Lotus Exige S 240 Fast Gear Change - Page 2 - LotusTalk

kpbuck · 08-13-2009, 11:56 AM

I have no idea what practical purpose launch control serves.... I can tell you if its not your daily driver the Sector111 motor mounts are the bomb. If it is your daily driver you may not want to go that route particularly if you wear dentures........
My car has launch control - dont plan on using it - with these motor mounts, the right suspension settings, alignment & RTD brace the car shifts as solidly and quickly as my Porsche with GT3 rs clutch and light weight flywheel. The Lotus is never going to be a GT3 RSR so lets not pretend - its just the most amazing track car on the planet...

EricH · 08-13-2009, 03:14 PM

If you have a 240 and you are not feeling it then you are either a slow shifter or not aggresive as us.

It is there, now.. someone tell me where that valve is so I can remove it. My shop manual only has '07 info so there is nothing written. I have the same "CDV" valve on my M3.. its the exact same effect/feel.

kmt63 · 08-13-2009, 08:31 PM

check both the slave cyl and master cyl.slave is on the left forward side the the trans.master is under the left access panel.

MpBrady7 · 08-14-2009, 06:05 AM

I'm not a slow shifter...I may be a little less aggressive though, she's still young in my eyes.

mnsayer · 08-21-2009, 07:49 AM

....... im waiting

i guess no one knows for sure whats going on... we have to get to the bottom of this... this mystery must be solved

Monsi · 08-21-2009, 11:01 AM

Quote:

Originally Posted by mnsayer

....... im waiting

i guess no one knows for sure whats going on... we have to get to the bottom of this... this mystery must be solved

no mystery its the cdv

9$ fix

Lotus Garage - Clutch & Release Mechanism

09 rear clutch pipe

mnsayer · 09-26-2009, 04:23 AM

So is the removal of the CDV easy? and what would be needed to replace it? Has anyone done this??

BadtZ · 09-26-2009, 10:08 AM

So we have to replace the whole cord?
no removable "CDV" in the 240?

I am starting to feel the lag too am starting to shift faster

Monsi · 09-26-2009, 12:50 PM

Quote:

Originally Posted by BadtZ

So we have to replace the whole cord?
no removable "CDV" in the 240?

I am starting to feel the lag too am starting to shift faster

whole cord?

just replace the rear clutch pipe with the 07 version

*Disclaimer*

will probably void the warranty

Bgwilly31 · 09-26-2009, 01:22 PM

Put me in the same boat as Never had a problem shifting.

I shift like schumi and she goes like schumi.

Vishus_1 · 09-26-2009, 10:01 PM

Quote:

Originally Posted by Bgwilly31

Put me in the same boat as Never had a problem shifting.

I shift like schumi and she goes like schumi.

+1 - I have a 2009 260 and haven't noticed any issues with shifting. I came from a 2007 Exige S and had a 2006 NA Exige before that. Although I definately notice the new shifters feel - it has never had a problem with getting into gear. In fact it is a better shifter than the previous two.

mnsayer · 09-27-2009, 02:42 AM

So it seems that no one has done this yet..?? and if so why is it that some people feel the lag and others dont, if all the S240 have the CDV then all should have the same problem.

I might not be able to shift as fast as Schumi

but i have no problems with other cars...

The race instructor at the track as well felt the lag...

Vishus_1 · 09-27-2009, 08:32 AM

Just guessing here but could it be that those who are experiencing this lag have some kind of issue with the CDV - or maybe those of us who aren't experiencing it aren't shifting in the same conditions to have noticed?

I think the only way to resolve this would be to drive another 08+ 240/260 and see if you do or don't notice the lag.

Jack · 09-27-2009, 09:29 AM

Quote:

Originally Posted by mnsayer

So it seems that no one has done this yet..?? and if so why is it that some people feel the lag and others dont, if all the S240 have the CDV then all should have the same problem.

I might not be able to shift as fast as Schumi

but i have no problems with other cars...

The race instructor at the track as well felt the lag...

