Senior design project Options

[i love porsche]

hey everyone, i figured id post this here to see what you all thought

I am a ME student at NJIT and for a senior design project, Myself and 2 other students will be redesigning the front suspension of the 914. the goal of the project will be to optimize the structural rigidity of the control arm while decreasing weight, also to try and optimize the camber curves and adjustability for racing use.

prettymuch we would be designing a racing control arm. depending on the results, this may be something that could go into a production run..who knows

what im asking is for donations of stock parts. A arms, shocks, tie rods...

i want to try and recreate a front corner of the car that will be easy to modulate and work on for demonstration and testing purposes.

so let me know your thoughts/ideas

thanks
Aaron

[jd74914]

Very cool Aaron!

Are you trying to optimize the current design and keep the stock mounting points, or are you planning on tailoring the mounts to a more optimally designed solution?

Sorry that I don't have any parts to donate.

James

[Brando]

Design an affordable front-coil-over system (IMG:style_emoticons/default/smile.gif)

[d914]

if the jersey boys don't cough one up, Ive got a four front end just sitting here..

[Borderline]

Great Project! Are you going to do any testing??Baseline/improved?? Or are you going to design an adjustable suspension and let us develop it. I'm in the process of modifying my own, so, sorry no parts to donate.

We expect full progress reports (IMG:style_emoticons/default/aktion035.gif)

[i love porsche]

its going to keep the stock chassis mounting points, but most likely the outer ball joint will be moved for optimization, the reason to keep the stock mounting points is so that it can be a bolt on modification. and im hoping to make it work easitly with both torsion bars and coil overs

[rmital]

what im asking is for donations of stock parts. A arms, shocks, tie rods...

call me (work #):
(973) 435-3792

[neilca]

Let me give you a hint. Extend the lower control arm by 2". Then adjust the spindle angle back to the original. You should now be building camber in your arc.

I read this on a bathroom wall once....

[neo914-6]

Sounds good but why not the take a bigger challenge like the rear control arms?

[i love porsche]

felix...good question...i thought about it and this is why

my group's original idea was to do part of the design for the Formula SAE car we are building, that would create less work for us so we could focus more time on building and getting the car right. unfortunately, since we have the whole FSAE car designed, we didnt get approved for it. so i went with something i knew pretty well and am comfortable working on...if this goes well..maybe i can do somehting for the rear after i graduate...

[LarryR]

How about a double A arm coil over set up on all four corners.

I will dontate my stock front suspension when I pick up a set of 911 struts. I already have the cross member and A arms just need the struts.

[i love porsche]

How about a double A arm coil over set up on all four corners.

I will dontate my stock front suspension when I pick up a set of 911 struts. I already have the cross member and A arms just need the struts.

thought about that too. BUT it wouldnt be a bolt on application, and would also be a bit too much work for next semester

[i love porsche]

so i have a quick need, i need pictures of the front suspension. assembled, unassembled, anything you have...ive done searches like crazy but cant find anything

thanks

[alpha434]

935 suspension. Fully adjustable at all points. Much lighter than 911 parts. Came with a coilover strut, too.

The failure point was the adjustability, a lot of highly modified group 5 cars that were 935 based were failures because of poor suspension geometry after fiddling with the front end too much.

And the original 935 aluminum cross brace was WAY too weak. Everyone replaced it with the 911 steel part, except for exceptionally short races. The part would warp after one or two track days, and would be worthless.

EDIT: I forgot to mention. The 935 suspension is interchangeable with the 911 suspension. I was making this point to say that the end all has been done.


I have a good idea for axles, if you guys want to change up... Composite structure.

[scotty b]

Here ya go. I also have a complete front end if you can't find one locally.Let me know.

[scotty b]

Disassembled

[alpha434]

(IMG:http://mysite.verizon.net/vze1ktsj/sitebuildercontent/sitebuilderpictures/ron_mann_935_01web.jpg)


Here's a bitchin' design project: A "bumpsteer-less" rack. It would have to be able to maintain a pivot point in line with the pivot of the a-arm(s). This could easily be done with hydraulics, but that's daftly inefficient because it necessitates a power steering or similar hydraulic system, and there isn't a mechanical safeguard in the event of failure.

[i love porsche]

(IMG:http://mysite.verizon.net/vze1ktsj/sitebuildercontent/sitebuilderpictures/ron_mann_935_01web.jpg)


Here's a bitchin' design project: A "bumpsteer-less" rack. It would have to be able to maintain a pivot point in line with the pivot of the a-arm(s). This could easily be done with hydraulics, but that's daftly inefficient because it necessitates a power steering or similar hydraulic system, and there isn't a mechanical safeguard in the event of failure.

thanks for the thoughts, but at the moment we have already gone through the approval process. this will also be a lower cost alternative to a 935 suspension

thanks for the pictures

[alpha434]

I don't know why we ever had the standard crap 911 suspension. The 935 is naturally cheaper to produce. The heim ends are all prefab. Just make the mounts and go.

The steering system could be considered suspension. As well as wheels and tires.

Note that the cross beam on this model (this isn't a real 935 suspender. It's an expensive knock-off) is billet aluminum. That really isn't necessary. The stock steel cross works better for strength, and our cars are already biased to the rear, so it doesn't really give a weight advantage unless you can remove equivalent weight from the rear end.

I've been drawing something up that will use motorcycle tires instead of car tires, and with a really aggressive caster angle to make use of the round rubber. End-all, be all would be two hydraulic cylinders to make the car carve like a skier at high speeds and would make the car turn normally at low speeds. And some mixture of both at points in between. Motorcycle brake disks are lighter, as with their calipers. And they would be more than enough to stop cars of our size. Plus very modern sports car options have been available to the masses in the motorcycle world. I.E. carbon brake disks. Motorcycle wheels are much lighter, too.

[ptravnic]

Aaron - Not sure if you already have the factory diagrams for the suspension but just in case you don't, see the link for the parts catalog:

https://techinfo.porsche.com/techinfo/pdf/e...914_KATALOG.pdf


-pt