Project BLUEprint, 1965 Falcon

[Wesley J]

Can I make a quick observation/advice based on my learnings on a similar setup? Make the LCA pick up points adjustable rather than UCA, they're drastically easier to move than the UCA. Plus, with the drastically longer links, the adjustment of one hole diameter results in a much smaller change to the IC.



My $0.02

[Bryce]

Can I make a quick observation/advice based on my learnings on a similar setup? Make the LCA pick up points adjustable rather than UCA, they're drastically easier to move than the UCA. Plus, with the drastically longer links, the adjustment of one hole diameter results in a much smaller change to the IC.

My $0.02

I agree with what you said about smaller changes. However, for street and track setups I want a horizontal LCA to limit roll steer. The upper control arm mount will be slotted so that changes are small. I also has another mounting location on the housing for teh UCA. The LCA has an adjustable mount on the housing for track days at teh strip! I am adjustable for 55% to 130% maybe more if needed.

[Bjkadron]

I agree with what you said about smaller changes. However, for street and track setups I want a horizontal LCA to limit roll steer. The upper control arm mount will be slotted so that changes are small. I also has another mounting location on the housing for teh UCA. The LCA has an adjustable mount on the housing for track days at teh strip! I am adjustable for 55% to 130% maybe more if needed.

Have you considered, instead of slotting the UCA frame side hole, drilling a series of overlapping holes. This would provide the fine adjustment you want, but also positive locating because of the "nubs" and insurance against slippage as well. That is what I'm doing. I can draw it up if I'm not clear.

[Bjkadron]

Here, like this:



it is a little harder to make, but I would say it would be worth it.

[Bryce]

Have you considered, instead of slotting the UCA frame side hole, drilling a series of overlapping holes. This would provide the fine adjustment you want, but also positive locating because of the "nubs" and insurance against slippage as well. That is what I'm doing. I can draw it up if I'm not clear.

I have thought about that but i dont think I can get a fine enough adjustment. Im talking about 1/8" would be fine tuning. Maybe thats the engineer in me being picky, but............

There is no issue with a slot in a vertical direction, or perpendicular to the arm at ride height. There is not much force in the direction of the slot. Another idea is to slot it on an arc so that the arm does not need to have a length change.

[Bryce]

Here, like this:



it is a little harder to make, but I would say it would be worth it.

Now you are just showing off you solidworks skills. NICE!

[Bjkadron]

I have thought about that but i dont think I can get a fine enough adjustment. Im talking about 1/8" would be fine tuning. Maybe thats the engineer in me being picky, but............

There is no issue with a slot in a vertical direction, or perpendicular to the arm at ride height. There is not much force in the direction of the slot. Another idea is to slot it on an arc so that the arm does not need to have a length change.

Yeah 1/8 would be a little absurd, that would be a LOT of holes. I was going to go 1/4 on mine. Or the slotted arc. Actually If I make it on a CNC I might just do a series of holes arc in 1/8" increments! Nothing like over-doing it right?!

Now you are just showing off you solidworks skills. NICE!

Ehh.. Not really, I was just really bored there for a minute, and since I now have it at home... and you can't tell as much because of how I rotated it but the holes are on an arc.

[droptop73]

On a slotted adjustment, would it be too complex to add adjustment screws? They would be parallel to the axis of the slot to control movement and provide micro adjustability.

[Bryce]

Jeff,

I cant picture what you are describing. Maybe if I read it in the morning after some coffee my brain will work.

[jtomas801]

Hey Bryce, the car looks great and I like how you built the watts link setup.

The picture below is what I think Jeff was thinking of, you can turn the screw and the whole pivot point moves up and down.


Jon

[Bryce]

Thanks Jon,

That makes sense now. I dont have the room for a setup like that. That would be cool though.

[Bjkadron]

Wow... I had thought of that for Panhard bar adjustment and such, but never for the actual suspension mounts. Now I'm thinking I can fit that in if I cut the floor just a bit... Very cool idea!

[jtomas801]

Yeah, I was thinking about using it to as the upper link mount instead of my slotted mount. I would have to remake every thing, but will see what happens when I get the roll cage in. It is about $275.00

https://www.circletracksupply.com/pr...3&cat=0&page=1

I haven't gone searching for a cheaper price or a similar piece.

Jon

[Bryce]

Wow... I had thought of that for Panhard bar adjustment and such, but never for the actual suspension mounts. Now I'm thinking I can fit that in if I cut the floor just a bit... Very cool idea!

And you were giving me a hard time for wanting fine adjustments!!!

[Bryce]

Yeah, I was thinking about using it to as the upper link mount instead of my slotted mount. I would have to remake every thing, but will see what happens when I get the roll cage in. It is about $275.00

https://www.circletracksupply.com/pr...3&cat=0&page=1

I haven't gone searching for a cheaper price or a similar piece.

Jon

jon,

Post up a link to your car, I would like to see some pictures.

[Bjkadron]

And you were giving me a hard time for wanting fine adjustments!!!

No No No... I was saying it would be hard to do fine adjustments with the set-up I suggested. most of my adjustment is going to be in my upper link anyway, So I might as well be able to fine tune it. Besides, If I'm going to be a good engineer I have to get used to over-complicating things! Right?
This idea would be really cool. But, the only thing I would want to add is a lock of some sort so it doesn't move during just regular street driving with the vibration and such.

[MichaelUser]

Now you are just showing off you solidworks skills. NICE!

Here is my crude concept to maybe solve your dilemma. I think it could work. Not to complex. this was drawn by me in two minutes. FWTW.

[Wesley J]

I'd agree with Bryce, the arced slot is the best way to go. The force along the long axis of the slot would be minimal so the clamping force provided by a 5/8" fine thread bolt should be much more than required to keep it from moving IMHO.

Bryce, I'm going to agree with you on the roll steer. I found adjustment to my AS to be meaningless as I have such little horsepower, although this wont be the case next year... The adjustments I made were to improve my roll steer, which was pretty bad initially. What I've found is that I'd like more fine tunability now that I'm in the ballpark. The problem is that you wont know the ballpark until spent a bunch of time tuning.

Wes

[jtomas801]

I wish the picture above was from my car, but it is from a chevelle, http://www.chevyhiperformance.com/fe...lle/index.html

Here is the link to my build, http://www.lateral-g.net/forums/show...t=26454&page=6

Have a lot more to do but it is getting there.

Thanks,
Jon

[rixtrix1]

I have thought about that but i dont think I can get a fine enough adjustment. Im talking about 1/8" would be fine tuning. Maybe thats the engineer in me being picky, but............

There is no issue with a slot in a vertical direction, or perpendicular to the arm at ride height. There is not much force in the direction of the slot. Another idea is to slot it on an arc so that the arm does not need to have a length change.

I installed a four link that had 1/8" adjustments provided for 5/8" bolts by having multiple sets of bolt in plates with each set of holes offset from the next. This allowed a full 5/8" of metal between holes so theere could be no slippage. Further modeling and subsequent track testing showed that only two sets of plates and 3 holes made all the difference needed, but provided a positive location for each adjustment used.