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4 linking discussion #1288880 08/20/12 10:54 PM 08/20/12 10:54 PM
Joined: Nov 2010 Posts: 914 tn R robnbird OP super stock
robnbird OP super stock R Joined: Nov 2010 Posts: 914 tn	useing you watch dial as reference. Here is the question , with a 116" whl base. if the angle of the top link rear hole is say @11 and the front hole @ 2 , then with the bottom link rear hole @ say 7 and the front hole @4. now useing these angles how do you think this setting would react. and just discuss how you set your top and bottom links and how the different setting would react to different adjustment. thanks 7343704-0712122050a.jpg (166 downloads)

Re: 4 linking discussion [Re: robnbird] #1288881 08/20/12 11:02 PM 08/20/12 11:02 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	Correction.... I read them backwards Last edited by MR_P_BODY; 08/20/12 11:07 PM.

Re: 4 linking discussion [Re: robnbird] #1288882 08/20/12 11:13 PM 08/20/12 11:13 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: useing you watch dial as reference. Here is the question , with a 116" whl base. if the angle of the top link rear hole is say @11 and the front hole @ 2 , then with the bottom link rear hole @ say 7 and the front hole @4. now useing these angles how do you think this setting would react. and just discuss how you set your top and bottom links and how the different setting would react to different adjustment. thanks [/quote How are you getting 2 on the front top bar and front bottom at 4... you messed up some numbers EDIT For discussion we will say that as a general rule of thump the bottom bar is the height of the IC and the top is length... think of it this way... if you leave the bottom bar along and you lower the top front... what is occurring... it is shortening the IC... now if you move the bottom front it raises the IC.. also iif you move the rear bars away from the axle centerline you gain leverage and will tend to pull wheel stands easier .... also on the IC you need to know where the CG of the car is.... that way the IC will be just behind it to pick up the most weight Last edited by MR_P_BODY; 08/20/12 11:24 PM.

Re: 4 linking discussion [Re: robnbird] #1288883 08/20/12 11:18 PM 08/20/12 11:18 PM
Joined: Aug 2003 Posts: 43,176 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,176 Bend,OR USA	I was told to get a big piece of cardboard to map out a 4 link, 3Ft.x5Ft or longer and measure the hieght and center to center distances on the rear end brackets on both sides and the same on the front mounting holes on the frame, chassis and use the ground as a baseline measuring point. Once that was transferred onto the cardboard make lines from the holes on the rear end to each hole on the chassis and shoot for a intercexting point around 7 inches up from the ground and 51 inches from the centers of the holes on the rear end brackets as a staring point an a 3200 Lb car with 500 HP and a automatic with a trans brake that would run in the mid tens to mid elevens in the 1/4 mile. I was told later to make sure the rear end brackets holes, if not directly above the axle center line should be extended to where they would be directly above the center of the rear end housing The car I treid using that on was 1963 or 1964 Nova with a 585 HP SB Chevy with a turbo 400 in it and a early TCI converter, That car as a slug, it struggle to run mid elevens at the old LACR drag strip It didn't spin the tires ever, it had really big set of M/T ET Street tires, maybe 15x33x15 on 14 inch wide rims We move the intercexting points from 48 inches out and 6 inches up to 53 inches out and 5 inches up, no measureable changes in 60 ft. times or reaction times Maybe we didn't make a big enough change, the owner got discourage and gave up trying to make the car better, it was a Pro Street car that he spent a bunch of money and time on to make it real nice, it was really nice It just didn't run as fast as he wanted Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: 4 linking discussion [Re: MR_P_BODY] #1288884 08/20/12 11:31 PM 08/20/12 11:31 PM
Joined: Nov 2010 Posts: 914 tn R robnbird OP super stock
robnbird OP super stock R Joined: Nov 2010 Posts: 914 tn	Quote: Quote: useing you watch dial as reference. Here is the question , with a 116" whl base. if the angle of the top link rear hole is say @11 and the front hole @ 2 , then with the bottom link rear hole @ say 7 and the front hole @4. now useing these angles how do you think this setting would react. and just discuss how you set your top and bottom links and how the different setting would react to different adjustment. thanks [/quote How are you getting 2 on the front top bar and front bottom at 4... you messed up some numbers well im saying that if you look at my bars back of the car to front. now look at the top bar the read rod end hole would be mounted at 11oclock the front at2 oclock draw a line connecting those point , does that make sense. and the same with the bottom link rear rod end hole at 7 the front of the bottom link rod end hole at 4oclock draw a line . these two angles

Re: 4 linking discussion [Re: Cab_Burge] #1288885 08/20/12 11:34 PM 08/20/12 11:34 PM
Joined: Aug 2009 Posts: 2,042 Mooresburg, Tn ' '72CudaRacer top fuel
'72CudaRacer top fuel ' Joined: Aug 2009 Posts: 2,042 Mooresburg, Tn	Itersecting point too high. Raise the rear of the bottom bar and lower the front of the of the bottom bar just a bit. Then lower the front of the upper bar. Make a invisible line through those two bars and make where they intersect real close to the bottom of the front bumper. Thats how I would start anyway. Brian

