evora research on clutch

evora research on clutch

Author
Discussion

jfk01

Original Poster:

106 posts

190 months

Thursday 24th October 2013
quotequote all
I'm hearing 40 hours to change a clutch on the Evora !
Would anyone happen to know if the S has the same clutch as the NA ?
I'm thinking that if it does then I may just choose an NA over the S when the time comes for me to choose mine... reasoning that the clutch will be less stressed.
Cheers all .

CTE

1,494 posts

246 months

Thursday 24th October 2013
quotequote all
I think you`ll find if you drive the car in anything like a sensible manner, the clutch will last a long time. If you spend your life slipping the clutch then any clutch will fail prematurely.

BibsTLF

790 posts

213 months

Thursday 24th October 2013
quotequote all
They are different parts to match the different flywheels. The S has a lighter flywheel which makes for better high RPM gearchanges as it drops back quicker allowing for a faster transition between gears.

NA - B132F0015F
S - A132F0139F

The S is £15 cheaper at £115 for the driven plate.

There's no benefit in terms of extra wear from the S clutch but if you were doing a change you would benefit from upgrading an NA flywheel to the S flywheel therefore would need the different clutch assembly to match.

PS Buying a car based on clutch longevity is barmy IMO! Very few owners have needed a clutch and there are cars over 4 years old out there now.

jfk01

Original Poster:

106 posts

190 months

Thursday 24th October 2013
quotequote all
Good info Bibs cheers.
It may appear barmy but researching these things costs me now't and if, in time we see S' s using clutches considerably more than the NA's I'd be happy to have asked the question.

tony993

351 posts

221 months

Sunday 27th October 2013
quotequote all
I think taking clutch change cost into account is reasonable, especially since OP hasn't yet bought an Evora (me neither) & may have the option of some 60,000 mile cars to choose from by the time he's ready.

Correct me if I'm wrong: I think from MY12 the NA cars have the lighter flywheel too.

Dainty Ankles

54 posts

160 months

Sunday 27th October 2013
quotequote all
tony993 said:
Correct me if I'm wrong: I think from MY12 the NA cars have the lighter flywheel too.
Yep you're wrong, the N/A still uses the same flywheel, clutch plate and cover it always has. The 'S' also uses the same as it has always done; there was no change for either for MY12. If you were to change, it would be worth replacing with the 'S' components.

screem

763 posts

207 months

Sunday 27th October 2013
quotequote all
Dainty Ankles said:
Yep you're wrong, the N/A still uses the same flywheel, clutch plate and cover it always has. The 'S' also uses the same as it has always done; there was no change for either for MY12. If you were to change, it would be worth replacing with the 'S' components.
Hi,

Are you sure there was no change to both cars?

Lots of material I've read says the clutch was definitely revised for my12 cars?




Found this on evo about the clutch plate/flywheel:


What is it?

The Lotus Evora S in updated 2012 model year trim. The British sports car company is keen to address criticisms of the model’s trim quality while setting the stall for its upcoming, upmarket range of new sports and supercars. The supercharged Evora S 2+2 you see here costs £64,190.

Technical highlights?

The 3.5-litre V6 has never sounded or felt quite as feisty as its outputs – 276bhp in the regular model, 345bhp in the supercharged ‘S’ – suggest, so a number of tweaks have been made to bring some much-needed zest to its performance.

First, there are new engine mounts, which control the motor’s mass better at low speed and thus allow a more aggressive throttle map.

Second is a revised flywheel and clutch pack that allow it to rev faster. Material has been machined from the flywheel almost halving its inertia, and a lighter clutch-plate mates to it, so the engine revs rise and fall more quickly. Both of these changes benefit the gearshift, and significantly there are now higher-quality cables offering less friction, lowering the shift loads.

Lotus has also discovered the exhaust valve. Turn the key and the Evora S – handsome in optional Starlight Black with gloss black wheels – fires with a flourish before settling to a loping, quiet V6 whirr. The valve comes with a new silencer and opens up at 4700rpm, or from 1500rpm in Sport mode.

Dainty Ankles

54 posts

160 months

Sunday 27th October 2013
quotequote all
screem said:
Hi,

Are you sure there was no change to both cars?

Lots of material I've read says the clutch was definitely revised for my12 cars?
Yes, very sure. The change was never implemented (just like the proposed MY12 gear knob). However, the Exige S V6 did end up using the proposed low inertia flywheel.

Frimley111R

15,844 posts

240 months

Monday 28th October 2013
quotequote all
Lightended flywheels sound like a good idea but they are heavy for a reason. For those who don't know, the weight significantly improves the engine's smoothness by reducing small rev changes, i.e. the engine can't stop the inertia of the flywheel and so the revs stay moe constant, particularly at idle. Whilst it doesn't help in terms or quick rev changes, on a car like the Evora, smoothness is more desirable than quick engine rev changes. Its ok on the Exige as this is much more of a track biased car where the reverse of the above is true.

A number of people fitted the lightened flywheels in Elises and the general feedback was that it just made them harder to drive normally and the gain wasn't worth the cost to fit. I had one in mine and tbh I couldn't tell the difference!

Edited by Frimley111R on Monday 28th October 09:17

tony993

351 posts

221 months

Monday 28th October 2013
quotequote all
Yes, I know. I much prefer a lighter flywheel – sure, you have to work harder to drive smoothly (my girlfriend just couldn’t drive my Ferrari 360 smoothly, even after quite a lot of practice) but if you are a keen driver, a lighter flywheel is best.

I’m in a 2.7 Boxster at the moment. The flywheel is way too heavy for my liking. It really spoils the car.

I think, as well as making a car easier to drive (at a moderate pace), a heavier flywheel also helps fuel economy.

Good info on the MY12 NA flywheel – thanks. I have been patiently waiting for MY12 NAs to become affordable (not that there seem to be many around) but lately I have been thinking, when the time comes, I ought to go for an S.

screem

763 posts

207 months

Monday 28th October 2013
quotequote all
tony993 said:
.......... I have been thinking, when the time comes, I ought to go for an S.
There are not many of those around either! Ive Only seen a very small handful of used MY12 cars advertised for sale (3 i think) other than brand new/demonstrators!!

Frimley111R

15,844 posts

240 months

Tuesday 29th October 2013
quotequote all
screem said:
tony993 said:
.......... I have been thinking, when the time comes, I ought to go for an S.
There are not many of those around either! Ive Only seen a very small handful of used MY12 cars advertised for sale (3 i think) other than brand new/demonstrators!!
Yep, MY12 (started in late 2011) was the time when Evora sales were beginning to be exremely low and with no management cars the number of these around is extremely limited at best. I have one of these cars and although I didn't want a black one I simply didn't have the choice (bearing in mind I also wanted IPS).