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Caltracs A or B body front segment #3063120
07/27/22 08:54 PM
07/27/22 08:54 PM
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Wisconsin
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StageIII Offline OP
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I got a 1967 coronet with 002 & 003 springs on it. Thinking about switching over to Caltracs. Should I run A body Caltracs springs which have a 20” front segment or the B body 22” front segment? Talked to Calvert today and they said it really didn’t matter???

Re: Caltracs A or B body front segment [Re: StageIII] #3063123
07/27/22 09:07 PM
07/27/22 09:07 PM
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Chesterfield Twp. Mi.
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John Burdine Offline
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I would opt for the longer 22" springs.

Re: Caltracs A or B body front segment [Re: John Burdine] #3063140
07/27/22 09:53 PM
07/27/22 09:53 PM
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So Near, Yet So Far
topside Offline
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002/003 have the 20" ft segment, so on that car the front hangers are longer to work with them.
Shorter ft segment is less susceptible to "wrap" than a longer segment IF all else is equal.
On a Cal-Trac setup, I don't know if segment length matters, as the way I understand it, the bar is doing more of the work.
Everyone with Cal-Tracs seems to like them better than the SS springs.

Re: Caltracs A or B body front segment [Re: John Burdine] #3063154
07/27/22 11:40 PM
07/27/22 11:40 PM
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GomangoCuda Offline
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Originally Posted by 493_john
I would opt for the longer 22" springs.

Agree. Some of the really fast caltrac mopars have been modified to use Chevy length springs. I suppose the instant center moves forward along with the spring eye.


In theory, there is no difference between theory and practice. In practice, there is.
Re: Caltracs A or B body front segment [Re: GomangoCuda] #3063205
07/28/22 08:25 AM
07/28/22 08:25 AM
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Wichita
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GY3 Offline
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We run the 20" front segment in our '63 B-body.

They work fine.

Unless it's an all out effort and you're going for every last 1/10 of a second, I'd leave the longer hangers in there and just do the 20" segment leaf.


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

Re: Caltracs A or B body front segment [Re: GY3] #3063207
07/28/22 08:38 AM
07/28/22 08:38 AM
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Ontario, Canada
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Stanton Offline
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I think the front CalTrac segment provides very little flex, that's left to the rear segment. The front segment acts like the top bar in a 4-link or ladder bar ... very rigid.

Quote
I'd leave the longer hangers in there


CalTracs come with new hangers. Unless you were specific, the shorter front segments would come with standard front hangers and as a result the rear end would have to move forward to line up with the locator pin. Life would be simpler if you ordered the kit specific for the car.

Re: Caltracs A or B body front segment [Re: StageIII] #3063208
07/28/22 08:45 AM
07/28/22 08:45 AM
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A shed in England
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If I was starting from scratch I'd go to 22" front segment but we have our's working OK with a 20"
[Linked Image]


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Re: Caltracs A or B body front segment [Re: Tig] #3063295
07/28/22 01:32 PM
07/28/22 01:32 PM
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Rogue River, OR
Jeremiah Offline
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On a B car I used a SS spring hanger to move the axle back in the wheel well and retained the 22" from segment by relocating the rear leaf spring attachment point (in this case roller sliders).



Re: Caltracs A or B body front segment [Re: GomangoCuda] #3063312
07/28/22 02:19 PM
07/28/22 02:19 PM
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north of coder
moparx Offline
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Originally Posted by GomangoCuda
Originally Posted by 493_john
I would opt for the longer 22" springs.

Agree. Some of the really fast caltrac mopars have been modified to use Chevy length springs. I suppose the instant center moves forward along with the spring eye.



aren't chevy length springs 50/50 length segments ? shruggy
beer

Re: Caltracs A or B body front segment [Re: moparx] #3063316
07/28/22 02:23 PM
07/28/22 02:23 PM
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MN
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On a CalTrac setup, the longer the front segment of leaf spring, the better. IMO.