Re: 4 linking discussion [Re: robnbird] #1288886 08/20/12 11:38 PM 08/20/12 11:38 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	If you dont want to do the cardboard thing, you might want to pick up a 4 link program... there's a few good ones out there(I think I have them all)... but the bar length comes into play also

Re: 4 linking discussion [Re: robnbird] #1288887 08/20/12 11:42 PM 08/20/12 11:42 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: Quote: useing you watch dial as reference. Here is the question , with a 116" whl base. if the angle of the top link rear hole is say @11 and the front hole @ 2 , then with the bottom link rear hole @ say 7 and the front hole @4. now useing these angles how do you think this setting would react. and just discuss how you set your top and bottom links and how the different setting would react to different adjustment. thanks [/quote How are you getting 2 on the front top bar and front bottom at 4... you messed up some numbers well im saying that if you look at my bars back of the car to front. now look at the top bar the read rod end hole would be mounted at 11oclock the front at2 oclock draw a line connecting those point , does that make sense. and the same with the bottom link rear rod end hole at 7 the front of the bottom link rod end hole at 4oclock draw a line . these two angles First thing when you talk 4 link... you have you hole locations and then you have the IC location so if you say IC thats the intersection of the 2 bars

Re: 4 linking discussion [Re: '72CudaRacer] #1288888 08/20/12 11:48 PM 08/20/12 11:48 PM
Joined: Nov 2010 Posts: 914 tn R robnbird OP super stock
robnbird OP super stock R Joined: Nov 2010 Posts: 914 tn	Quote: Itersecting point too high. Raise the rear of the bottom bar and lower the front of the of the bottom bar just a bit. Then lower the front of the upper bar. Make a invisible line through those two bars and make where they intersect real close to the bottom of the front bumper. Thats how I would start anyway. Brian Ok im goin to try that. im just not getting the hook I think I should get 7343823-0804121858a.jpg (119 downloads)

Re: 4 linking discussion [Re: robnbird] #1288889 08/20/12 11:58 PM 08/20/12 11:58 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	Lets go a little farther here on this... lets talk anti squat line... this is part of the 4-link you wil need to know.... if you take a string and put it at the bottom of the rear tire at the axle an run it up to the back of the cam(close enough) that is the anti squat line... if the IC is above it it will tend to separate the body from the tire/chassis... if its below it tends to give the car squat... and if its on the line it wont do either... so you will need to watch that also.... so between the CG of the car and the anti squat line along with the HP you can come pretty darn close then tweak it from there.. once you find that happy point you wont need more than about 4 different settings(all the rest are useless Also when you talk hole locations they are from the floor(with the drivers weight in seat)on the front and most on the rear will be from axle centerline... just so we're all on the same page

Re: 4 linking discussion [Re: MR_P_BODY] #1288890 08/20/12 11:58 PM 08/20/12 11:58 PM
Joined: Nov 2010 Posts: 914 tn R robnbird OP super stock
robnbird OP super stock R Joined: Nov 2010 Posts: 914 tn	Quote: Quote: Quote: Quote: useing you watch dial as reference. Here is the question , with a 116" whl base. if the angle of the top link rear hole is say @11 and the front hole @ 2 , then with the bottom link rear hole @ say 7 and the front hole @4. now useing these angles how do you think this setting would react. and just discuss how you set your top and bottom links and how the different setting would react to different adjustment. thanks [/quote How are you getting 2 on the front top bar and front bottom at 4... you messed up some numbers well im saying that if you look at my bars back of the car to front. now look at the top bar the read rod end hole would be mounted at 11oclock the front at2 oclock draw a line connecting those point , does that make sense. and the same with the bottom link rear rod end hole at 7 the front of the bottom link rod end hole at 4oclock draw a line . these two angles First thing when you talk 4 link... you have you hole locations and then you have the IC location so if you say IC thats the intersection of the 2 bars Mr p I have a Baseline suspension article. its at baselineSuspensions.com.....Launching a Drag Car. If you look this up you will see a diagram and my suspension is set up just like this . I just changed to this setting and I have not tried it. I just don't want to get to the track and be all out. 7343843-mocar.jpg (90 downloads)

Re: 4 linking discussion [Re: robnbird] #1288891 08/21/12 12:07 AM 08/21/12 12:07 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: Itersecting point too high. Raise the rear of the bottom bar and lower the front of the of the bottom bar just a bit. Then lower the front of the upper bar. Make a invisible line through those two bars and make where they intersect real close to the bottom of the front bumper. Thats how I would start anyway. Brian Ok im goin to try that. im just not getting the hook I think I should get Have you ever had your car on scales... you should so you can get a idea where the at least mid weight of the car is... we can tell you all sorts of points but you would end up working your but off... if you want a guess I would put it at about where your trans mount is... so do the cardboard thing to see what the angles would be Is it spinning or what

