. I am going to be using the stock springs that are 3 leafs and the over load. I'm hoping with good shocks and 325/50R15 M/T's it will hook my 496 TH400 3:73's.
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Old 03-06-2016, 09:31 AM   #3
HAULIN' IT
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Re: rear springs with caltracs

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Originally Posted by pistonbroke800 View Post
I am going to be using the stock springs that are 3 leafs and the over load. I'm hoping with good shocks and 325/50R15 M/T's it will hook my 496 TH400 3:73's.
This is what I have except I have removed the overload.

I have been using stock type springs for about 8 years...I'm needed to replace my 3rd pair. The first (originals) broke...I blamed it on being old & scared to death, the replacements bent & so has the set that is on there now. I have purchased the parts to make an anti-roll bar which seems to be the problem. The main Right spring seems to flatten out & the Left one kinks toward the front. At some point I may go to the split mono's.

My advice, If you are going to use multi leafs & are going to the track with sticky tires...do the anti-roll bar now. Lorne

It goes 1.56-8 60' times. You can see some rollin' over going on.

Here's from the other side of the track...you can see the whole rear tire in the wheelwell
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Old 03-07-2016, 09:15 AM   #4
djracer
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Re: rear springs with caltracs

We ran split monos on my friends 67 Camaro and had 1.42 60ft on a 200 shot progressive with a 275 60 15 drag radial
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Special Thanks to All who have helped on the TRUCK!

My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4

So Far my best Times are:

Motor only:
6.44 1/8 @ 104.13
10.39 1/4 @ 125.83

Nitrous Times:
5.785 1/8 @ 118.65 with a 1.336 60ft
9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!
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Old 03-07-2016, 12:14 PM   #5
hotrod 80
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Re: rear springs with caltracs

The split monos fix the bending problem . The front half is very thick and the rear section is actually the spring rate portion .
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