Re: a body caltrac setup help
[Re: duspan]
#2588966
12/08/18 08:42 AM
12/08/18 08:42 AM
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Joined: Jan 2003
Posts: 2,937 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,937
A shed in England
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Depends on weight and HP, a heavy car has more mass to move and with a hi HP engine, it will work the suspension system more, requiring more extension control. Front end suspension travel is important, this helps the weight transfer to the back wheels and also helps control suspension rise. This what I've found, it's an E Body but the principle is the same. Watch what the car is doing, slo mo video helps a bunch and adjust from there. Good shocks (front and rear) with at least 5 inches of front suspension upward travel, starting on the bottom hole with equal preload (set with someone of similar weight in the driver seat) Again watch what the car does, wheelie, spin, porpoise or move left / right and again adjust accordingly. You may get the car to run perfectly first time out but in my experience it takes some tuning and understanding on how stuff works. All cars are different and changes to the combo will effect how the car reacts, again this is what i have found. HTH's
'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
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Re: a body caltrac setup help
[Re: duspan]
#2589095
12/08/18 06:40 PM
12/08/18 06:40 PM
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Joined: Jan 2003
Posts: 42,714 Spokane Washington
ScottSmith_Harms
Mr Wizzard
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Mr Wizzard
Joined: Jan 2003
Posts: 42,714
Spokane Washington
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Mine uses A-body length springs but in a B-body.
I use the lower hole for the bars and no preload but just touching the top of the spring.
On the shocks, I use the Rancho/Calvert 9 position shock set on 7 to control extension. Before, with regular shocks it would porpoise badly.
On the front I use 90/10 CE shocks and removed the upper control arm bumper for more extension. I installed the same exact parts in my 71 Demon, all supplied by Calvert. A-body mono leaves, Rancho 9 ways (set on 5) 90/10 CE's up front, Dana 60 w 3.73 gears, frame connectors, stock front suspension minus the sway bar. Switched from MT Drag Radials to 26x10.5 MT ET Street R bias ply tires (4 speed car, likes the bias plys). It hooks like a beast on the street.
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Re: a body caltrac setup help
[Re: duspan]
#2589724
12/10/18 04:03 AM
12/10/18 04:03 AM
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Joined: Apr 2005
Posts: 100 ma.
duspan
OP
member
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OP
member
Joined: Apr 2005
Posts: 100
ma.
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72 duster 3550lbs. with me qa1 front 5" of travel shocks 90/10 rancho rear shocks 33x19.5-15 mickey pros tires dana 60 4.56 gears 600hp prochargerd small block 727 trans 4300 ptc converter foot brake car...where to start set-up?
thanks
Last edited by duspan; 12/10/18 04:04 AM.
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Re: a body caltrac setup help
[Re: duspan]
#2589734
12/10/18 05:49 AM
12/10/18 05:49 AM
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Joined: Jan 2003
Posts: 2,937 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,937
A shed in England
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72 duster 3550lbs. with me qa1 front 5" of travel shocks 90/10 rancho rear shocks 33x19.5-15 mickey pros tires dana 60 4.56 gears 600hp prochargerd small block 727 trans 4300 ptc converter foot brake car...where to start set-up?
thanks Slicks or treads ?
'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
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Re: a body caltrac setup help
[Re: duspan]
#2591167
12/13/18 02:15 AM
12/13/18 02:15 AM
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Joined: Jul 2012
Posts: 25 Santa Rosa, Calif
angleiron2
member
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member
Joined: Jul 2012
Posts: 25
Santa Rosa, Calif
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69 Dart 315/60-15 M/T Pro Street Radials DOT, 4.10 gears, 3500 pounds. Caltracs top hole with Viking D/A set at 6 reboundand 14 compress.The t60 ft was 1.38 with quarter mile 9.8s We slowed the car up by taking the hood seal off and adding some weight and it 60 foots around 1.43 consistently and runs 10.0 or 10.1s. It’s street driven some, with a 440/512. The single adjustable Calvert shocks didn’t work for my car. I changed to the D/A shocks in th rear and it made a world of difference. That’s footbraking.
Last edited by angleiron2; 12/13/18 02:20 AM.
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Re: a body caltrac setup help
[Re: duspan]
#2591170
12/13/18 02:32 AM
12/13/18 02:32 AM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
master
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master
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
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dot, street tires, i drive it on the street. street legal car is this car mostly Street driven..?
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: a body caltrac setup help
[Re: duspan]
#2591714
12/14/18 11:10 AM
12/14/18 11:10 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Just remember to video every run.. get the video from a quartering angle from the rear so you can see the whole side of the car.. you will learn more from a good video than you will by guessing whats happening.. keep trying even when you think you have it right.. good luck
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Re: a body caltrac setup help
[Re: duspan]
#2591980
12/14/18 06:46 PM
12/14/18 06:46 PM
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Joined: Sep 2005
Posts: 1,553 baldwinsville new york
a493demon
pro stock
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pro stock
Joined: Sep 2005
Posts: 1,553
baldwinsville new york
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I had mine with a 1/16 gap with Afco DA rear shocks and the cal 90/10s on the front . Foot braking .
Last edited by a493demon; 12/15/18 03:28 PM.
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