Re: 4 linking discussion [Re: MR_P_BODY] #1288892 08/21/12 12:24 AM 08/21/12 12:24 AM
Joined: Nov 2010 Posts: 914 tn R robnbird OP super stock
robnbird OP super stock R Joined: Nov 2010 Posts: 914 tn	Quote: Quote: Quote: Itersecting point too high. Raise the rear of the bottom bar and lower the front of the of the bottom bar just a bit. Then lower the front of the upper bar. Make a invisible line through those two bars and make where they intersect real close to the bottom of the front bumper. Thats how I would start anyway. Brian Ok im goin to try that. im just not getting the hook I think I should get Have you ever had your car on scales... you should so you can get a idea where the at least mid weight of the car is... we can tell you all sorts of points but you would end up working your but off... if you want a guess I would put it at about where your trans mount is... so do the cardboard thing to see what the angles would be Is it spinning or what I will try the cardboard thing first. i think my IC is aboutthe bottom of the shifter which is mounted on the floor of the trans tunnell.

Re: 4 linking discussion [Re: robnbird] #1288893 08/21/12 12:36 AM 08/21/12 12:36 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	I will try the cardboard thing first. i think my IC is aboutthe bottom of the shifter which is mounted on the floor of the trans tunnell. What does it do now.. spin or what

Re: 4 linking discussion [Re: MR_P_BODY] #1288894 08/21/12 01:02 AM 08/21/12 01:02 AM
Joined: Nov 2010 Posts: 914 tn R robnbird OP super stock
robnbird OP super stock R Joined: Nov 2010 Posts: 914 tn	Quote: I will try the cardboard thing first. i think my IC is aboutthe bottom of the shifter which is mounted on the floor of the trans tunnell. What does it do now.. spin or what it spinns more than hooks. 1.36 60ft spinning 15" wids tires 4.88' footbrake. It has a trans brake and I just have not tried it yet. the trans and motor are both new. 5000 stall. coil over set loose .

Re: 4 linking discussion [Re: robnbird] #1288895 08/21/12 01:06 AM 08/21/12 01:06 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: I will try the cardboard thing first. i think my IC is aboutthe bottom of the shifter which is mounted on the floor of the trans tunnell. What does it do now.. spin or what it spinns more than hooks. 1.36 60ft spinning 15" wids tires 4.88' footbrake. It has a trans brake and I just have not tried it yet. the trans and motor are both new. 5000 stall. coil over set loose . Try it on the TB... and bring up the revs... it should plant the tire much better

Re: 4 linking discussion [Re: MR_P_BODY] #1288896 08/21/12 10:38 AM 08/21/12 10:38 AM
Joined: Feb 2003 Posts: 3,456 Out West 4 408strokerdart master
408strokerdart master 4 Joined: Feb 2003 Posts: 3,456 Out West	Quote: Quote: Quote: I will try the cardboard thing first. i think my IC is aboutthe bottom of the shifter which is mounted on the floor of the trans tunnell. What does it do now.. spin or what it spinns more than hooks. 1.36 60ft spinning 15" wids tires 4.88' footbrake. It has a trans brake and I just have not tried it yet. the trans and motor are both new. 5000 stall. coil over set loose . Try it on the TB... and bring up the revs... it should plant the tire much better 4-links need to be shocked to work properly. I know of several that just don't hook off the footbrake that work great when hit off the transbrake.

Re: 4 linking discussion [Re: 408strokerdart] #1288897 08/21/12 10:54 AM 08/21/12 10:54 AM
Joined: Nov 2010 Posts: 914 tn R robnbird OP super stock
robnbird OP super stock R Joined: Nov 2010 Posts: 914 tn	check this out 7344281-4_LINK.pdf (155 downloads) Last edited by robnbird; 08/21/12 10:56 AM.

Re: 4 linking discussion [Re: robnbird] #1288898 08/21/12 01:11 PM 08/21/12 01:11 PM
Joined: Jan 2005 Posts: 2,540 Milwaukee WI T TRENDZ master
TRENDZ master T Joined: Jan 2005 Posts: 2,540 Milwaukee WI	This is a drawing of my cars plot. The center of gravity is found from scaling the car. the height of the center of gravity is one of the points to determine the "anti squat" line. The height of the C/G is projected over the C/L of the front axle. General rules... Any intersection points above the anti squat line will make the axle housing separate from the chassis. Any intersection points below this line will cause the axle to be driven up into the chassis. Any intersection points behind the actual C/G will work well with lower power/TQ combos, and vice versa. 7344461-4linkplot.jpg (124 downloads) "use it 'till it breaks, replace as needed"

Re: 4 linking discussion [Re: TRENDZ] #1288899 08/21/12 01:16 PM 08/21/12 01:16 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: This is a drawing of my cars plot. The center of gravity is found from scaling the car. the height of the center of gravity is one of the points to determine the "anti squat" line. The height of the C/G is projected over the C/L of the front axle. General rules... Any intersection points above the anti squat line will make the axle housing separate from the chassis. Any intersection points below this line will cause the axle to be driven up into the chassis. Any intersection points behind the actual C/G will work well with lower power/TQ combos, and vice versa. Whats your IC length and heights set at..... also how do you move the screen as you have shown... I could never figure how to put the screen on a post Thats 1 of the programs I have also

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