Get rid of the tube with the cdv .... the difference in clutch engagement and disengagement will be immediately noticeable. It's a very easy fix.

kpbuck · 09-27-2009, 09:35 AM

Quote:

Originally Posted by Vishus_1

Just guessing here but could it be that those who are experiencing this lag have some kind of issue with the CDV - or maybe those of us who aren't experiencing it aren't shifting in the same conditions to have noticed?

I think the only way to resolve this would be to drive another 08+ 240/260 and see if you do or don't notice the lag.

Recently on track coming out of the pit I shifted in to 2nd fully engaged the clutch and punched it - the clutch fully engaged slipped for 10 seconds - to those in the pit it sounded like I missed a shift - when I came back in after a few laps the smell of burnt clutch was unmistakable - called Sector111 and ordered a Ceramic clutch & Fidanza flywheel - which they couldnt deliver so I settled for the Kevlar clutch.
While Mach Motorsports had it apart we talked to Lotus & Sector111 - nobody could confirm the existance of a CDV valve.
Tracked the car at Sebring last weekend and again at PBIR on Wednesday - the new clutch & flywheel performed perfectly
its a mystery unless you come to the conclusion that the stock clutch isnt adequate to begin with...

Jack · 09-27-2009, 10:55 AM

Quote:

Originally Posted by kpbuck

.... called Sector111 and ordered a Ceramic clutch & Fidanza flywheel - which they couldnt deliver so I settled for the Kevlar clutch.
While Mach Motorsports had it apart we talked to Lotus & Sector111 - nobody could confirm the existance of a CDV valve.

It is definitely there on all cars with launch control (on the hydraulic line/tube exiting the slave cylinder) ... I've seen it and I've eliminated it. If you have launch control (and therefore a cdv) and you are a trackster who can perform rapid shifts .... you will feel a difference once the cdv is removed.

BTW, I have never used, nor do I intend to use, launch control on my 2-Eleven.

mnsayer · 09-27-2009, 10:42 PM

Jack when you eliminated the CDV what was needed? did you replace it?

Quote:

Originally Posted by Monsi

whole cord?

just replace the rear clutch pipe with the 07 version

*Disclaimer*

will probably void the warranty

Mr. Oz · 09-30-2009, 07:48 AM

Here is a pic of the CDV off my 2-Eleven and the line I fabricated to replace it. You can just buy a line from toyota. The clutch works much,much better!

Jack · 09-30-2009, 08:27 AM

Quote:

Originally Posted by mnsayer

Jack when you eliminated the CDV what was needed? did you replace it?

What Mr OZ said ....

and ..... We need more photos.

Yes, I did eliminate the cdv -- replaced the line with a stock one. The cdv is nothing more than a 'restrictor' added to the stock line/tube, which reduces the flow of hydraulic (brake) fluid into the slave cylinder delaying the responsiveness of the clutch (both engagement and disengagement).

Photos below show the hydraulic line/tube with cdv and a stock tube ...
photo #1-- line/tube w/cdv; photo #2 -- line/tube as found on all cars w/o launch control.

Also, as mentioned above, cdv removal may present a warranty issue for you as you have a street car.

mnsayer · 10-04-2009, 12:17 AM

Thanks for the help... What's the part number??

08-13-2009, 11:56 AM	#21 (permalink)
kpbuck Registered User Join Date: Jul 2009 Location: Fort Lauderdale Posts: 62	I have no idea what practical purpose launch control serves.... I can tell you if its not your daily driver the Sector111 motor mounts are the bomb. If it is your daily driver you may not want to go that route particularly if you wear dentures........ My car has launch control - dont plan on using it - with these motor mounts, the right suspension settings, alignment & RTD brace the car shifts as solidly and quickly as my Porsche with GT3 rs clutch and light weight flywheel. The Lotus is never going to be a GT3 RSR so lets not pretend - its just the most amazing track car on the planet... __________________ 08' Exige 240 s track pack LSD - the track car 05' 997 s Werks1 boxes, tubi exhaust, GIAC tweaked with everything Champion Motorsports could find laying around to bolt on w/ GT3 rs clutch & lightweight flywheel - formerly known as the track car -now the daily driver 05' Range Rover - the beast of burden www.parkplacecarsecure.com