69 GTX 68 Road Runner
Re: Caltracs A or B body front segment [Re: moparx] #3063317
07/28/22 02:24 PM
07/28/22 02:24 PM
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Originally Posted by moparx
Originally Posted by GomangoCuda
Originally Posted by 493_john
I would opt for the longer 22" springs.

Agree. Some of the really fast caltrac mopars have been modified to use Chevy length springs. I suppose the instant center moves forward along with the spring eye.



aren't chevy length springs 50/50 length segments ? shruggy
beer


Yes. So are Fords. Just like CalTracs were originally designed for.


69 GTX 68 Road Runner
Re: Caltracs A or B body front segment [Re: JERICOGTX] #3063349
07/28/22 03:48 PM
07/28/22 03:48 PM
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Tulsa OK
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My car is an A body with the 20" segment. I have wondered about making the change to the 22". Low 1.4 60s but it crushes the tire even with my shocks 1 click away from full stiff. It unloads the tire a little bit at 8' out. I am relocating my lower shock mounts to stand the shock up a little more in hopes of gaining some more control without buying new shocks or springs.

Last edited by Bad340fish; 07/28/22 04:54 PM.

68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Caltracs A or B body front segment [Re: JERICOGTX] #3063352
07/28/22 04:07 PM
07/28/22 04:07 PM
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CA
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Originally Posted by JERICOGTX
On a CalTrac setup, the longer the front segment of leaf spring, the better. IMO.


^^^^ THIS!!!

Re: Caltracs A or B body front segment [Re: StageIII] #3063375
07/28/22 05:05 PM
07/28/22 05:05 PM
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Bend,OR USA
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Do you want to move the rearend rearward by two inches by using the longer B body style leaf springs?
If not don't use them tsk work
The tech at Cal Tracks should know better to tell you that two inches longer it doesn't matter, shame on him down(maybe he should ask his girlfriend about two inches longer mattering or not whistling devil: grin:)


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Caltracs A or B body front segment [Re: Cab_Burge] #3063394
07/28/22 06:14 PM
07/28/22 06:14 PM
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Melbourne , Australia
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The GM guys run the 24" orthe S-10 25" front segment. If it will fit, run the longer 22" front segment


Alan Jones
Re: Caltracs A or B body front segment [Re: Tig] #3063396
07/28/22 06:28 PM
07/28/22 06:28 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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I never noticed the wind turbine sticking out of the hood before.

Hybrid with supplemental wind power??

590CF3D7-8B8A-476C-897F-F1E78C2BE0A4.jpeg

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Caltracs A or B body front segment [Re: fast68plymouth] #3063401
07/28/22 06:56 PM
07/28/22 06:56 PM
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A shed in England
Tig Offline
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Originally Posted by fast68plymouth
I never noticed the wind turbine sticking out of the hood before.

Hybrid with supplemental wind power??


grin Anything for an extra 10th grin


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Re: Caltracs A or B body front segment [Re: Cab_Burge] #3063407
07/28/22 07:18 PM
07/28/22 07:18 PM
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GomangoCuda Offline
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Originally Posted by Cab_Burge
Do you want to move the rearend rearward by two inches by using the longer B body style leaf springs?
If not don't use them tsk work
The tech at Cal Tracks should know better to tell you that two inches longer it doesn't matter, shame on him down(maybe he should ask his girlfriend about two inches longer mattering or not whistling devil: grin:)

Uh, he has a b body so all he has to do to use b body springs is put the stock hangers back on. No change in rear end location.


In theory, there is no difference between theory and practice. In practice, there is.
Re: Caltracs A or B body front segment [Re: JERICOGTX] #3063443
07/28/22 09:09 PM
07/28/22 09:09 PM
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Iirc Toothjerker still runs a 20” front

Re: Caltracs A or B body front segment [Re: SLO-KID] #3063457
07/28/22 09:55 PM
07/28/22 09:55 PM
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Oakland, MI
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dizuster Offline
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Getting the shock right will have way more impact than the 20" or 22" length.

They make a 21" too, that's what's on my 62 Savoy.

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