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Re: Assassin bars. [Re: HOTMOPR] #2722713
12/09/19 10:10 AM
12/09/19 10:10 AM
Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
an8sec70cuda Offline
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Marion, South Carolina [><]
FWIW...I'm on my second pair of mono leaf springs on my cuda. Bent the first set a few years back. Some of you may remember a member here by the handle "TheOtherDodge" who had a badass red '73 challenger, 499" big block on nitrous running low 9s. He bent springs on his w/ Cal-Tracs if I recall correctly before he switched to ladder bars.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Assassin bars. [Re: an8sec70cuda] #2722772
12/09/19 04:03 PM
12/09/19 04:03 PM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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BradH Offline
Taking time off to work on my car
BradH  Offline
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Val-haul-ass... eventually
I'd think that adding a short leaf section where the CalTrac link pushes down on the spring would add enough stiffness in that high-load area to help resist that bending problem.

Re: Assassin bars. [Re: BradH] #2722930
12/10/19 12:23 PM
12/10/19 12:23 PM
Joined: May 2005
Posts: 54
VA Beach, VA
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Runnoft Offline
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VA Beach, VA
On my other car I run Assassin bars with the SRC spring perches and Calvert Split Mono Leafs. The extra adjustments are nice but honestly I've never moved them since setting it up. The only thing I adjust is preload to keep the car going straight. I've been fast with them. Really fast.


Cruiser: 66 Dodge Coronet 500, Indy SR 440, Gen 7 Accel EFI = 11.38 @ 116.
Racing: Brand X, X275 Procharged Smallblock on M1, Leafsprings, Holley EFI = 4.30 @ 168

Re: Assassin bars. [Re: BradH] #2723127
12/10/19 11:32 PM
12/10/19 11:32 PM
Joined: Mar 2003
Posts: 9,092
Rogue River, OR
Jeremiah Offline
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Rogue River, OR
Originally Posted by BradH
I'd think that adding a short leaf section where the CalTrac link pushes down on the spring would add enough stiffness in that high-load area to help resist that bending problem.


Agreed. I used to clamp flat stock to the rear leaf segment of my car to keep the springs from bending. Took the clamps off for street driving and immediatley bent the longest spring forward of the rear hanger. 4 speeds are hard on stock springs!



Re: Assassin bars. [Re: Jeremiah] #2723184
12/11/19 09:30 AM
12/11/19 09:30 AM
Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
an8sec70cuda  Offline
I Live Here

Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
Now that I think of it...when mine bent, it was the rear half on the driver's side that bent...not the front section.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Assassin bars. [Re: an8sec70cuda] #2723194
12/11/19 10:22 AM
12/11/19 10:22 AM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
B
BradH Offline
Taking time off to work on my car
BradH  Offline
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
Originally Posted by an8sec70cuda
Now that I think of it...when mine bent, it was the rear half on the driver's side that bent...not the front section.

Is that part of what rear spring mount sliders are designed to help with?

I don't see how that sort of issue would be any different between CalTracs and Assassin bars, but I can see how bending the spring behind the front eye could result from CalTracs.

Re: Assassin bars. [Re: BradH] #2723206
12/11/19 11:05 AM
12/11/19 11:05 AM
Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
an8sec70cuda  Offline
I Live Here

Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
Originally Posted by BradH
Originally Posted by an8sec70cuda
Now that I think of it...when mine bent, it was the rear half on the driver's side that bent...not the front section.

Is that part of what rear spring mount sliders are designed to help with?

I don't see how that sort of issue would be any different between CalTracs and Assassin bars, but I can see how bending the spring behind the front eye could result from CalTracs.

I'm not sure about sliders helping w/ it or not? It definitely wouldn't be any different b/t the two styles of bars as far as bending the rear halves.
Looking at the two designs, I don't really see how the Assassin bars would be any less prone to bending the front half of the spring?


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Assassin bars. [Re: an8sec70cuda] #2723218
12/11/19 12:30 PM
12/11/19 12:30 PM
Joined: Jan 2003
Posts: 2,902
A shed in England
Tig Offline
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A shed in England
Originally Posted by an8sec70cuda
Originally Posted by BradH
Originally Posted by an8sec70cuda
Now that I think of it...when mine bent, it was the rear half on the driver's side that bent...not the front section.

Is that part of what rear spring mount sliders are designed to help with?

