Overhauls Of Ex-willall 8sec Drag R32gtr

[9krpm]

That's a beautiful car White but this ex drag car is being made to go faster around corners.

[9krpm]

Modified front upright

[Risking]

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

[Risking]

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

[9krpm]

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.

[9krpm]

[Risking]

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.

[9krpm]

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.

[9krpm]

Car was cut free from the jig last weekend. Time to put the racing carbon armour back on...

[gtr0321994]

^^ porn

[Nur33]

_{Looks tuff as a mother trucker}

[levinboy]

Daaaammmmmnnnnn

[Nightcrawler]

I think you need more camber and rubber mate :) :D

[9krpm]

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

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 July 28, 2013 by 9krpm

[bri73y]

Twin EFR's, 6258 or 6758?

Interested to see how they perform relative to mine.

Bloody nice build by the way.

[Lithium]

Can't wait to see this thing in the flesh - already counting down the days!

[9krpm]

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 September 7, 2013 by 9krpm

[9krpm]

Reassembly phase, testing real soon

[szymonsta]

awesome. take me for a spin at WTAC Mr.T?

;D

[R32GOJIRA]

I tried to send you a PM, but I think your inbox is full.