Adjustable drop links?

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Adjustable drop links?

Post by BALDYMONSTER » 01/02/18 15:55

I have finally bought 2 pairs of adjustable drop links for the MR2.

Now I only have access to a 2 poster ramp so I cannot set these at the correct length for the car as it obviously needs to be sat on all 4 wheels and settled to do this.

The car is lowered 40mm, could I just remove and old drop link and shorten the adjustable ones by 40mm and go with that?

Or do I absolutely have to adjust them when the car is settled on all 4 wheels?

Thanks in advance,

Chris.


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Re: Adjustable drop links?

Post by BALDYMONSTER » 02/02/18 18:57

Bump.
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Re: Adjustable drop links?

Post by BALDYMONSTER » 07/02/18 23:15

Nobody?
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Re: Adjustable drop links?

Post by jimi » 08/02/18 3:50

I'd set them to 40mm less than the standard length, fit them, put the car down on its wheels and check if the ARB is sitting more or less horizontal, if its not adjust them till it is.
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Re: Adjustable drop links?

Post by peteV6R5 » 08/02/18 8:35

if you are using lowering springs on standard struts then the anchor points for the droplinks dont change.
the drop in ride height is above the top anchor point on the suspension legs .
therefore no change is required in length of droplinks.
if you are using coilovers or none standard struts then diff length droplinks are required.
the bottom line is that the rollbar should be horizontal when car is on the ground for best overall performance.
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Re: Adjustable drop links?

Post by m122794 » 08/02/18 11:41

Surely, if you drop the car by 40mm, then the ARB mounts on the underside of the body will be 40mm closer to the ground?? Although the mount-points on the strut won't change in relation to the wheel, they will effectively be 40mm higher than stock requireing a 40mm shortening of the drop-link.
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Re: Adjustable drop links?

Post by BALDYMONSTER » 08/02/18 12:00

I don’t think so buddy, after giving it some thought the drop links will remain the exactly the same as the deal with unsprung weight.
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Re: Adjustable drop links?

Post by m122794 » 08/02/18 13:06

Nah, I'm right :-) Think what happens if you jack one wheel up by 40mm - the equivalent of shortening the spring by 40mm?

The axle rises up 40mm and the end of the rollbar also goes up 40mm dragged up by the droplink. This moves the bit of the rollbar in the wheelarch from the horizontal to an inclined angle with the droplink attachment end sticking up. How do you get it back to horizontal - you shorten the droplink by 40mm.

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Re: Adjustable drop links?

Post by BALDYMONSTER » 08/02/18 14:36

Spoken to rogue Motorsport and they stay the same length as standard drop links as I’m dealing with unsprung weight.

I’ll put it up on a four poster after it’s done and check they are not pulling it pushing at either end of each arb.
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Re: Adjustable drop links?

Post by m122794 » 08/02/18 14:52

Obviously, standard length droplinks will work fine: the ARB will operate just fine but with its ends tilted up a bit. The ARB is there to stop the sprung mass of the car rolling and altering the steering geometry, but the droplinks attach to the unsprung mass (wheels and hub) so we're in agreement there. As long as the spring length is the same on both sides of an axle there will be no net twisting force on the ARB - just a change in its working position.

In fact, due to the need for the droplink to accomodate the steering action of the strut its probably best NOT to use shortened droplinks because this will increase the angle that the balljoints at either end need to turn through as well as the loading on them on full lock and so accelerate wear.

I wasn't suggesting earlier that the droplinks should be shortened - just that you would need to shorten them if you wanted the ARB to rest in its original position with lowering springs.

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Re: Adjustable drop links?

Post by BALDYMONSTER » 08/02/18 14:55

Eh, ok then......
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Re: Adjustable drop links?

Post by BALDYMONSTER » 20/02/18 21:02

Got these fitted after matching the length to the standard drop links.

Car really does feel much better.
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