I don't see how that sort of issue would be any different between CalTracs and Assassin bars, but I can see how bending the spring behind the front eye could result from CalTracs.

I'm not sure about sliders helping w/ it or not? It definitely wouldn't be any different b/t the two styles of bars as far as bending the rear halves.
Looking at the two designs, I don't really see how the Assassin bars would be any less prone to bending the front half of the spring?

Maybe more so, IIRC you have to drill a hole in the leaf to mount the front pivot bracket with the Smiths stuff. shruggy.


'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: Assassin bars. [Re: Tig] #2723224
12/11/19 12:48 PM
12/11/19 12:48 PM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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BradH Offline
Taking time off to work on my car
BradH  Offline
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Val-haul-ass... eventually
I wasn't a great Physics student, but I'd a$$ume how the Assassin bar bracket clamps to the front leaf behind the spring eye distributes the load across a wider area of the leaf spring than the CalTrac "bolt" that pushes down in more of a point-loaded fashion. That's why I mentioned that a short leaf section clamped in that same area for a CalTracs-equipped car could help achieve the same thing.

Re: Assassin bars. [Re: BradH] #2723243
12/11/19 01:42 PM
12/11/19 01:42 PM
Joined: May 2011
Posts: 625
Oakville, Wa
HOTMOPR Offline
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Oakville, Wa
Ya the bracket distributes the pressure across a wider area.


67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
Re: Assassin bars. [Re: HOTMOPR] #2723259
12/11/19 03:24 PM
12/11/19 03:24 PM
Joined: May 2011
Posts: 625
Oakville, Wa
HOTMOPR Offline
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Oakville, Wa
Just talked to Digby. They have never bent to a set of springs. The have only broken the lockdown bolt. That's well over a 2000 pony combo..

4373806F-65AD-4A10-9A38-E7E4CC6B008E.jpeg

67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
Re: Assassin bars. [Re: HOTMOPR] #2723317
12/11/19 06:25 PM
12/11/19 06:25 PM
Joined: Aug 2011
Posts: 2,843
Pattison Texas
CSK Offline
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Originally Posted by HOTMOPR
Just talked to Digby. They have never bent to a set of springs. The have only broken the lockdown bolt. That's well over a 2000 pony combo..


Well there you go, I trust what they say !!!!


1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Assassin bars. [Re: CSK] #2723320
12/11/19 06:37 PM
12/11/19 06:37 PM
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Romeo MI
MR_P_BODY Offline
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And I would bet that it spins before it hooks up a dead hook applies more torque
wave

Re: Assassin bars. [Re: MR_P_BODY] #2723326
12/11/19 07:02 PM
12/11/19 07:02 PM
Joined: May 2011
Posts: 625
Oakville, Wa
HOTMOPR Offline
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Oakville, Wa
Originally Posted by MR_P_BODY
And I would bet that it spins before it hooks up a dead hook applies more torque
wave


it's a ET street drag radial tire.. It better dead hook or your fooked.

Last edited by HOTMOPR; 12/11/19 07:04 PM.

67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
Re: Assassin bars. [Re: HOTMOPR] #2723397
12/12/19 09:18 AM
12/12/19 09:18 AM
Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
an8sec70cuda Offline
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Posts: 13,319
Marion, South Carolina [><]
Originally Posted by HOTMOPR
Originally Posted by MR_P_BODY
And I would bet that it spins before it hooks up a dead hook applies more torque
wave


it's a ET street drag radial tire.. It better dead hook or your fooked.

iagree You HAVE to dead hook a radial. Once they spin, it's done.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Assassin bars. [Re: OhioMopar] #2725342
12/19/19 10:43 AM
12/19/19 10:43 AM
Joined: Aug 2003
Posts: 8,779
Mt.Gilead, Ohio
OhioMopar Offline OP
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OhioMopar  Offline OP
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Posts: 8,779
Mt.Gilead, Ohio
Wow, this thread really took off, and became a sales ad and critique of how great Cal-tracs are! Lol. Thanks to all that answered my questions. I have my Assassin bars and should be installing them tomorrow. I'll see how they like the springs that are on it before I jump to a monoleaf setup.


1969 Dart GTS 340
1969 Super Bee X9 N-96
1969 Coronet R/T X9 N-96
2015 Dodge Dart GT
2019 Ram 2500 Big Horn.
Looking for the original block for my Bee. The last 4 are 7449
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