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Re: 76 duster traction with caltracks questions
[Re: dmking]
#1069141
09/04/11 06:26 PM
09/04/11 06:26 PM
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Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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I had identical problems with mine, I could get it too hook good but as the night went on it could be hit and miss. I solved it by going to a four link and 14.5/32's. A lot of guys think and will tell you that CalTracs are just the best and their 8 second cars always hook. Well either they are being less than truthful or they run on some very nice well prepped tracks all the time or they use progressive nitrous or boost controllers and/or traction control equipment. Don't get me wrong, CalTracs are probably the best thing out there for a leaf spring car but if you don't have to keep a leaf spring a four link is much better. I'm sure others will disagree with me but that's my  Flame on.   
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 76 duster traction with caltracks questions
[Re: dmking]
#1069145
09/04/11 07:37 PM
09/04/11 07:37 PM
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Joined: Jul 2004
Posts: 19,318
State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
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Have you tried the bottom hole yet? My car did funny things in the upper hole.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: 76 duster traction with caltracks questions
[Re: Thumperdart]
#1069146
09/04/11 07:55 PM
09/04/11 07:55 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
master
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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Those Drag radials or something? If they are regular byes ply slick, its way too much pressure. Id start about 10 PSI and re-try it.
I have had Caltraks on about everything. They worked and worked well on a 87 Dakota Short Bed with a Big block. If they work on this they can work on most anything, due to the horrible weight ratio from front to back.
The front shocks should be as loose as you an get the extension and on the hard side on the compression. This will let the car pitch roll and help hold the front end up, and letting it settle back down slower. This is what makes racing fun for me. Once you figure it out, you will be happy. Its better than blowing a bunch of money with ladder bars, and 4 links while not addressing the issue, or taking the time to figure it out. IMO
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: 76 duster traction with caltracks questions
[Re: redruM]
#1069150
09/05/11 09:50 AM
09/05/11 09:50 AM
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Joined: Feb 2009
Posts: 401
dayton,ohio
ROSSIO
mopar
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mopar
Joined: Feb 2009
Posts: 401
dayton,ohio
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my 70 dart-runs 8.90s@151-----top hole-ranchos set on 6--11 lbs in slicks-frtQA1 set on soft-lift/10 clicks rebound--4 1/2 in of travel i have never set my bars with preload-i always set them just touching the spring and have good results---------------here in ohio-are tracks are ALWAY marginal-so i've had to set my car up with these track conditions----ive had the caltracs setup for 3 years and love it to me----my opinion only-----3 link and 14x32s----thats easy,i liked challenge of making my set up work--it was hard at first--it took a month--but i got it,now i go up -look at the starting line --then adjust the shocks,for what it see----and go play
1970 DART B1MC N/A
8.86@ [Email]155
3200 lb on 275 DR
5.30 @ 130 1/8
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Re: 76 duster traction with caltracks questions
[Re: dmking]
#1069151
09/05/11 10:08 AM
09/05/11 10:08 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Its going to make a difference what you do based on what is happening... if its a bounce then spin or spinning from the get go.... look at the front end to get it loose and lots of travel... a video does wonders 
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Re: 76 duster traction with caltracks questions
[Re: MR_P_BODY]
#1069152
09/05/11 10:48 AM
09/05/11 10:48 AM
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Joined: Apr 2011
Posts: 319
jonestown,pa
dmking
OP
enthusiast
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OP
enthusiast
Joined: Apr 2011
Posts: 319
jonestown,pa
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if it spins it usually shakes but pulls loosing about .1 in the 60ft but pulls out. here of late sometimes it just blows the tires off the line.
saturday i think i am going to cecil md and i hope i have someone to video.
Last edited by dmking; 09/05/11 11:06 AM.
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Re: 76 duster traction with caltracks questions
[Re: dmking]
#1069154
09/05/11 11:55 AM
09/05/11 11:55 AM
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Joined: Nov 2003
Posts: 7,348
Mt.Vernon ,Ohio
VernMotor
master
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master
Joined: Nov 2003
Posts: 7,348
Mt.Vernon ,Ohio
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Quote:
i have a 76 duster 440 indy heads (old torquers i think) lupo dynamic converter 5400 to 5600rpm flash. 29x30x10 d5 hoosiers at 12psi to 13.5psi
i am getting sick of it having margional traction unless a well prepped track when others are hooking well.
i have caltracks with the by leaf springs rancho adjustible shocks set on the soft side (3 i think) and QA1 fronts at 3.
the links are in the upper hole at 1/4 turn of preload.
the 60ft at maplegrove and cecil is usually 1.46 to 1.47 when it bites.
i am looking to get it to work better on the margional tracks like everyone else can do.
does preload on the links effect how hard it hits the tires?
wow I would change alot in this combo..I read what everyone else is saying also..But I don't agree with all of it. you got good HP and and a very high stall converter with the cal-trac set up on a hard hit. first thing I do is put the bars in the bottom hole and take the pre load out.. top hole preload = hard hit. I think you are close on air pressure. I am abit confused about what tire size you are running ? 29x30x10 ? they are 29x10 or 30x10 ? what springs ? mono ? rancho shocks 9 for good tracks and 7 for bad tracks less than that they are not doing anything..Front end is got to be loose and have travel..THIS is a must! most of the cars I have work on the problem is in the front.What gear is in this thing ? and do you have a low gear set in the trans ? I think you got too much converter in to start with..is this a trans brake ? what rpm do you leave at ?
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Re: 76 duster traction with caltracks questions
[Re: dmking]
#1069156
09/05/11 04:26 PM
09/05/11 04:26 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
my bad on tire size. it is 30x10 d5 slicks.
the springs are the calvert bi leaf.
gears are 4.30 stock 727 with transgo kit in valvebody
i always make sure i am in low for atleast 1 foot when rolling into the first light.
non transbrake i am foot brakeing this car
i usually leave around 1700 to 2200rpms.
mopar weekent at maplegrove it worked great. first pass 1.46 60ft and a 10.250 i dialed a 10.250 and it went 10.252 and the third run was a 10.258. it runs the number when it hooks.
so you think i am hitting the tires too hard?
i can have it not bite at all with the shocks on 8 in the rear.
when i got the rear ranchos it said to be at 5 and go lower for a poor track and above 5 for a great track.
I would lower it and start about 6 on a bad track,
get as much front end travel as possible... if needed
cut the upper bump stop way down
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