What can you tell me about this suspension? (pic)

[240marcuSX]

its the xanavi gtr race car. and im just curious about this suspension, its interesting.

[Nismo_Freak]

It's extremely expensive?

[240marcuSX]

i knew that was coming, haha, no i meant more like how does it work, and whats the meaning of having the coilsprings sideways? and how is the weight of the car supported? and what do i have to do to get some brakes like that??

[chmercer]

well, from what I have seen of JGTC cars (read limited information, quite possibly incorrect) , the coilovers are moved closer inboard to accomidate the huge wheels and tires. The coilover acts on the lower arm via a pushrod. I would assume the weight of the car is supported in a similar fashion to double wishbone type suspensions. and to get brakes like that you have to rob a bank.

[skylndrftr]

I'll give this a shot....

it is basically a reworked double wishbone. notice for starters that where you normally see rubber bushings everythign is replaced with rodends or spherical bearings. the brake calipers are mounted where they are to lower the cg (approx 8lb x 4 calipers makes a difference) and are machined from blocks of aluminum (one block per side plus cross bracing you can't see connecting through the cap screws on the caliper) they are obviusly centerlock wheels that use engaging pins which slide in the holes to reduce pitstop times. The rotors are normal iron (i don't believe JTC allows Ti rotors) and are bolted through the nuts you see to an aluminum bell the flat pieces of metal on those are called mclaren sprigns and keep the rotor centered to prevent brake drag whiloe still allowing thermal expansion. The shock itself is laid on its side and isoperated through a rocker and ewither a pushrod or pullrod (you can't tell). putting it there not only lowers the cg but it also allows more tire room and for juggling of all sorts of parameters in suspension set up by creating extra room. The slender little rod that looks like a gas spring for a trunk is actually a linear potentiometer for measuring suspension travel and recording it on the data acq system. the larger blue canister underneath is the shock resivoir/ most likely, the entire upright is a bespoke piece either forged or machined from aluminum and attatched to the pivots through the adjustable top link (piece going from above brake disc to upper control arm. also in the background you can see the gold and the purple machined mouns which seem to be mounting another control arm although i can't really tell from this angle. the black thing in the upper right allows them to raise the steering rack significantly and then have a pivot to allow tierod to hit the upright in the middle where it provides tire clearance. all of that can be adjusted for bumpsteer and toe corrections. The reason for raising the steering rack is to allow for the engine to go down and backwards which is more effective and offsets the penalty of raising the rack which is lighter weight. the little black thing attatched to the inside fender is for attatching an AMB transponder which is used for timing and scoring. hope i got most of it and if i was wrong on anythign feel welcome to correct me this is just eyeball engineering

[240marcuSX]

awesome, i just dont quite how there is suspension travel, given non of the suspension is above the wheel, it looks like there would be none whatsever.

[skylndrftr]

hope this explains it i have asite that explains it well but i gotta find it

[240marcuSX]

oh, ok. that drawing cleared up some issues, thanks for the info, and site if you can find it.

[skylndrftr]

http://www.ukcar.com/features/...e.htm

I should prolly clarify something... the top lin attatches to the top bolt that the stru would normally attatch to, the pullrod attatches to the botom bolt hole (on the upright)

the other end of the upper arm attatches to what appears to be a small sub frame using the upperstru mount and some other points on the unibody as mouts

[aither]

also, notice how the dampener and spring are parallel to the car, instead of up and down? It would be easier to brace the suspension forces if they were aligned with the frame than if they were going off at some weird angle. Could be one reason for the set up.

[crzycav86]

Also, the latest issue of SCCM went into some detail about the jgtc skyline car. It explained parts of the suspension, engine, and aerodynamics of the car. It's pretty clever stuff. Some of you non-subscribers may want to check it out.

[USsil80]

SCCM??? what is that magazine sounds intersting to have a article like that

[crzycav86]

sport compact car magazine

[USsil80]

ahh remeber wich issue

[crzycav86]

April 2005.

You can go to a grocery store and pick it up in a week or two. The newstands usually get their issues a little late.

Lately the quality of the articles has been deteriorating, but I was pleasantly surprised with this issue. I wish they'd work more on project silvia.

[cosmo]

iwhat do i have to do to get some brakes like that??

sell a ****ing kidney?

[USsil80]

yea i think they are going with a bigger turbo... from what they last said about it.. that mag has gone downhill as of late

[cosmo]

that mag has gone downhill as of late

What do you expect with Oldham and Coleman leaving? Too bad, I loved Technobabble

[skylndrftr]

there is actually a proffesor at my school who uses the dave point in class....

[USsil80]

i knew oldham has but not coleman.... anybody know what they are doing

[egan]

http://www.ukcar.com/features/...e.htm

I should prolly clarify something... the top lin attatches to the top bolt that the stru would normally attatch to, the pullrod attatches to the botom bolt hole (on the upright)

the other end of the upper arm attatches to what appears to be a small sub frame using the upperstru mount and some other points on the unibody as mouts

thanks for the link! good read