jesusno2 Posted January 14, 2013 Author Report Share Posted January 14, 2013 little upper a arm drawing gonna start on designing a lower arm maybe next weekend and getting roll center/ instant center #'s figured out se what we gotta do to make it handle better. 1 Quote Link to comment
boarlin Posted January 14, 2013 Report Share Posted January 14, 2013 Finished covering the dash today also 2 Quote Link to comment
jesusno2 Posted January 20, 2013 Author Report Share Posted January 20, 2013 Just purchased some SERIOUS and expensive suspension software to dial on the suspension on this truck were gonna be having to make ALOT of changes and hopefuly be able to offer up some nice stuff in the future that actually works not just fancy looking garbage. 1 Quote Link to comment
mrbigtanker Posted January 20, 2013 Report Share Posted January 20, 2013 Just purchased some SERIOUS and expensive suspension software to dial on the suspension on this truck were gonna be having to make ALOT of changes and hopefuly be able to offer up some nice stuff in the future that actually works not just fancy looking garbage. I like were this is heading.cant wait. Quote Link to comment
yello620 Posted January 20, 2013 Report Share Posted January 20, 2013 I like were this is heading.cant wait. X2 Quote Link to comment
Farmer Posted January 20, 2013 Report Share Posted January 20, 2013 Just purchased some SERIOUS and expensive suspension software to dial on the suspension on this truck were gonna be having to make ALOT of changes and hopefuly be able to offer up some nice stuff in the future that actually works not just fancy looking garbage. Ill be right inline when it comes Quote Link to comment
jesusno2 Posted January 21, 2013 Author Report Share Posted January 21, 2013 Well we spent about 6 hours destroying our brains today. learned some interesting facts. Some of the things with the progam we cannot get it to compensate for like how caster angle affects the camber changes during body roll (at least we can't figure it out) Cause we physically tested it on our chassis and it will change for the better. the whole truck system is pretty far outta whack when you lower one. camber roll is really bad with body roll & dive on a lowered truck. So were rackin out brains in trying to get this sorted out. so needless to say a whole new upper control arm mount is gonna need to be fabricated to compensate for this and different control arms all together, But i think the lower arm piviot is ok. 2 Quote Link to comment
]2eDeYe Posted January 21, 2013 Report Share Posted January 21, 2013 Well we spent about 6 hours destroying our brains today. Don't hurt yourself too bad :lol: Quote Link to comment
jesusno2 Posted February 6, 2013 Author Report Share Posted February 6, 2013 So i finished these up today. cross rods for the upper control arms. 1 Quote Link to comment
jesusno2 Posted February 6, 2013 Author Report Share Posted February 6, 2013 Built a fishing tower for a Alumaweld boat this past weekend also, just thought id share to anyone who checks this thread out. Quote Link to comment
thisismatt Posted February 6, 2013 Report Share Posted February 6, 2013 Is it just me, or is your suspension arm going to bind and implode when you cycle it due to the pivots not being aligned on the same axis? For instance, if you made it more extreme and instead of the left member's pivot being ~45° off axis you made it a full 90° it would be obvious that it wouldn't pivot correctly, but I think you have the same issues as they are now. School me, I could very well be wrong. I know it looks like you're using rod ends, but I think there will still be issue unless both members of the arm had pivots at the ball joint end too, but even then I think it would be messing with your KPI or caster through the range of travel. Another way to look at it would be if your arm were to spin 180° around the cross rod, it would want to blow apart at the ball joint end. Of course this would never happen, but you get what I'm sayin? Quote Link to comment
jesusno2 Posted February 6, 2013 Author Report Share Posted February 6, 2013 No idea what your saying lol If your taking about the rod ends crashing into the cross rod I'm going to add a saftey washers and possibly do some grinding. its all experimental so nothing is in stone yet just playing around with adjustability. as far as ball joint angles and stuff i dunno yet still gotta mess around with it i'm waiting on my actuall towers to get cut out before we can put it all together and find whatever issues will rear their ugly heads. Quote Link to comment
