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Question Scales 4 corners #1297094 09/04/12 11:40 AM 09/04/12 11:40 AM
Joined: Apr 2005 Posts: 1,505 TN S SCATPACK 1 OP pro stock
SCATPACK 1 OP pro stock S Joined: Apr 2005 Posts: 1,505 TN	If you scale a 3200 lb B body with a big block and auto and 4 link in it. I know this is open to a lot of conjecture. But I need a starting point to shoot for. Assuming the weight bias is 55-45 front to rear. With the fat driver in the car, what would you shoot for at each corner. Old Geezer Racing

Re: Question Scales 4 corners [Re: SCATPACK 1] #1297095 09/04/12 03:07 PM 09/04/12 03:07 PM
Joined: Aug 2003 Posts: 43,223 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,223 Bend,OR USA	30 to 50 lbs more on the right rear compared to the left rear I install both batterys and offset the fuel cell to the right side to get there Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Question Scales 4 corners [Re: SCATPACK 1] #1297096 09/04/12 03:29 PM 09/04/12 03:29 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	I would start at 20-25 pounds extra on the RR tire and if it still goes right on the launch at more

Re: Question Scales 4 corners [Re: MR_P_BODY] #1297097 09/04/12 03:45 PM 09/04/12 03:45 PM
Joined: Jan 2012 Posts: 2,652 Stuttgart, Arkansas rickseeman master
rickseeman master Joined: Jan 2012 Posts: 2,652 Stuttgart, Arkansas	There will be people telling you to screw on this and preload that to get the weights on each tire equal but I have never understood that. I would say put it together neutral and tune from there. 2011 Drag Pak Challenger

Re: Question Scales 4 corners [Re: rickseeman] #1297098 09/05/12 12:43 PM 09/05/12 12:43 PM
Joined: Apr 2005 Posts: 1,505 TN S SCATPACK 1 OP pro stock
SCATPACK 1 OP pro stock S Joined: Apr 2005 Posts: 1,505 TN	Quote: There will be people telling you to screw on this and preload that to get the weights on each tire equal but I have never understood that. I would say put it together neutral and tune from there. OK Another question, New to 4 links and want to be sure its right or close. Do you set the weight with the springs or do you preload the 4 link to get the weight you want on each wheel. For example, if the back right is less than the back eft, would you tighten up the left front spring or the right rear spring or both? IF you tighten up the right rear spring, does that shift more of the weight to the front wheels or does it just affect the right rear wheel. Or do you set all 4 of the springs the same and adjust the weight by putting pre-load into the 4 link bars? thanks again for your help. Old Geezer Racing

Re: Question Scales 4 corners [Re: SCATPACK 1] #1297099 09/05/12 12:51 PM 09/05/12 12:51 PM
Joined: Aug 2003 Posts: 43,223 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,223 Bend,OR USA	I think the hieght and length of the intersecting point( IE 7 inches up and 54 inches out) is far more important to start with than the weight bias. I don't have much experience with a four link but I listen to guys that have them and have ask them what they do and what they set them at. It is the combination of each car, weight, weight bias, HP and tire size that makes the end results work. I would put the car on the scales with your body weight in the seat and the car set up like it will be run, IE batterys, gas in the fuel cell and so on and find out what amount of preload on the left front spring takes to load the right rear the way you want it Same thing on the rear adjustments, most of the guys I've listen to don't do more than one flat on the right bar(not sure if it is the upper or lower bar, sorry) to set preload Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Question Scales 4 corners [Re: SCATPACK 1] #1297100 09/05/12 12:52 PM 09/05/12 12:52 PM
Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio dartman366 I Live Here
dartman366 I Live Here Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio	Quote: Quote: There will be people telling you to screw on this and preload that to get the weights on each tire equal but I have never understood that. I would say put it together neutral and tune from there. OK Another question, New to 4 links and want to be sure its right or close. Do you set the weight with the springs or do you preload the 4 link to get the weight you want on each wheel. For example, if the back right is less than the back eft, would you tighten up the left front spring or the right rear spring or both? IF you tighten up the right rear spring, does that shift more of the weight to the front wheels or does it just affect the right rear wheel. Or do you set all 4 of the springs the same and adjust the weight by putting pre-load into the 4 link bars? thanks again for your help. I cannot answer anything as to 4 links but remember to have the car at race weight as if it's sitting on the starting line with you or someone or thing of your equal weight in the driver seat, I run a ladder bar car so I am watching this so to learn more about 4 links. Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.

