chassis
 

Hi
Yes similar. The LB has the struts in a more upright position rather than inclined inwards as on the mgf.
I've started on mounting my focus rs box to my spare cosworth v6. I've upended the v6 engine and machined a spigot bearing that fits in to the v6 crankshaft. I will now bore this to fit the input shaft on the focus box thus centring it ready to mark out my adaptor plate.
Ian

chassis
 

Hi
I've turned the other end of the spigot jig and fitted to the gearbox. I now need to mate the two together and start on the adaptor plate.
ian

chassis
 

hi

With the jig pressed into the end of the V6's crank I've lowered the M66 gearbox via the splined input shaft onto the engine. this will centralise engine and gearbox.Looks like everything will work. Now on to plot the mounting holes for the adaptor plate. I have the bolt pattern for the v6 block but I can't find the bolt pattern sizes for the Volvo/Ford M66 box anywhere. Anyone have any idea's?

Ian

chassis
 

Hi all

Does anyone who reads this know much about the Vw/audi 02m 6 speed box?
As fitted to the RS3 and cupra.
Been told these can handle more power than the ford focus st/rs box and they are easier to get hold of. Plus spares and LSD's are much cheaper.
I also like that the starter is bolted through the gearbox rather than from the engine side.And it's cable operated like the ford box too.

ian:icon_razz:

Re-reading this I remembered that Hondas of the 80s and 90s used to have very low bonnet lines - and so shorter strut (or wishbone/strut) front suspensions. Nowadays cars have higher bonnet lines to add a couple of inches of crumple for the poor pedestrians who get hit.
I'm no suspension expert but you do get the geometry by drawing a line from the top of the strut and intersecting it with the line created by the bottom wishbone. So I guess just shortening the strut would have an effect on geometry.
http://www.rqriley.com/images/fig-14.gif

chassis
 

Hi

I've seen this diagram before. I would guess if the strut is shortened along the same radius it would still be ok? Looking at the photos I've attached LB's struts look almost vertical.

Ian

shortening struts
 

If you take 2" off this strut and redraw the diagram you can see a big change in the roll centre height and the virtual reaction point.

chassis
 

Hi

You're showing a drawing here of the front suspension. I'm going to copy the front suspension from my deon and it will be the same just new hub carriers.
It's the rear suspension I'm looking at altering. I know that just loping of 2" off will alter the swing radius as you say,this is must be why the LB struts are more upright.To Keep the virtual radius with a shorter strut the same moving the top mounting point out then will surely bring it back in line?
I'm hoping to get my adaptor plate cnc'd either this/next week and will start by building the engine cradle/suspension. I want to keep as close to the deon as possible.

Ian

Hi, by the way - please take my comments about engineering and suspension with a pinch of salt! I don't pretend to know much about either. If you want knowledgable feedback and people aren't answering on here then maybe posting some questions on the middy section of the locust site would get you useful responses. I'm following the discussion with interest.
cheers
Ross

Lancia Montecarlo Scorpion rear suspension
 

Hi, here's the strut rear suspension from a Lancia Mid engine Montecarlo for reference
http://www.motorlegend.com/images-vo...-2-0-45976.jpg

Much the same design as the Montecarlo is the Fiat X1/9. It uses the same uprights, a very wide lower wishbone and a type of adjustable tie rod to give lateral location. In the X1/9 the top of the strut is 790mm high.
http://www.midwest-bayless.com/image...e/17521_2_.jpg

http://www.spiderroadster.com/X39a.jpg

http://www.midwest-bayless.com/image...arge/16862.jpg

chassis
 

Hi

The X19 uprights you show look very similar to the ones I had on a fiat 128 coupe years ago. The 128 coupe was front wheel drive so these arms were bolted to the steering rack. As they were transferred to the back in the mid-engine X19 a fixed stay must have been incorporated to stop rear wheel steer.
The deon uses a lancia beta front upright at the rear with a fixed location built into the rear top wishbone. Metal brackets then bolt to the strut mounting holes to attach the top suspension.
The deon front ones were taken from a fiat 124,and later a lada riva. And unbelievably still available new from lada complete with hub/bearings and brake discs!!
ian

