Cal-Tracs Equipped Car "bucking" on launch

Chad E532 · 06-01-2009, 01:30 PM

I am having some problems dialing in my car now that I have installed the Cal Tracs mono leaf springs and bar setup. The car launches and then as soon as the front end is up on the stops the car seems to rock or buck front to rear 2-3 times before straightening out. We have tried the upper and lower holes and also played with shock settings. I went to a longer travel rear shock thinking I was running out of travel but that does not seem to be the case. I have been able to minimize the action but it does not go away completely. Right now I am running 3 clicks on the rear QA1 shocks (single adjust) with the Cal Tracs in the bottom hole with 1/4 turn of preload each side with driver in car.
The front end has the AFCO bushings, Moroso trick springs, and Cal Tracs 90/10s giving me 4.5" of front end travel. I am running 30x9 Goodyear radials and tried 20 psi and 18 psi with 18 giving me a slightly better 60' but still rocking.
My father also recently put the mono leafs and Cal Tracs on his car and is seeing similar bucking but not to the level that I am.
Thanks in advance for any help you can provide.
Chad

Bob Bender · 06-01-2009, 04:03 PM

Put the bar in the top hole

Greg Hill · 06-01-2009, 04:04 PM

I would try tightening up the back shocks.

340Cuda · 06-01-2009, 07:20 PM

I would call Calvert and talk to Travis or John. Best customer service in racing.

I thought my car had too much rise. I emailed a photo and they agree and sent me another pair of springs, no charge. I assumed they wanted the first ones returned and I sent them back, however they never asked for them.

Bill Lamb

Jim Bailey · 06-01-2009, 08:14 PM

Chad, you'll have to figure out what works for your car. The longer wheelbase cars, like mine, Shaul's Plymouth, etc. seem to like the bottom hole. Most of the really good running shorter wheelbase cars seem to be running the upper hole. My car bucked until I had the rear shocks hard enough, and enough pre load. I set my shocks as stiff as possible, and use one full turn of preload, set with me sitting in the car. Hope this helps. JB

carbuilder · 06-01-2009, 11:25 PM

Cal Tracs? you kidding,,put on a old set of Lakewood bars an forget about it,,,Cal Tracs are a pretzel making device for leaf springs

Sean Haning · 06-02-2009, 08:02 AM

Quote:

Originally Posted by carbuilder

Cal Tracs? you kidding,,Cal Tracs are a pretzel making device for leaf springs

Nice second post and not even any factual information to support the statement.

bobby · 06-04-2009, 05:30 AM

I had actually built a set of bars like the caltracs. I ran the bottom bar level with the ground. after running these for 10 years, the right rear stock leaf spring decided it didnt want to go down the track anymore, so I put some ladder bars and coil overs on it.

OLDGOAT · 06-04-2009, 12:27 PM

Quote:

Originally Posted by Chad E532

I am having some problems dialing in my car now that I have installed the Cal Tracs mono leaf springs and bar setup. The car launches and then as soon as the front end is up on the stops the car seems to rock or buck front to rear 2-3 times before straightening out. We have tried the upper and lower holes and also played with shock settings. I went to a longer travel rear shock thinking I was running out of travel but that does not seem to be the case. I have been able to minimize the action but it does not go away completely. Right now I am running 3 clicks on the rear QA1 shocks (single adjust) with the Cal Tracs in the bottom hole with 1/4 turn of preload each side with driver in car.
The front end has the AFCO bushings, Moroso trick springs, and Cal Tracs 90/10s giving me 4.5" of front end travel. I am running 30x9 Goodyear radials and tried 20 psi and 18 psi with 18 giving me a slightly better 60' but still rocking.
My father also recently put the mono leafs and Cal Tracs on his car and is seeing similar bucking but not to the level that I am.
Thanks in advance for any help you can provide.
Chad

Can you get 5-6" ? That is what was suggested for my car.