Re: Question Scales 4 corners [Re: dartman366] #1297101 09/05/12 06:32 PM 09/05/12 06:32 PM
Joined: Apr 2005 Posts: 1,505 TN S SCATPACK 1 OP pro stock
SCATPACK 1 OP pro stock S Joined: Apr 2005 Posts: 1,505 TN	Any other thoughts on setting the springs to even out the balance or using the bars tire load with??? thanks Old Geezer Racing

Re: Question Scales 4 corners [Re: SCATPACK 1] #1297102 09/05/12 08:37 PM 09/05/12 08:37 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Quote: There will be people telling you to screw on this and preload that to get the weights on each tire equal but I have never understood that. I would say put it together neutral and tune from there. OK Another question, New to 4 links and want to be sure its right or close. Do you set the weight with the springs or do you preload the 4 link to get the weight you want on each wheel. For example, if the back right is less than the back eft, would you tighten up the left front spring or the right rear spring or both? IF you tighten up the right rear spring, does that shift more of the weight to the front wheels or does it just affect the right rear wheel. Or do you set all 4 of the springs the same and adjust the weight by putting pre-load into the 4 link bars? thanks again for your help. You leave the pre-loag ZERO till you get the weight set... if you mess with the left front it will move weight to the opposite corner(LF to RR).. once you get the car in shape and at ride height then you put in a small bit of pre load... different weight cars and the way they're built will require different pre loads.. mine uses 15# pre load

Re: Question Scales 4 corners [Re: MR_P_BODY] #1297103 09/06/12 12:02 AM 09/06/12 12:02 AM
Joined: May 2003 Posts: 2,117 Cleveland Ohio 10secGTX top fuel
10secGTX top fuel Joined: May 2003 Posts: 2,117 Cleveland Ohio	This is crazy .... i just finished doing this to my GTX I was hoping you could see the picture, it reads wgt 3832 w/ me 190lbs frt 50.5% rear 49.5% lft frt 1000 rgt frt 934 lft rear 974 rgt rear 924 my friend said dont touch a thing 7366815-scaled9-5-12.jpg (54 downloads) Last edited by 10secGTX; 09/06/12 12:08 AM.

Re: Question Scales 4 corners [Re: 10secGTX] #1297104 09/06/12 12:21 AM 09/06/12 12:21 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: This is crazy .... i just finished doing this to my GTX I was hoping you could see the picture, it reads wgt 3832 w/ me 190lbs frt 50.5% rear 49.5% lft frt 1000 rgt frt 934 lft rear 974 rgt rear 924 my friend said dont touch a thing Have you run it on the track yet EDIT The numbers dont have to be equal(nice if they are) but he may have added in weight already on the RR Last edited by MR_P_BODY; 09/06/12 12:23 AM.

Re: Question Scales 4 corners [Re: MR_P_BODY] #1297105 09/06/12 12:26 AM 09/06/12 12:26 AM
Joined: Nov 2008 Posts: 88 Regina Sask, Canada V Viper469 member
Viper469 member V Joined: Nov 2008 Posts: 88 Regina Sask, Canada	Right or wrong here's what we did. After making some initial passes(the car went hard right). We added some preload about 2 flats. Car still went right(not as bad). We scaled the car, approx #40 heavier on the LR. We then added #30 the the RR corner. Tried to lose as much #'s as we could find off the lt side, probbally #10-20. ended up at 1/2 turn of preload. Car went straight. Then we added nitrous. And right it went. Adjusted the RR spring perch up 1 1/2 turns, also adjusted the RF spring perch down 1 turn(mostly did this to get the car to sit somewhat level again). Then we just kept adjusting preload till it went straight. Ended up at 1 full turn. Food for thought. Adding weight buy adjusting LF spring isn't going to have much effect on the RR if the front wheels are in the air. Here' a pic after we got it sorted out. Pulls the wheels nice and even and goes nice and straight down the track. MY advise try and get more weight on the RR then the LT. Then adjust preload till it goes straight.

Re: Question Scales 4 corners [Re: MR_P_BODY] #1297106 09/06/12 01:08 AM 09/06/12 01:08 AM
Joined: May 2003 Posts: 2,117 Cleveland Ohio 10secGTX top fuel
10secGTX top fuel Joined: May 2003 Posts: 2,117 Cleveland Ohio	Quote: Quote: This is crazy .... i just finished doing this to my GTX I was hoping you could see the picture, it reads wgt 3832 w/ me 190lbs frt 50.5% rear 49.5% lft frt 1000 rgt frt 934 lft rear 974 rgt rear 924 my friend said dont touch a thing Have you run it on the track yet EDIT The numbers dont have to be equal(nice if they are) but he may have added in weight already on the RR This is how I've had for a year...it went 1.47 60' I'm lucky it hasn't gone left or right in any violent manner ....of course my wheelies are 2-4 inches off the ground.if that

