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Re: CalTracs setup - Chassis separation or limit it? [Re: WHITEDART] #2578059
11/13/18 07:52 PM
11/13/18 07:52 PM
Joined: Aug 2003
Posts: 4,662
On the parachute mount
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n20mstr Offline
master
n20mstr  Offline
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Joined: Aug 2003
Posts: 4,662
On the parachute mount
Originally Posted By WHITEDART
Originally Posted By BradH
Quote:
your comparing apples to oranges

Understood. But I wasn't sure how much of this was because a radial tire works better w/ the chassis tuned differently than a bias-ply, or because of all those other variables like HP, etc.
.. correct me if I'm wrong but aren't most stalkers running a radial now.. I think the original reason for the Post was just to show that cars can hook and go fast without pulling the front wheels off the ground.. we hit our car with everything that we can on the starting line. . it has been quite the adventure getting the car to work without all the rotation.. I myself have asked many questions on this forum regarding.. rotations.. I have found the most important thing is controlling the rear end of the car.. if it separates too quickly it will Top out and unload the tire.. if it's too slow it will never hook.. has kind of been a science project of mine on my car..




? stalker? if that's directed towards me, I think not

5.10 @ 140 on a 275, no wheelstand. I think im qualified to comment, and yea your correct about controlling the rear. Smash the tire and hold it there. If I give Brad a hard time....he knows where im coming from.


reading is fundamental....you meant "stocker" not "stalker"....I guess I should read more..LMAO ! ! !

Last edited by n20mstr; 11/13/18 07:59 PM.

....BAD A$$ STREET CAR.....
Re: CalTracs setup - Chassis separation or limit it? [Re: n20mstr] #2578067
11/13/18 08:23 PM
11/13/18 08:23 PM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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BradH Offline OP
Taking time off to work on my car
BradH  Offline OP
Taking time off to work on my car
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Posts: 15,439
Val-haul-ass... eventually
Originally Posted By n20mstr
... If I give Brad a hard time....he knows where im coming from.

Yep.

Re: CalTracs setup - Chassis separation or limit it? [Re: BradH] #2578092
11/13/18 09:10 PM
11/13/18 09:10 PM
Joined: Jan 2003
Posts: 14,478
So. Burlington, Vt.
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fast68plymouth Offline
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So. Burlington, Vt.
I’d say...... about this much seems to work pretty good:

CE267087-8B15-4247-92EA-7A92D8E256DE.jpeg

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: CalTracs setup - Chassis separation or limit it? [Re: BradH] #2578167
11/13/18 11:31 PM
11/13/18 11:31 PM
Joined: Oct 2003
Posts: 842
Baltimore,MD
Bill_LBSR Offline
super stock
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Posts: 842
Baltimore,MD
I'd recommend you run the best double adjustable shock you can afford and the same for the front. I run Menscer Big Gun Afcos and Cal Tracs with M/T Pro 275s. I try to keep the rear separation to a minimum at launch.

Re: CalTracs setup - Chassis separation or limit it? [Re: BradH] #2578288
11/14/18 10:57 AM
11/14/18 10:57 AM
Joined: Jan 2003
Posts: 2,289
NE Ohio
DoubleD Offline
top fuel
DoubleD  Offline
top fuel

Joined: Jan 2003
Posts: 2,289
NE Ohio
Yep just a little will do ya!

IMG_2026.jpg
Re: CalTracs setup - Chassis separation or limit it? [Re: DoubleD] #2579549
11/17/18 01:57 PM
11/17/18 01:57 PM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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BradH Offline OP
Taking time off to work on my car
BradH  Offline OP
Taking time off to work on my car
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
I don't have the video a friend took years ago, or any pics from when people were telling me it was pulling the fronts 4-6". What I do know is the Ranchos were on #4 of 5 (one click from stiffest), and I raised the tire pressure after 440Jim pointed out that I was squishing the sidewalls too much. The rebound setting on the front dampers should have been tightened up some to see if I could keep the front suspension from topping out so hard on the launch without hurting the 60-ft, too.

Re: CalTracs setup - Chassis separation or limit it? [Re: BradH] #2580220
11/19/18 03:09 PM
11/19/18 03:09 PM
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
Biginchmopar Offline
pro stock
Biginchmopar  Offline
pro stock

Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
The goal is to get to 100% Anti-Squat. This means trying to keep the rear wheel neutral during the launch. If you have a light big power car you need to control the front end lift with wheelie bars. Pro Stock, Pro Mod ect...

Every guy that runs in the NHRA Stock class has there car figured out to the umth degree. The rest of us are trying to learn as we go to get our combos figured out to be the quickest we can be.

My experience has shown me that I'm still very far away from knowing everything.

A couple of guys on here have impressed me though the years and I don't take there advice lightly.

White Dart (Shiloh)

Al Alguire

W5Dart66 (Brett)

Best of luck guys and keep us in the loop on how to improve.


Last edited by Biginchmopar; 11/19/18 03:54 PM.
Re: CalTracs setup - Chassis separation or limit it? [Re: fast68plymouth] #2580221
11/19/18 03:17 PM
11/19/18 03:17 PM
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
hemi-itis Offline
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Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
Originally Posted By fast68plymouth
I’d say...... about this much seems to work pretty good:


Could you post a side shot at rest so we can see the amount of rise please?


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: CalTracs setup - Chassis separation or limit it? [Re: DoubleD] #2580222
11/19/18 03:21 PM
11/19/18 03:21 PM
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
hemi-itis Offline
I Live Here
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Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
Originally Posted By DoubleD
Yep just a little will do ya!