Hi,
yes the Deon (and before that the DGT) were, if magazine articles are correct, fine tuned by a company called Geoscan.
It would be incredibly helpful if someone could do a drawing or simply list all the mesurements of the complete Deon suspension system. From all accounts it is very good.
Of course tyre profiles and engine weights have moved on from the 80s but it is a good starting point.
here are a couple from the Locost site as an example of what I mean:

http://www.locostbuilders.co.uk/gall...cost%20sus.JPG

https://d2t1xqejof9utc.cloudfront.ne...df67/large.jpg

[IMG]https://www.google.co.nz/search?q=locost+suspension+drawing+-+mazda+mx+5&client=firefox-b&sa=X&biw=1440&bih=728&tbm=isch&tbo=u&source=univ &ved=0ahUKEwiM0siDsrHSAhXCH5QKHWaVCHIQsAQIFw#tbm=i sch&q=locost+suspension+drawing+&*&imgdii=r4cVw4yx Y09UuM:&imgrc=KafhWiBCsdZYaM:[/IMG]

http://s46.photobucket.com/user/monk...3copy.jpg.html

chassis
 

Hi

This is a diagram of the deon front suspension. Unlike the locost wishbone where the ball joint screws in or out, the deon ones have the adjustment on both the inner arms where the wishbones bolts to the chassis rather than at the upright. The ball joints were bolted in securely. I guess this allows fine tuning of the upright angle? Both top and bottom wishbones have this arrangement.
The rear wishbones on earlier JHC cars also had this adjustment on both upper and lower wishbones ,but later deon cars had a fixed upper wishbone.
When I come to make my chassis I can draw a diagram and add sizes if anyone is interested.
You're right about the deon/jhc chassis being fine tuned by geoscan.It was said to have been tested at castle combe circuit.

ian

chassis
 

What site are you on for this-might be worth a read-ian

These images were just grabbed randomly via google image search to show how other people had sketched dimensions. However the Locost community in general have lots of discussion about suspension design as they tend to customise their DIY, built from scratch designs using a variety of donor parts.

http://www.locostbuilders.co.uk

https://www.locostusa.com/forums/ (although often the donor parts are USA specific, except for Mazda MX5)

http://sevenesque.com/plans/ (McSorley's site has lots of plans and DIY suspension fine tuning without all the maths advice)

http://www.super7thheaven.co.uk (lots of engine fitment, radically different ideas)

cheers
Ross

chassis
 

Hi

how about this? some guy on FB is designing a chassis for a ferrari on cad/system works. looks similar to the dino one.

ian

An interesting start to a design. Do you have a link to it on FB? At present it just looks like a version of the 1960s Dino design - which was essentially a platform design without much triangulation. It relied on some heavy big tubes and a few basic upright frames. The sports racing Dino 206sp chassis - multi tubular, small tube, augmented by riveted aluminium sheet is a far more advanced design than the road-going Dino 246http://homepages.paradise.net.nz/aca...205chassis.jpg. This is a replica one I saw being built in Invercargill NZ in the '90s.Its a bit like comparing a Dutton to an Ultima.

chassis
 

Hi there

The chassis design he posted was a project for a ferrari f40 he was constructing. The fb page is just titled 'kit cars' and the post show various stages from chassis design and sizes up to a complete car. There are some nice photo's. Check out 'nitescu lon laurentiu'

ian

Ferrari F40 replica
 

Some more F40 links for fun.

here's an F40 replica with twin turbo Toyota V8 - 700BHP made in my home town:
https://www.youtube.com/watch?v=SmZR9ynRPio

the last couple of pages of the factory F40 manual have chassis drawings and dimensions (and suspension views too):
http://axisofoversteer.com/blog/docu...0_USA_1992.pdf