jesusno2 Posted February 6, 2013 Author Report Share Posted February 6, 2013 kinda an idea what it will look like Quote Link to comment
thisismatt Posted February 6, 2013 Report Share Posted February 6, 2013 little upper a arm drawing gonna start on designing a lower arm maybe next weekend and getting roll center/ instant center #'s figured out se what we gotta do to make it handle better. Yeah, hard to explain and I can't fully wrap my head around it either without a model or actual mock-up. Let's say this drawing is of the arm at perfectly horizontal/level. The two axes along the mounting bolts allow your arms to point straight to your balljoint mount as desired. If you swing the arm 90° out of the paper, the different axes cause the two rods (if they had solid bushings) to point straight out (perpendicular) of the paper instead of toward the balljoint mount like desired. They are also now twisted about the axes of the rods in clockwise and counter-clockwise directions. You won't ever have your arm pointing 90° from horizontal, but you could see 90° of travel from full droop to full compression and effectively experience the same thing. I suppose the rod ends can account for this without issue perhaps with normal spacers or more likely with high misalignment spacers, but somehow it seems like a bad idea to me...? Quote Link to comment
jesusno2 Posted February 6, 2013 Author Report Share Posted February 6, 2013 I see what your saying. We don't have much travel with coilovers so I'm pretty sure it wont be a concern. And if it is we will cross that bridge when we get their. As for now "on paper" it has lots of room for caster camber changes on the truck. I can physically bolt this on to a stock truck soon as I get one arm tacked up and check rotation. Quote Link to comment
wayno Posted February 6, 2013 Report Share Posted February 6, 2013 He is using what I believe are called heim joints on the spindle end, there will be no binding, as that type of joint is a ball type, not a shaft type. Look at the ends closely in this photo. Quote Link to comment
thisismatt Posted February 6, 2013 Report Share Posted February 6, 2013 Yup, I understand that, I've used them (heim = rod end) - those look like the QA1 teflon lined ends. It just seems like there may be some interesting castor changes through the sweep of travel and possibly binding if not enough misalignment. Quote Link to comment
boarlin Posted February 6, 2013 Report Share Posted February 6, 2013 Yup, I understand that, I've used them (heim = rod end) - those look like the QA1 teflon lined ends. It just seems like there may be some interesting castor changes through the sweep of travel and possibly binding if not enough misalignment. Quote Link to comment
boarlin Posted February 6, 2013 Report Share Posted February 6, 2013 You have a valid point, and we will tac it together and see what angle it will go to before binding, nothing is set in stone yet and only trial and error will tell us for certain if it will work or not Quote Link to comment
jesusno2 Posted February 6, 2013 Author Report Share Posted February 6, 2013 I went and checked the angle on a bottomed out upper arm I getting 25 degrees so our arm should sweep that easy I hope well we see as far ad castor changes through compression that's why its fully adjustable and the towers are completley different that stock so were gonna watch for it. Its still experimental. I do appreciate your input I knew we could possibly have that issue but without testing it I have no way of knowing for sure. This setup is limited to coilover travel. It would not be good for any rock crawling LOL. Quote Link to comment
slodat Posted February 6, 2013 Report Share Posted February 6, 2013 The arm needs to pivot in one plane. Quote Link to comment
thisismatt Posted February 6, 2013 Report Share Posted February 6, 2013 The arm needs to pivot in one plane. lol. Basically what I was getting at, summed up. Although with heims he basically has a virtual axis running through the centers of the balls. Quote Link to comment
boarlin Posted February 6, 2013 Report Share Posted February 6, 2013 http://www.speedwaymotors.com/Race-Chassis-A-Arms-A-Frames-Struts.html?b=r*Part*Suspension+Control+Arm# Quote Link to comment
boarlin Posted February 6, 2013 Report Share Posted February 6, 2013 here is what speedway motors sells, this is what we based and designed ours off of, they must work it they wouldn't mass produce them Quote Link to comment
thisismatt Posted February 6, 2013 Report Share Posted February 6, 2013 True enough Quote Link to comment
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