CAL TRAC PRELOAD QUESTION
#1056438
08/18/11 11:52 PM
08/18/11 11:52 PM
|
Joined: Dec 2003
Posts: 1,400 Wi.
old_racer
OP
pro stock
|
OP
pro stock
Joined: Dec 2003
Posts: 1,400
Wi.
|
Hi, was racing at the Nats and a guy came up to me and asked how I had my cal tracs set, I have the whole set up, they're mono spring etc. rancho shocks, I'm a 11:00 nostalgia SS car, my car's best is around 1.46 .60ft, most of the time around 1.49 to 1.51, during class run off with similar cars et, I look at others .60ft and mines good if not better than theres. any way the guy said he talked to another racer who's running good and has 2 turns of preload on his bars, and I'm running with about 2 flats on the bars, two full turns seems like a lot. it seams like it would bend the springs quite a bit to get 2 full turns on the bars. just wondering what others use and what works for them. maybe I'm missing something. thanks Russ
|
|
|
Re: CAL TRAC PRELOAD QUESTION
[Re: superwrench]
#1056440
08/19/11 02:38 AM
08/19/11 02:38 AM
|
Joined: Mar 2009
Posts: 2,460 Sydney,Australia
tex013
top fuel
|
top fuel
Joined: Mar 2009
Posts: 2,460
Sydney,Australia
|
i have a 1/4 turn each side,as per a call to Caltracs. pulls straight,never had cause to try anything else i have found the ranchos work best for me on #9,1.54-1.57 60 Tex
New best ET 10.259@129.65 . New best MPH 130.32 Finally fitted a solid cam, stepped it up a bit more 3690lbs through the mufflers New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm Power by Tex's Automotive
|
|
|
Re: CAL TRAC PRELOAD QUESTION
[Re: tex013]
#1056441
08/19/11 08:46 AM
08/19/11 08:46 AM
|
Joined: Dec 2005
Posts: 1,495 Shelby mi.
JAKE68
pro stock
|
pro stock
Joined: Dec 2005
Posts: 1,495
Shelby mi.
|
Once you have your side to side set up and done trying different pre loads is part of the tuning you do for your car. what it likes. There is some nhra stockers that put up to 2 full turns of preload after it was set up.
JAKES AUTOMOTIVE
|
|
|
Re: CAL TRAC PRELOAD QUESTION
[Re: old_racer]
#1056442
08/19/11 11:17 AM
08/19/11 11:17 AM
|
Joined: Jan 2003
Posts: 13,357 Marion, South Carolina [><]
an8sec70cuda
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
|
I only run a 1/4 turn on both sides. Bottom hole, shocks on 9.
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: CAL TRAC PRELOAD QUESTION
[Re: JAKE68]
#1056445
08/19/11 12:11 PM
08/19/11 12:11 PM
|
Joined: Jan 2003
Posts: 4,852 KENTUCKY
69CHARGERMD
master
|
master
Joined: Jan 2003
Posts: 4,852
KENTUCKY
|
Quote:
put up to 2 full turns of preload
This will soften up the hit I assume,,,
Sounds like it varies alot with the individual car,,,
I have heard leave a "nickel" size air gap,,,all the way up to lots of preload...as far as ways to adjust them.
Jake, ( and Jim ) ,,what are you running for rear tire pressure ?
thanks,
Doug
|
|
|
Re: CAL TRAC PRELOAD QUESTION
[Re: 69CHARGERMD]
#1056446
08/19/11 02:25 PM
08/19/11 02:25 PM
|
Joined: Dec 2005
Posts: 1,495 Shelby mi.
JAKE68
pro stock
|
pro stock
Joined: Dec 2005
Posts: 1,495
Shelby mi.
|
We run about 14.5lbs. WE have right now with driver 1/2 turn preload with 35lbs more on right side. 3550#w dr. 1.29 60's 10.5w
Last edited by JAKE68; 08/19/11 04:44 PM.
JAKES AUTOMOTIVE
|
|
|
Re: CAL TRAC PRELOAD QUESTION
[Re: 69CHARGERMD]
#1056449
08/20/11 08:34 PM
08/20/11 08:34 PM
|
Joined: Sep 2006
Posts: 1,442 central ohio
nss guy
pro stock
|
pro stock
Joined: Sep 2006
Posts: 1,442
central ohio
|
Quote:
Quote:
put up to 2 full turns of preload
Jake, ( and Jim ) ,,what are you running for rear tire pressure ?
thanks,
Doug
Doug, I run between 12.5 and 13.5 psi, M/T 29.5 x 10.5 bias 20-24 psi when running hoosier 30x9 radials and yes the radials are about tenth quicker!
Jim
|
|
|
Re: CAL TRAC PRELOAD QUESTION
[Re: nss guy]
#1056450
08/20/11 08:45 PM
08/20/11 08:45 PM
|
Joined: Jan 2003
Posts: 4,852 KENTUCKY
69CHARGERMD
master
|
master
Joined: Jan 2003
Posts: 4,852
KENTUCKY
|
Quote:
I run between 12.5 and 13.5 psi
Thanks Jim,,,, I was running 14 lbs,,,but the car was "on ice" off the line,,,dropped it to 12 lb,,,and it took care of it,,,thanks,,,,see ya at Norwalk.
ps,,nice sig pic.
|
|
|
|
|