Out with the old........in with the new

[eff eff]

[TOV!E]

eff eff said:

Must be such a lovely feeling have a new chassis, every now and then I used to wonder how bad my chassis was in the places I could not see........

[eff eff]

Yep especially when it's a Sportmotive Evolution chassis

[carsy]

Very nice. Evolution chassis, LS3, what more could one ask for.

[stevesprint]

Nice, very very nice,

It's more than just a chassis, includes suspension arms, hubs, uprights, anti-roll bars, steering rack, rollover hoop etc etc. Are the standard driveshafts modified??

I wonder if Ian does supply only for the DIY customers???

[QBee]

Where's the "I want" button when you need it? So in addition to a total respray, retrim and type 3 headlight conversion, I now need to add a Sportmotive Chassid, LS3, T56 or T6060 and suitable drive train to my list.

Where's the "remortgage" button when you need it?

[eff eff]

Standard drive shafts with uprated CV joints, (not in yet) TR6060 6-speed box, 3mm thick stainless chassis stiffening closing plates front and back too

[GlynMo]

Does a 3mm plate of that shape really stiffen the chassis??

[eff eff]

The designer says it does, I guess they wouldn't have gone to the bother of putting there if it had no effect.

[eff eff]

I'm no expert but it's just in front of the diff which is a high stress and fairly open area so maybe helps to resist torsion

Edited by eff eff on Tuesday 14th June 22:50

[GlynMo]

eff eff said:

I'm no expert but it's just in front of the diff which is a high stress and fairly open area so maybe helps to resist torsion

Edited by eff eff on Tuesday 14th June 22:50

Me neither, but I'd have thought that the plate as fitted could flex in any direction. Sorry, not trying to be critical but to understand. I can see that a flat plate (if it were possible to fit one) would prevent the chassis rails moving towards or away from each other but, with the curves in it, I don't see how the fitted one would do even that. Perhaps someone who knows will come along soon.

[QBee]

Looks nice.......and the original has something similar somewhere similar

[davep]

That chassis looks to be very well engineered, especially the extra bracing and redesign in the 'spine' section; which should make it stiffer - nice!

If you don't mind me asking, what did it cost?

[eff eff]

I think there are a few different options so I'll let Ian at Sportmotive www.sportmotive.com give you a price

[griffdude]

FF, your original chassis doesn't look that ropey?

[eff eff]

You're right, apart from a bit of surface rust on the N/S/F upper wishbone the powder coating on my original chassis is intact and just dirty, so why change the chassis? Well we all know how hot the engine bay gets, the 5 litre RV8 was hot but the LS3 is really hot even with a larger ali rad and an increase in the total coolant volume. The new chassis is wider and allows for backward running exhausts which will reduce the under bonnet temperature. The chassis designers took me through a computer programme showing the geometry and behaviour of the original chassis, and then the behaviour of the revised geometry of the Evolution chassis, the revision will give T car handling or better, so happy days.

[portzi]

GlynMo said:

eff eff said:

I'm no expert but it's just in front of the diff which is a high stress and fairly open area so maybe helps to resist torsion

Edited by eff eff on Tuesday 14th June 22:50

Me neither, but I'd have thought that the plate as fitted could flex in any direction. Sorry, not trying to be critical but to understand. I can see that a flat plate (if it were possible to fit one) would prevent the chassis rails moving towards or away from each other but, with the curves in it, I don't see how the fitted one would do even that. Perhaps someone who knows will come along soon.

The torsion forces in the diff has to resonate through some part of the car, l think this plate which has been folded into a top hat and has lightning holes cut in it will take away the resonance forces by it's twisting. A plate will only direct the resonance forces somewhere else where it could do more damage to important parts.

[eff eff]

GlynMo said:

eff eff said:

I'm no expert but it's just in front of the diff which is a high stress and fairly open area so maybe helps to resist torsion

Edited by eff eff on Tuesday 14th June 22:50

Me neither, but I'd have thought that the plate as fitted could flex in any direction. Sorry, not trying to be critical but to understand. I can see that a flat plate (if it were possible to fit one) would prevent the chassis rails moving towards or away from each other but, with the curves in it, I don't see how the fitted one would do even that. Perhaps someone who knows will come along soon.

I had a chat with the designer, I was wrong the plate is not there to increase torsional stiffness that is provided by the cross-bracing. The plate has two functions one to protect the exhaust and second to provide a degree of longitudinal stability preventing spreading of the chassis rails. There is another 3mm thick plate at the front which is flatter and serves a similar purpose.

[anonymous-user]

Thought fabricators used lighter folded plate these days. Looks good though.

[Matthew Poxon]

That will be awesome.

SE Griff
LS3
Evolution chassis



More pictures!