Setting up a 4 link

[leftcoast66]

Originally Posted by RunninLo

cap'n,
I may be wrong here but it was always my understanding on the tri 4-link that the "longer" bars were the uppers and were longer to compensate for being mounted at angles instead of straight like on a parallel 4 bar. It was also always my understanding that it was done that way to keep the pivot points on the frame the same distance from the axle and to minimize pinion change.

I see by looking at your pics you went with the short bars up top and have a pretty good distance between your pivot points.

I'm not saying right or wrong just curious why you chose that way and what the benefits are?
TIA,
Josh

From what I understand, yes your right, but its so tiny unless you run a lot of lift, then its not a big deal. If its pretty much set up close to ride height, and the pinion angle is set up right for ride height, which I'm sure captn fab did, then its all good.


Captain, looks very impressive, even though its a kit, the install is incredible. Where in cda are you, I keep hearing your out there, I'm stuck at gonzaga, not too far away.

[Captainfab]

Originally Posted by leftcoast66

From what I understand, yes your right, but its so tiny unless you run a lot of lift, then its not a big deal. If its pretty much set up close to ride height, and the pinion angle is set up right for ride height, which I'm sure captn fab did, then its all good.


Captain, looks very impressive, even though its a kit, the install is incredible. Where in cda are you, I keep hearing your out there, I'm stuck at gonzaga, not too far away.

Yeah if you're at Gonzaga you're not too far away. My shop's kinda on the west side of CdA. Shoot me a pm if you're coming this way sometime.

[kdrodworks316]

I must chime in here, I have seen the captians work first hand, and he is a artist. That frame is just beautiful and I wish it was under my rig.
Now just to clear up a few things, A properly setup double triangulated four link will not change the pinion angle, ever. Now that is only the case when you are dealing with insane amounts of up and down travel. In a street truck app. it is not near as important because your talking 2"-10" of travel as an example vs 30"-50". I am not claiming to know it all about 4 links, but I have dealt with super long travel monster truck suspension to mild travel low rider stuff. A few inches in bar length and and a few degrees in angles can make huge changes at the pinion. I know I will probably get a lashing for this, and I am not saying anyone is wrong or right, but you cant argue with the math and the finished product.

[RunninLo]

No arguement here! sorry if it came off that way. I was mostly trying to continue my own education and am well aware there being more than one acceptable way to "get 'er done"
Josh

PS I"M A DADDY..... 5:32PM sat sealed the deal I'll try to get some pics in Gen D soon.

[PrerunnerRob]

Double triangulated? As in both the uppers and lowers are triangulated?

Originally Posted by kdrodworks316

I must chime in here, I have seen the captians work first hand, and he is a artist. That frame is just beautiful and I wish it was under my rig.
Now just to clear up a few things, A properly setup double triangulated four link will not change the pinion angle, ever. Now that is only the case when you are dealing with insane amounts of up and down travel. In a street truck app. it is not near as important because your talking 2"-10" of travel as an example vs 30"-50". I am not claiming to know it all about 4 links, but I have dealt with super long travel monster truck suspension to mild travel low rider stuff. A few inches in bar length and and a few degrees in angles can make huge changes at the pinion. I know I will probably get a lashing for this, and I am not saying anyone is wrong or right, but you cant argue with the math and the finished product.

[PrerunnerRob]

Congratulations!

Originally Posted by RunninLo

No arguement here! sorry if it came off that way. I was mostly trying to continue my own education and am well aware there being more than one acceptable way to "get 'er done"
Josh

PS I"M A DADDY..... 5:32PM sat sealed the deal I'll try to get some pics in Gen D soon.

[kdrodworks316]

Originally Posted by PrerunnerRob

Double triangulated? As in both the uppers and lowers are triangulated?

yep, top and bottom. its monster truck tech for extra long travel and strength. It would work on street stuff as well with shorter bars. thats why the pinion angle dont change with this setup, the 2 triangles have to work together to travel. The standard setup on most monster trucks is top: frame to center axle and the lower is outside axle to center frame. This also allows massive articulation, so a street app would almost require a swaybar, or properly valved shocks mounted at the correct angle forward and to center. the powerblock site has a 4 link geo download that is a big help for all the math.

[kdrodworks316]

And a huge congrats to the new low rider Daddy! I cant wait to see her Josh

[PrerunnerRob]

Originally Posted by kdrodworks316

yep, top and bottom. its monster truck tech for extra long travel and strength. It would work on street stuff as well with shorter bars. thats why the pinion angle dont change with this setup, the 2 triangles have to work together to travel. The standard setup on most monster trucks is top: frame to center axle and the lower is outside axle to center frame. This also allows massive articulation, so a street app would almost require a swaybar, or properly valved shocks mounted at the correct angle forward and to center. the powerblock site has a 4 link geo download that is a big help for all the math.

I have seen that before on off road 4x4 trucks, and wondered why they trangulated both. It seems to me you would end up with alot of articulation due to the triangulation pivot points, but could induce some non-street friendly handling. My offroad expeierience is more with the 2wd desert trucks, thanks for the info!

[kdrodworks316]

Originally Posted by PrerunnerRob

I have seen that before on off road 4x4 trucks, and wondered why they trangulated both. It seems to me you would end up with alot of articulation due to the triangulation pivot points, but could induce some non-street friendly handling. My offroad expeierience is more with the 2wd desert trucks, thanks for the info!

Your right about the street manors, the length of the bars and a good sway bar should take care of this.

[Captainfab]

Originally Posted by RunninLo

PS I"M A DADDY..... 5:32PM sat sealed the deal I'll try to get some pics in Gen D soon.

Congrats Josh! I hope all is well with Mom and the little one....

[leftcoast66]

Originally Posted by kdrodworks316

Your right about the street manors, the length of the bars and a good sway bar should take care of this.

Interesting, I didn't know that w/ the double triangulated you don't run into pinion angle changes. Thanks for the lil tidbit, learn something everyday.

Congrats about the kid by the way, that's awesome. Hope the kid and mom are doing good.

[1Bad62Pro/Street]

Nice setup Bud! Thinking about just moving foward with my idea of Coil-over, 4-Link rear suspension on my Truck. Has anyone done this on a 1960-62 style frame????
http://67-72chevytrucks.com/vboard/s...d.php?t=315664

POOR MAN---^

RICH MAN--^

[aggie91]

Originally Posted by 1Bad62Pro/Street

Nice setup Bud! Thinking about just moving foward with my idea of Coil-over, 4-Link rear suspension on my Truck. Has anyone done this on a 1960-62 style frame????

The rear frame of the 62 is basically the same at the 67 Captain Fab is doing in his posts above.

[1Bad62Pro/Street]

Any Updates????

[joe231]

yeah, they are in his crew cab thread

[1Bad62Pro/Street]

Sorry Joe,

I was in the wrong tread. Doe! Me needs to pay attention!

[joe231]