Jump to content
SAU Community

Recommended Posts

To much localised load being put on that lower pin. It will break the alloy casting.

You need to utilise the original holes and use the original counter bore to locate the component.

I tried that method years ago and broke every upright I did it to

Free advise. Do with it as you wish.

The upper and lower pivots need to be double sheer. The way I do the lowers is to machine an inverted _|_|_ shaped adaptor with a spherical ledge that locates into the original ball joint counter bore.

The edges are drilled to suit the old bolt holes and they are machine with a gusset on the front & back edges the radius' of the corners is very important to strength. I use a 1/2inch aurora rod end mounted vertically with a through bolt and have the lower control arm coming from there.

Do the exact same thing for the inner using the original 4 captive nuts.

For the upper outter I do the following

A similar |_| shaped adaptor with a pin machined from the billet that matches the taper of the upright.

Again it's double sheer and the rod end is mounted vertically with a through bolt.

For the upper inners a [ bracket can be machined and attached to the chassis however you intend to do it (this is the big time and R&D part of my setups that I won't give out)

Again double sheer and a through bolt.

Your method mounts the rod ends horizontally which limits travel and single sheer which loads the pins. The upright is also not strong enough to take the load the pin puts on it when you lower the control arm increasing the leverage ratio.

The upper would be okay the way you've done it but a horizontal rod end is frowned upon.

I'd recommend whoever is doing this have a read of Carroll smiths book "engineered to win"

It's old but Carroll was a legend of race chassis design, everything he ever wrote still rings true today

Much appreciate for the info Brad.

The component used in this conversion is over engineered rather than under. Suspension arms are bigger than usual, 3/4 spherical not 1/2", bearing carrier etc etc. We have opted to go for spherical bearings over rod ends as the guys are not a fan of rod ends in bending, common but weak point in design. For time and cost saving, I've decided to use the oem upright which has very strong bearings. We even had an engineer to look at the bearing and had the a ok with him.

The R35 use the same bearing. So I am confident with this.

Riverside is a very reputable sport sedan and V8 Supercar builder so I have trust in them. The car is welded to a jig, suspension arms placement are carefully calculated from Suspension 3D software for optimal geometry and are built to last. I've not tried to skim on weight here.

It's almost done. I have to give respect to Riverside and not post too much of their R&D up here. You know Liam, send him a message, he's happy to chat with you.

I'm very surprised Liam is doing a single sheer pin like that

He is very familiar with supercar front end design and I'd thought he'd go that little further and do it properly.

The upright and bearing is fine

It WILL break the alloy casting with the lower pin done that way. I've done it several times.

Save yourself the hassle of putting the car into a wall and get him to double sheer it.

I am sorry I have been away for a conference.

It sounds like the OEM upright has an inhertent weakness there. Do you have any pictures of where your previous upright broke Brad?

Anyway I talked to Liam and he said he was planning to double sheered it anyway. They are trying to also design something stronger given your information. Please load up some picture of the previous broken upright Brad.

  • 4 weeks later...
  • 1 month later...

For those that are wondering where we are up to with less than 3 months to go;

20130725_225508.jpg

Brainstorming is completed and my final design/ideas have been sent to the Advanced Composites. A few more kilo of carbon and the car battle armour will be ready for testing ^_^ We should be ready for WTAC in October.

This will be one angry GTR when done. I am finally happy with the final design. Watch this space ;)

In the mean time, gotta work harder to pay for this hobby/carbon lol

Edited by 9krpm
  • Like 1
  • 5 weeks later...
  • 2 weeks later...

I have a little guessing game going on with the link below if anyone keen for a free track ride in this thing

https://www.facebook.com/WorldTimeAttack/posts/676475822364927?notif_t=story_reshare

https://www.facebook.com/photo.php?fbid=621906527829788&set=a.621930421160732&type=1&theater&notif_t=like

Will try to update this thread but probably be after WTAC....under the pump atm.

Edited by 9krpm

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Did this end up working? Did you take some pictures?
    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
×
×
  • Create New...