CalTracs and Rancho adjustable shocks

biged681985

biged681985

Arklahoma Bombers
I just got my CalTracs and Rancho adjustable shocks on my 4wd RCLB truck. I done a search and found where a member had said he set his caltracs up by hand tightening them and backing them off three turns, so that's where i'm starting at on them.

On the shocks, I have them set at 5. What setting should they be set at front and rear? Softer in the front and stiffer in the rear?

done two 20psi boosted launches to see how it did, it didn't bounce when it spun like it used to, but it did spin non the less.

Suspension setup
Front - Rancho adjustable shock, shock tower delete, and 1 full coils cut on the front.
Rear - Rancho adjustable shock, Caltracs, and all springs removed besides the main spring and the small bottom spring.

Any suggestions?
 
RS9000's: I can't really say from experience with those specific shocks, but I would stiffen them up a tad beyond where they are most comfortable on the street, then see if you are faster or slow as you adjust them.

Caltrac Bars: Try them unloaded, then pre-load them, and see if you go faster in the 60'. If you aren't racing don't worry about it. They will control the axle well enough on the street either way. Though you will probably have a better ride with no pre-load.
 
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Watching. I just did strange double adjustable coil overs with a single leaf on my superstreet truck. Haven't got to tune them yet but so far they seem to work great
 
Its my understanding that you still want weight transfer to the rear. So softer in the rear with less rebound, and stiffer in the front. IIRC
 
I don't have much racing experience to back it up, so take this for what it's worth....

If rs9000's adjust compression and rebound together....

If you let the truck unload the front tires your 60' time will suffer. Since you don't have control of compression and rebound valving separately, you will need to add anti squat with the caltrac bars then crank up the stiffness on the 9000's to keep the suspension in control. On the front, you don't want the truck to lift at all because that will be taking load off the front tires. So crank up those shocks too.
 
bgreen776 said:
I don't have much racing experience to back it up, so take this for what it's worth....

If rs9000's adjust compression and rebound together....

If you let the truck unload the front tires your 60' time will suffer. Since you don't have control of compression and rebound valving separately, you will need to add anti squat with the caltrac bars then crank up the stiffness on the 9000's to keep the suspension in control. On the front, you don't want the truck to lift at all because that will be taking load off the front tires. So crank up those shocks too.
Click to expand...

So I was way off lol. Why would you want to keep all the weight to the front?
 
Please read Dockboy's posts in this thread concerning your Caltracs:

http://www.competitiondiesel.com/forums/showthread.php?p=1473645#post1473645

As for the shocks: IMO, a single adjustable on the front (my case--QA1s) adjusted to highest compression/rebound setting works well. You dont want the front to jump up or flop down quickly. Rear should be soft so you get some squat. I just used my Bilsteins.

That setup netted me 1.6x/low 1.7 -60s on a consistant basis with a best of 1.60 on street tires.
 
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madmikeismad said:
So I was way off lol. Why would you want to keep all the weight to the front?
Click to expand...

Before I set mine up like that I would constantly smoke the front right tire, usually running 1.7x to 1.68 60' times. The truck was all over the place. Now it just plants and goes, smooth as silk and straight as an arrow and runs an easy 1.61 60'. I suspect it will get much lower when I get a good converter in it.
 
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bgreen776 said:
Before I set mine up like that I would constantly smoke the front right tire, usually running 1.7x to 1.68 60' times. The truck was all over the place. Now it just plants and goes, smooth as silk and straight as an arrow and runs an easy 1.61 60'. I suspect it will get much lower when I get a good converter in it.
Click to expand...

If you're only spinning one tire, would that mean it's little different size than the others? Or slightly different gear ratio in the front? like 4.10's to 4.11's?
 
biged681985 said:
I just got my CalTracs and Rancho adjustable shocks on my 4wd RCLB truck. I done a search and found where a member had said he set his caltracs up by hand tightening them and backing them off three turns, so that's where i'm starting at on them.



On the shocks, I have them set at 5. What setting should they be set at front and rear? Softer in the front and stiffer in the rear?



done two 20psi boosted launches to see how it did, it didn't bounce when it spun like it used to, but it did spin non the less.



Suspension setup

Front - Rancho adjustable shock, shock tower delete, and 1 full coils cut on the front.

Rear - Rancho adjustable shock, Caltracs, and all springs removed besides the main spring and the small bottom spring.



Any suggestions?
Click to expand...



Do you know the part number you used for the front shocks? Or rear for that matter
 
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