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Old 07-03-2013, 08:19 AM   #31
Todd Hoven
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Default Re: Setting up Cal Tracs

Has anybody running a stickshift experimented with running preload in both bars? Have you seen any benefits? When I scaled my car, the corner weights started balancing out when I did this.
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Old 07-03-2013, 02:01 PM   #32
Dirk Olson
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Default Re: Setting up Cal Tracs

Guys,

I have been reading all of your entries, all excellent advice. This car has a transbrake, knowing that, how it reacts will be much like a stick car. There are a ton of factors to consider. We all know that every car is differant and one must find that sweet spot. Launch RPM will be critical. Weight placment in the car also plays an important part. Converter also plays an important role, How loose is it and how much run at it, will change how the bcar leaves. I agree with Troy for this application double adjustables are desired. Afcos are spendy and there are others out there. Buy the best you can afford. I can tell this, I question the Landrum springs I had a set when I first started racing my B/S car. First pass bent them, sent them back they gave me a new and improved, first pass bent them again. I then cut the front half off and used them to support the front half of the stock spring worked great. I have replaced them with Caltracks.

Dirk
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Old 07-05-2013, 08:13 PM   #33
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Default Re: Setting up Cal Tracs

I run a 275 M/T Pro radial tire on my 67 Camaro. Basic combination, 468 BBC, 3-speed, 5700-6000 RPM flash depending on tune and DA, 4.10's, 3300+ lbs

Below are some basic suspension and tuning settings I've used based on conditions.

Marginal track surface, early summer air pulling power and adding ballast. 1.35 60 foot

Rear AFCO DA's set full stiff/full stiff
200 lb split monos out back
Caltracs set with slight gap with driver weight and no ballast, top hole
120 lbs ballast in trunk
Tires set at 17 lbs hot
Front AFCO BNC DA's set full loose ext, full stiff comp
180 lb Santhuff's up front + 1" of spacers
5.5" travel
Leaving off the transbrake and two-step set at 2500
-15 degrees Launch Retard in the Power Grid for 1.5 seconds

On a killer track, fall DA, no ballast, car setup to run and leave as hard as possible. 1.27 60 foot

Rear AFCO DA's set 1/2 to 3/4 turn off of full stiff ext. /full stiff comp.,
200 lb split monos out back
Caltracs set with slight gap with driver weight and no ballast, top hole
No ballast in trunk
Tires set at 18-20 lbs hot
Front AFCO BNC DA's set anywhere from 5-10 clicks off full stiff ext, full stiff comp
180 lb Santhuff's up front + 1" of spacers
4.5" travel (1" taken out with limiters)
Leaving off the footbrake at 1800 RPM.
+4 degrees added at launch in the Power Grid to 6500 RPM in low gear
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Last edited by 40Coupe; 07-05-2013 at 08:21 PM.
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Old 10-30-2013, 09:53 AM   #34
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Default Re: Setting up Cal Tracs

this is for troy give me a call on your wheelie bars thanks B Dixon 605-999-9220 thks
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Old 06-26-2019, 09:10 AM   #35
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Default Re: Setting up Cal Tracs

Quote:
Originally Posted by Troy Henderson View Post
Good advice Jeff. The reason I like the compression fairly stiff if for a leaf spring car. They separate a lot when they leave which creates a bunch of stored energy that can pull the wheel back up too quick. This applies the most to a stick car. Loosen it some for a trans brake car, and even more for a footbrake car.

Is this for slicks or radials? On my car I run full stiff on comp, and anywhere from 5-10 off full tight on ext on my DA Afco's in back. 18-19 lbs of air , this is on a et ss 275/60 STREET RADIAL, Now trying the radial pro's. Foot brake by the way using a 2 step. I've been 1.29 with the 4.10's and 1.32 with the 3.73's on the ET tires in my 3580 lb 74 Pump Gas firebird.

Last edited by 74fb461; 06-26-2019 at 09:13 AM.
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Old 06-26-2019, 09:48 AM   #36
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Default Re: Setting up Cal Tracs

Quote:
Originally Posted by 74fb461 View Post
Is this for slicks or radials? On my car I run full stiff on comp, and anywhere from 5-10 off full tight on ext on my DA Afco's in back. 18-19 lbs of air , this is on a et ss 275/60 STREET RADIAL, Now trying the radial pro's. Foot brake by the way using a 2 step. I've been 1.29 with the 4.10's and 1.32 with the 3.73's on the ET tires in my 3580 lb 74 Pump Gas firebird.
This is for slicks on my application. I'm not a radial guy but they probably need to be much softer to keep the tire planted.
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Old 06-26-2019, 10:37 AM   #37
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Default Re: Setting up Cal Tracs

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Originally Posted by Troy Henderson View Post
This is for slicks on my application. I'm not a radial guy but they probably need to be much softer to keep the tire planted.
I was just curious as i Seen that post, on my slicks i do back off the comp some to allow it to get up on the tire better
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