Fabrication Parts

[Nationalmilkman]

So the strut with still turn, right? What does it add the the setup of the suspension, though?

[mb7050]

Double wishbone designs allows to carefully control the motion of the wheel throughout suspension travel, controlling such parameters as camber angle, caster angle, toe pattern, roll center height, scrub radius, scuff and more.

The advantage of a double wishbone suspension is that it is fairly easy to work out the effect of moving each joint, so the kinematics of the suspension can be tuned easily and wheel motion can be optimized. It is also easy to work out the loads that different parts will be subjected to which allows more optimized lightweight parts to be designed. They also provide increasing negative camber gain all the way to full jounce travel unlike the MacPherson strut which provides negative camber gain only at the beginning of jounce travel and then reverses into positive camber gain at high jounce amounts.

Double wishbones are usually considered to have superior dynamic characteristics as well as load-handling capabilities, and are found on higher performance vehicles. Examples of makes in which double wishbones can be found include Alfa Romeo, Honda and Mercedes-Benz. Short long arms suspension, a type of double wishbone suspension, is very common on front suspensions for medium-to-large cars such as the Honda Accord, Peugeot 407, or Mazda 6/Atenza, and is very common on sports cars and racing cars.

BMW too seems to be switching from mc struts to a double wishbone setup(new 5 series for example)



...Nissan GTR style double wishbone setup (just a sketch)

[MR2]

wow I like it

[slage]

i like it!

[TT Eric]

Anything that make our car significantly lighter and improve handling and allow me to keep my actual Coilover and actual wheels (no major offset change) I'm interested. It would be very cool to 'update' our cars.

Eric

[MR2]

Anything that make our car significantly lighter and improve handling and allow me to keep my actual Coilover and actual wheels (no major offset change) I'm interested. It would be very cool to 'update' our cars.

Eric

See, this is where we're stuck, with the design that has the bar that runs up to above the Tyre it's seriously impacting on Tyre wall room, which is why skylines etc usually have offsets around +10 and 0, this impingement on the guard space will also hinder using wider tires... BUT

if your going to all the effort of doing this stuffing around, your going to need new rims, probably new shocks. the reason this works for the skylines I ASSUME, is that they have the shock towers further inboard...

How the offset effects the car's tracking would be more to do with the knuckle design wouldn't it?

need the un-even A, with both of the arms mounting below the tyre line with just the shock sticking through as per normal (similar to the design I posted, but with the shock between the legs of the A as opposed to the hole in the center.

[mb7050]

^ much like our front suspension. 'un-even' A desing is prity much a must I think...

not really..many ways to do it
you get the idea



idk I have to take a look at the front suspension tomorrow

[markoverclock]

ya i forgot about it turning, i could still make it swivel on top. But i really dont want to. So we are looking at top of a-arm or using the wishbone adapter on lower. I was thinking of using dsm coilovers. But still need to get my car home and start measuring things up. i would like to increase the distance from tire to strut but dont know if that will be able without welding more to the car. If we use the same top adapter then we are limited to how much angle we could place the struts. therefore limiting the clearance.

[MR2]

idk I have to take a look at the front suspension tomorrow

exactly...pretty much your only option, and notice how the upper A arm is mounted to the subframe, not the rails themselves? that is something I think we'd need to keep. not impossible, just weld onto the subframe and wrap around the frame rails etc
I'd not be worrying about keeping the stock stock setup as anyone going THIS far won't be running their car 90% of the time on the road, and if they do they are going to be OK with some additional stiffness, you should be fine keeping the top mount though and with a custom lower mount that uses the normal coilover mount points in theory most people with coil overs could stick with them...

[mb7050]

using the wishbone adapter on lower.

^this definitely because I´m thinking that mounting the shock to the upper arm would shorten the travel too much

you could gain little more room Strut vs Tire by mounting the strut more inboard