Same for you,picture at rest up
I'm still chasing the carbs,car leaves straight 85% of the time so I have not tried different settings and preload.
Does more preload help if the it's going straight off the line?

Order1076-8x10.jpg

HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: CalTracs setup - Chassis separation or limit it? [Re: Biginchmopar] #2580317
11/19/18 08:13 PM
11/19/18 08:13 PM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Offline
master
dvw  Offline
master

Joined: Mar 2006
Posts: 9,791
MI, usa
Originally Posted By Biginchmopar
The goal is to get to 100% Anti-Squat. This means trying to keep the rear wheel neutral during the launch. If you have a light big power car you need to control the front end lift with wheelie bars. Pro Stock, Pro Mod ect...

Every guy that runs in the NHRA Stock class has there car figured out to the umth degree. The rest of us are trying to learn as we go to get our combos figured out to be the quickest we can be.

My experience has shown me that I'm still very far away from knowing everything.

A couple of guys on here have impressed me though the years and I don't take there advice lightly.

White Dart (Shiloh)

Al Alguire

W5Dart66 (Brett)

Best of luck guys and keep us in the loop on how to improve.


How do achieve 100% anti-squat if the instant center is above the anti-squat line? A Cal-Track instant center is pretty short, most likely putting above the anti-squat line. You can slow it down with stiff rebound, but the physics says it'll still separate. Am I missing something?
Doug

Re: CalTracs setup - Chassis separation or limit it? [Re: dvw] #2580375
11/19/18 10:54 PM
11/19/18 10:54 PM
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
Biginchmopar Offline
pro stock
Biginchmopar  Offline
pro stock

Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
Originally Posted By dvw
Originally Posted By Biginchmopar
The goal is to get to 100% Anti-Squat. This means trying to keep the rear wheel neutral during the launch. If you have a light big power car you need to control the front end lift with wheelie bars. Pro Stock, Pro Mod ect...

Every guy that runs in the NHRA Stock class has there car figured out to the umth degree. The rest of us are trying to learn as we go to get our combos figured out to be the quickest we can be.

My experience has shown me that I'm still very far away from knowing everything.

A couple of guys on here have impressed me though the years and I don't take there advice lightly.

White Dart (Shiloh)

Al Alguire

W5Dart66 (Brett)

Best of luck guys and keep us in the loop on how to improve.


How do achieve 100% anti-squat if the instant center is above the anti-squat line? A Cal-Track instant center is pretty short, most likely putting above the anti-squat line. You can slow it down with stiff rebound, but the physics says it'll still separate. Am I missing something?
Doug


I said the goal is 100% Anti-Squat
I didn't say it should be done with CalTracs
You not missing anything, you have to control the separation with whatever you can, shocks, weight, front end travel, ect...

Watch the World fastest leaf spring Mopar, it's a Dart that runs real hard and the I don't think it lifts the front tires off the ground.

I'm saying if you work on it you are looking for 100% Anti-Squat.

Re: CalTracs setup - Chassis separation or limit it? [Re: dvw] #2580382
11/19/18 11:16 PM
11/19/18 11:16 PM
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
W
WHITEDART Offline
master
WHITEDART  Offline
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W

Joined: Oct 2011
Posts: 3,036
bean town ....Ca
Man thanks for the kind words those are some big names that you Tangled me up with
. I have learned a lot from both Brett and AL Myself.
. As ET improves the
Suspension requirements change. I think the best thing is get the cars out there and get some video up so we can all take a look. And all learn from one another

Last edited by WHITEDART; 11/19/18 11:20 PM.

In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: CalTracs setup - Chassis separation or limit it? [Re: Biginchmopar] #2580405
11/19/18 11:52 PM
11/19/18 11:52 PM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Offline
master
dvw  Offline
master

Joined: Mar 2006
Posts: 9,791
MI, usa
Originally Posted By Biginchmopar
Originally Posted By dvw
Originally Posted By Biginchmopar
The goal is to get to 100% Anti-Squat. This means trying to keep the rear wheel neutral during the launch. If you have a light big power car you need to control the front end lift with wheelie bars. Pro Stock, Pro Mod ect...

Every guy that runs in the NHRA Stock class has there car figured out to the umth degree. The rest of us are trying to learn as we go to get our combos figured out to be the quickest we can be.

My experience has shown me that I'm still very far away from knowing everything.

A couple of guys on here have impressed me though the years and I don't take there advice lightly.

White Dart (Shiloh)

Al Alguire

W5Dart66 (Brett)

Best of luck guys and keep us in the loop on how to improve.


How do achieve 100% anti-squat if the instant center is above the anti-squat line? A Cal-Track instant center is pretty short, most likely putting above the anti-squat line. You can slow it down with stiff rebound, but the physics says it'll still separate. Am I missing something?
Doug


I said the goal is 100% Anti-Squat
I didn't say it should be done with CalTracs
You not missing anything, you have to control the separation with whatever you can, shocks, weight, front end travel, ect...

Watch the World fastest leaf spring Mopar, it's a Dart that runs real hard and the I don't think it lifts the front tires off the ground.

I'm saying if you work on it you are looking for 100% Anti-Squat.

Video's show Digby's Dart separating a good 4" or more at the rear. Mark Menscer made mention recently that instant center settings are getting shorter and higher to load the tire harder. As for the front being controlled with slow rise, I agree 100%. Depending on available tire hit the car may or may not need front travel. 2 opposite ends of the car. Most cars I've been involved with that don't work have rebound too loose on either front, rear, or both ends.
Doug

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