Re: Question Scales 4 corners [Re: 10secGTX] #1297107 09/06/12 01:14 AM 09/06/12 01:14 AM
Joined: Jun 2004 Posts: 2,360 Mobile Alabama S SB412DUSTER top fuel
SB412DUSTER top fuel S Joined: Jun 2004 Posts: 2,360 Mobile Alabama	Quote: This is crazy .... i just finished doing this to my GTX I was hoping you could see the picture, it reads wgt 3832 w/ me 190lbs frt 50.5% rear 49.5% lft frt 1000 rgt frt 934 lft rear 974 rgt rear 924 my friend said dont touch a thing Are you sure you dont have the rear numbers mixed up??

Re: Question Scales 4 corners [Re: SB412DUSTER] #1297108 09/06/12 01:19 AM 09/06/12 01:19 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Quote: This is crazy .... i just finished doing this to my GTX I was hoping you could see the picture, it reads wgt 3832 w/ me 190lbs frt 50.5% rear 49.5% lft frt 1000 rgt frt 934 lft rear 974 rgt rear 924 my friend said dont touch a thing Are you sure you dont have the rear numbers mixed up?? That would be my guess

Re: Question Scales 4 corners [Re: MR_P_BODY] #1297109 09/06/12 01:28 AM 09/06/12 01:28 AM
Joined: Jun 2004 Posts: 2,360 Mobile Alabama S SB412DUSTER top fuel
SB412DUSTER top fuel S Joined: Jun 2004 Posts: 2,360 Mobile Alabama	Quote: Quote: Quote: This is crazy .... i just finished doing this to my GTX I was hoping you could see the picture, it reads wgt 3832 w/ me 190lbs frt 50.5% rear 49.5% lft frt 1000 rgt frt 934 lft rear 974 rgt rear 924 my friend said dont touch a thing Are you sure you dont have the rear numbers mixed up?? That would be my guess That or his friend had the rear wires pluged in the wrong scale.

Re: Question Scales 4 corners [Re: MR_P_BODY] #1297110 09/06/12 01:29 AM 09/06/12 01:29 AM
Joined: May 2003 Posts: 2,117 Cleveland Ohio 10secGTX top fuel
10secGTX top fuel Joined: May 2003 Posts: 2,117 Cleveland Ohio	all the scales were marked as to were they go ....out side of that, I climbed in the car with my helmet and fire jacket on and he set the scale. w/o me car weighs 3637 has a 50.3% frt 49.7 % rear ....hell if i know but i am sure i put the rgt frt and rgt rear in its proper places

Re: Question Scales 4 corners [Re: 10secGTX] #1297111 09/06/12 04:06 AM 09/06/12 04:06 AM
Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio dartman366 I Live Here
dartman366 I Live Here Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio	have to get my notes to give numbers but we had mine within a couple of pound's of being equal in the rear and after a couple of passes I had to add 30# to the right rear. Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.

Re: Question Scales 4 corners [Re: dartman366] #1297112 09/06/12 07:03 AM 09/06/12 07:03 AM
Joined: Jan 2003 Posts: 6,392 nielsville, minn. Q quickd100 master
quickd100 master Q Joined: Jan 2003 Posts: 6,392 nielsville, minn.	I wish my weights were that close. I scaled mine last weekend: DF 1144 PF 1056 DR 800 PR 732 Set up Billy Shope's traction dyno. One full turn of the right rear upper bar and I could get the passenger front tire coming off the ground first. Set it so both front wheels came up at the same time. Dave

Re: Question Scales 4 corners [Re: quickd100] #1297113 09/06/12 11:18 AM 09/06/12 11:18 AM
Joined: Jan 2004 Posts: 8,290 fredericksburg,va C cudaman1969 master
cudaman1969 master C Joined: Jan 2004 Posts: 8,290 fredericksburg,va	Can't remember exact numbers but my 4-link a-arm tube car but they where equal lr rr rf and lf 60# more. I put 250# in drivers seat for me. I added 40# lead under bat box on rr and cranked up spring on lf till equal (not much)four link bars neutral. Then i got in the seat and while watching the digital scales turned the top right bar(had a panel i could remove) to take the slack out but not changing the numbers.It would hook on snot and go straight,2517# with me in it, 5.60 125 in the eight mile just clean the tires and go to line, bam gone.If you try to scale a ladder car you have to take out one bottom bolt on rear. Ladder will hold it in a bind if you don't,crank the springs in front then put the bolt back,done.Either way you want more weight on right rear tire(at launch it rotates lf to rr) its in the old Chrysler manuals. Last edited by cudaman1969; 09/06/12 11:23 AM.

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