[PV=nRT]

Lotus's Chief Engineer Matthew Becker explains difference in suspension used on the NA and in the Evora S. This probably has already been posted, if so I apologize.

 

[Chhirowolf]

That was great.
Have not seen that one, thanks for posting

 

[brgelise]

Very informative. It's the bushings giving the compliance and thus the "weak" link at the track with the lateral compliance causing the wheels to rub on my car. Looks like I'll be hunting for a "s" in a few years when some of the rich folks unload theirs! By then I should be able to drive the snot out of my NA and it will be like a suspension/power upgrade on my car. Of course if those bushings become available and install cost isn't ridiculous.....

 

[Julian73]

Not that I have any such knowledge on difficulty of bushing changes for this car, but would suspect it's very doable.

 

[dmpriso]

I'd love to drive at Laguna Seca one day ...

 

[MTLDean]

I thought the base 2012s and on had the same damper and suspension settings as the S?

 

[JungleJim]

Awesome power slides! I know which one I'm buying.

 

[Julian73]

I'd love to drive at Laguna Seca one day ...

yesterday I just came home from the Skip Barber school there. As my son said the unofficial name of the school should not be "grip management" but rather "fear management" what with driving into the blue sky, trusting that the road will be to your left.

We digress from the thread!

I thought the base 2012s and on had the same damper and suspension settings as the S?

They do, yet most of the NA Evoras on the road are pre 12's

 

[axm]

another reference to Evora S suspension change was the NYTimes' article on the S. It is amazing that half an mm change was important enough for cash strapped Lotus to invest in a whole new part. I love that lotus has their priorities right. Spend on brakes, handling, suspension and feel - not on gimmicks as many companies are moving towards - e.g. carbon fiber roof on a 4000 lb monster!

How deep is Lotus’s obsession with handling? Well, the Evora S press materials note that relative to the nonsupercharged Evora, this car uses a larger-diameter rear antiroll bar — a whole half-millimeter larger. That’s the kind of difference that used to be ascribed to manufacturing tolerances.

A Priority of Cornering Over Horsepower
http://www.nytimes.com/2012/08/05/a...iority-of-cornering-over-horsepower.html?_r=0

 

[Julian73]

1/2 mm is significate as ARB torsional stiffness is proportional to diameter to 4th power.

 

[MTLDean]

1/2 mm is significate as ARB torsional stiffness is proportional to diameter to 4th power.

LOL excellent

 

[missileman120]

They do, yet most of the NA Evoras on the road are pre 12's

Just to confirm I'm understanding this right: The 2013 NA Evora has the same suspension as the S? I sure hope that is the case since mine is a '13 & was actually built in '13.

 

[Julian73]

Just to confirm I'm understanding this right: The 2013 NA Evora has the same suspension as the S? I sure hope that is the case since mine is a '13 & was actually built in '13.

That is my understanding, just to confirm you can search the parts lists (try an online one as they are newer than what can be downloaded and check PN's.

1st May 2013 Parts Manual summary:

"Introduction of the ‘12 model year Evora range and S with IPS transmission
(Supercharged with Intelligent Precision Shift). (Non USA): August 2011VIN character 10 = C Serial number restarts at 0001, common to all.
VIN character 7 indicates the engine specification.
T = naturally aspirated (Manual or IPS).
S = supercharged (Manual or S with IPS transmission) variants.
... Suspension Wishbones and rear anti-roll bars: ’12 model year IPS and S with IPS
transmission vehicles are fitted with the ‘S’ type wishbones and larger diameter rear
anti-roll bar. This will also be implemented as a production running change to naturally
aspirated manual vehicles at a later date. ..."

My May 2013 Parts Book does not have an edit to the suspension pages since May 2012 and still only calls out '12+ S , ISP S, ISP NA as having bushing changes and in fact ARB change only fro S and S ISP models. So don't know VIN number that all cars got the new bushings. or 21.5 mm dia R ARB

 

[missileman120]

That is my understanding, just to confirm you can search the parts lists (try an online one as they are newer than what can be downloaded and check PN's.

1st May 2013 Parts Manual summary:

"Introduction of the ‘12 model year Evora range and S with IPS transmission
(Supercharged with Intelligent Precision Shift). (Non USA): August 2011VIN character 10 = C Serial number restarts at 0001, common to all.
VIN character 7 indicates the engine specification.
T = naturally aspirated (Manual or IPS).
S = supercharged (Manual or S with IPS transmission) variants.
... Suspension Wishbones and rear anti-roll bars: ’12 model year IPS and S with IPS
transmission vehicles are fitted with the ‘S’ type wishbones and larger diameter rear
anti-roll bar. This will also be implemented as a production running change to naturally
aspirated manual vehicles at a later date. ..."

My May 2013 Parts Book does not have an edit to the suspension pages since May 2012 and still only calls out '12+ S , ISP S, ISP NA as having bushing changes and in fact ARB change only fro S and S ISP models. So don't know VIN number that all cars got the new bushings. or 21.5 mm dia R ARB

Just pulled out my digital caliper & measured the rear ARB...came out to 21.8mm. :clap: I measured by the bend next to the RR wheel, as it was fully exposed (no heat shielding). For reference, my car is an April 2013 build in case anyone researches this in the future.