OLDGOAT

06-01-2009, 01:30 PM	#1
Chad E532 Member Join Date: Jul 2008 Location: Lindstrom MN Posts: 156 Likes: 7 Liked 54 Times in 7 Posts	Cal-Tracs Equipped Car "bucking" on launch I am having some problems dialing in my car now that I have installed the Cal Tracs mono leaf springs and bar setup. The car launches and then as soon as the front end is up on the stops the car seems to rock or buck front to rear 2-3 times before straightening out. We have tried the upper and lower holes and also played with shock settings. I went to a longer travel rear shock thinking I was running out of travel but that does not seem to be the case. I have been able to minimize the action but it does not go away completely. Right now I am running 3 clicks on the rear QA1 shocks (single adjust) with the Cal Tracs in the bottom hole with 1/4 turn of preload each side with driver in car. The front end has the AFCO bushings, Moroso trick springs, and Cal Tracs 90/10s giving me 4.5" of front end travel. I am running 30x9 Goodyear radials and tried 20 psi and 18 psi with 18 giving me a slightly better 60' but still rocking. My father also recently put the mono leafs and Cal Tracs on his car and is seeing similar bucking but not to the level that I am. Thanks in advance for any help you can provide. Chad

06-01-2009, 04:03 PM	#2
Bob Bender VIP Member Join Date: Jan 2009 Location: Maryland Posts: 1,733 Likes: 1,599 Liked 459 Times in 90 Posts	Re: Cal-Tracs Equipped Car "bucking" on launch Put the bar in the top hole __________________ Bob Bender 144 O/SA 2010-2012 National Record Holder

06-01-2009, 04:04 PM	#3
Greg Hill VIP Member Join Date: May 2006 Location: Louisville , KY Posts: 1,995 Likes: 68 Liked 279 Times in 68 Posts	Re: Cal-Tracs Equipped Car "bucking" on launch I would try tightening up the back shocks. __________________ Greg Hill 4171 STK

06-01-2009, 07:20 PM	#4
340Cuda VIP Member Join Date: Apr 2003 Location: Tulsa, Oklahoma Posts: 1,671 Likes: 3,856 Liked 801 Times in 338 Posts	Re: Cal-Tracs Equipped Car "bucking" on launch I would call Calvert and talk to Travis or John. Best customer service in racing. I thought my car had too much rise. I emailed a photo and they agree and sent me another pair of springs, no charge. I assumed they wanted the first ones returned and I sent them back, however they never asked for them. Bill Lamb

06-01-2009, 08:14 PM	#5
Jim Bailey Senior Member Join Date: Aug 2004 Posts: 674 Likes: 15 Liked 584 Times in 94 Posts	Re: Cal-Tracs Equipped Car "bucking" on launch Chad, you'll have to figure out what works for your car. The longer wheelbase cars, like mine, Shaul's Plymouth, etc. seem to like the bottom hole. Most of the really good running shorter wheelbase cars seem to be running the upper hole. My car bucked until I had the rear shocks hard enough, and enough pre load. I set my shocks as stiff as possible, and use one full turn of preload, set with me sitting in the car. Hope this helps. JB

06-01-2009, 11:25 PM	#6
carbuilder Junior Member Join Date: Jul 2002 Location: detroit area Posts: 27 Likes: 9 Liked 19 Times in 5 Posts	Re: Cal-Tracs Equipped Car "bucking" on launch Cal Tracs? you kidding,,put on a old set of Lakewood bars an forget about it,,,Cal Tracs are a pretzel making device for leaf springs

06-04-2009, 05:30 AM	#8
bobby Member Join Date: Jun 2008 Location: League City, Texas Posts: 243 Likes: 0 Liked 0 Times in 0 Posts	Re: Cal-Tracs Equipped Car "bucking" on launch I had actually built a set of bars like the caltracs. I ran the bottom bar level with the ground. after running these for 10 years, the right rear stock leaf spring decided it didnt want to go down the track anymore, so I put some ladder bars and coil overs on it. __________________ Next time wave all of your fingers at me.