08-13-2009, 03:14 PM	#22 (permalink)
EricH Registered User Join Date: Nov 2007 Location: Dallas, Texas Posts: 621	If you have a 240 and you are not feeling it then you are either a slow shifter or not aggresive as us. It is there, now.. someone tell me where that valve is so I can remove it. My shop manual only has '07 info so there is nothing written. I have the same "CDV" valve on my M3.. its the exact same effect/feel. __________________ Click links to see my 2008 Lotus Exige-S 240 , '99 M3, 505rwhp '89 Mustang ( sold) , '05 WRX STI ( sold) homepages or here for my M3 vid (11MB)

08-13-2009, 08:31 PM	#23 (permalink)
kmt63 Elise Driver Join Date: Jun 2008 Location: vancouver wa Posts: 391 Images: 2	check both the slave cyl and master cyl.slave is on the left forward side the the trans.master is under the left access panel. __________________ rls west~nci motor sports fabrication

08-14-2009, 06:05 AM	#24 (permalink)
MpBrady7 IDK Join Date: Nov 2008 Location: Evansville, IN Posts: 138	I'm not a slow shifter...I may be a little less aggressive though, she's still young in my eyes. __________________ Proudly Engineering for TOYOTA 2008 Persian Blue Exige S240 2005 Suzuka Blue Honda S2000 - Sold

09-26-2009, 10:08 AM	#28 (permalink)
BadtZ Exige S240 Join Date: May 2009 Location: Vancouver, BC Posts: 123	So we have to replace the whole cord? no removable "CDV" in the 240? I am starting to feel the lag too am starting to shift faster __________________ Larini 6" Sport, DBW Pedals...and minor stuff So far so good

08-21-2009, 07:49 AM	#25 (permalink)
mnsayer 2008 Exige S 240 KUWAIT Join Date: Mar 2008 Location: Kuwait Posts: 54	....... im waiting i guess no one knows for sure whats going on... we have to get to the bottom of this... this mystery must be solved

09-26-2009, 04:23 AM	#27 (permalink)
mnsayer 2008 Exige S 240 KUWAIT Join Date: Mar 2008 Location: Kuwait Posts: 54	So is the removal of the CDV easy? and what would be needed to replace it? Has anyone done this??

09-26-2009, 01:22 PM	#30 (permalink)
Bgwilly31 Twisties Addict Join Date: Mar 2005 Location: Cincy, OH Posts: 1,880	Put me in the same boat as Never had a problem shifting. I shift like schumi and she goes like schumi. __________________ -*White Rossion Q1* 07 white Exige S--Sold 04' Lexus Turbo IS300 BSM "track car"--SOLD "Straight lines dont mean sh"

09-27-2009, 02:42 AM	#32 (permalink)
mnsayer 2008 Exige S 240 KUWAIT Join Date: Mar 2008 Location: Kuwait Posts: 54	So it seems that no one has done this yet..?? and if so why is it that some people feel the lag and others dont, if all the S240 have the CDV then all should have the same problem. I might not be able to shift as fast as Schumi but i have no problems with other cars... The race instructor at the track as well felt the lag...

09-27-2009, 08:32 AM	#33 (permalink)
Vishus_1 Super charged! Join Date: Dec 2006 Location: Missouri Posts: 1,038 Images: 62	Just guessing here but could it be that those who are experiencing this lag have some kind of issue with the CDV - or maybe those of us who aren't experiencing it aren't shifting in the same conditions to have noticed? I think the only way to resolve this would be to drive another 08+ 240/260 and see if you do or don't notice the lag. __________________ 2009 Exige 260 SPORT - Chrome Orange / Carbon Fiber / Black with the mustache Purchased through St Louis Motorsports

09-30-2009, 07:48 AM	#38 (permalink)
Mr. Oz never enough power! Join Date: Oct 2005 Posts: 243	Here is a pic of the CDV off my 2-Eleven and the line I fabricated to replace it. You can just buy a line from toyota. The clutch works much,much better! Attached Images __________________ Dan 08 2-Eleven Launch Edition

10-04-2009, 12:17 AM	#40 (permalink)
mnsayer 2008 Exige S 240 KUWAIT Join Date: Mar 2008 Location: Kuwait Posts: 54	Thanks for the help... What's the part number??

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