Another 997tt clutch question
#16
skyak, I am beginning to think it is what it is. Plus, the Sachs 2.5 supposedly puts it even higher than stock. Maybe if you do the GT2 setup then lengthen the shaft once you do not have the hydraulic assist. Can the GT2 setup be done with the engine in?
#17
Just found the instructions for the Evom kit. Looks like it can be done with Tranny in, and since my clutch is new, no reason to drop it. Looks like one line plug might be a bitch as it is in a tight place, but other than that, pretty straight forward. Got to flush it real well and get all the Pentosin out. One guy said it made his clutch engage much lower, which is what I want.
#18
Burning Brakes
Just found the instructions for the Evom kit. Looks like it can be done with Tranny in, and since my clutch is new, no reason to drop it. Looks like one line plug might be a bitch as it is in a tight place, but other than that, pretty straight forward. Got to flush it real well and get all the Pentosin out. One guy said it made his clutch engage much lower, which is what I want.
There are two lines you have to plug on the power steering pump it self. You also have to take the power steering pump apart and remove the gear that makes pressure for the stock slave set up.
#19
Burning Brakes
Can you post the parts list and rough cost for this GT2 clutch setup? Like others, I do not like the standard clutch feel. I have a Boxster S in addition to the turbo and going between the two it is annoying to relearn the release points, just stalled the Boxster the other day
Stock clutch master cylinder 997-423-171-50 (you do not need to change out your stock clutch master but its a good idea just to make sure there is no old fluid stuck in there which would eat away at the new slave cylinder seals)
Clutch assist spring 996-423-081-18
Slave cylinder hose 996-423-377-90
Clutch fluid cap 996-355-119-01 (says dot 4 instead of CH-11)
GT2 clutch fork 997-116-086-90
All these parts come to about $650.00 so pretty cheap swap if done as a DYI. At a shop this swap would cost roughly 2k since you have to remove the transmission to install the clutch fork
#20
Wonder why the Evom setup does not include the fork? Your way is much cheaper, I will say that. 650.00 for the parts plus the fork. Might wait till time to replace clutch, or do the everything but the fork until I change the clutch.
http://www.evoms.com/EVOMS_GT2_Clutc...clugt2slck.htm
http://www.evoms.com/EVOMS_GT2_Clutc...clugt2slck.htm
#21
Burning Brakes
Wonder why the Evom setup does not include the fork? Your way is much cheaper, I will say that. 650.00 for the parts plus the fork. Might wait till time to replace clutch, or do the everything but the fork until I change the clutch.
http://www.evoms.com/EVOMS_GT2_Clutc...clugt2slck.htm
http://www.evoms.com/EVOMS_GT2_Clutc...clugt2slck.htm
650.00 includes the gt2 clutch fork,
On the 997turbo stock set up the clutch fork gets pushed on the right side, the gt2 fork is flipped the other way and gets pushed on the left, The evoms set up keeps the slave in the stock 997turbo location, It comes with a custom bracket to hold the slave, this is why it doesnt come with the gt2 fork
The evoms is designed so you do not have to drop the transmission and you do not have to drill/tap either
https://www.6speedonline.com/forums/...onversion.html here is a link to the tapping, this is on a 996 but same thing
#22
if you want to keep your p/s stock i have a couple p/s units from my 996tt already modded. one with the coupler removed and one with the coupler still in the backside. i have a reservoir as well
#23
Race Car
The stock assisted clutch should not be inconsistent in engagement point. If it is, the slave is on its way out. BTDT on a 996TT that has the same setup as a 997TT.
One way to lower the engagement point of a hydraulic clutch is to introduce an air gap above the clutch pedal rod. Not saying that is a good idea and the first inch of clutch travel will be much lighter, but it is *possible*.
Dan
One way to lower the engagement point of a hydraulic clutch is to introduce an air gap above the clutch pedal rod. Not saying that is a good idea and the first inch of clutch travel will be much lighter, but it is *possible*.
Dan
#25
Rennlist Member
650.00 includes the gt2 clutch fork,
On the 997turbo stock set up the clutch fork gets pushed on the right side, the gt2 fork is flipped the other way and gets pushed on the left, The evoms set up keeps the slave in the stock 997turbo location, It comes with a custom bracket to hold the slave, this is why it doesnt come with the gt2 fork
The evoms is designed so you do not have to drop the transmission and you do not have to drill/tap either
https://www.6speedonline.com/forums/...onversion.html here is a link to the tapping, this is on a 996 but same thing
On the 997turbo stock set up the clutch fork gets pushed on the right side, the gt2 fork is flipped the other way and gets pushed on the left, The evoms set up keeps the slave in the stock 997turbo location, It comes with a custom bracket to hold the slave, this is why it doesnt come with the gt2 fork
The evoms is designed so you do not have to drop the transmission and you do not have to drill/tap either
https://www.6speedonline.com/forums/...onversion.html here is a link to the tapping, this is on a 996 but same thing
#26
Burning Brakes
#27
dprantle, mine is not in a different position everytime I engage it, it just engages very very high on the stroke. My 997.2C engages an inch or two off the floor, my 997tt engages over 10 inches off the floor and when fully engaged (all the way out) there is very little freeplay, if any. Was reading a thread on here that a guy installed a high end clutch that could handle 1200 hp, he was running 700. Trashed it in a month. When pedal all the way, clutch was not fully engaged and was rubbing, heating up and trashed it.
When mine is fully engaged, it is pretty much all the way out and my foot off it. So, no freeplay on the back end. 3 issues. 1. I simply do not like it. I go between both cars and it irritates the hell out of me. Never had a car engage that high on a clutch and it is not right, but this was how it was made for some dumbass reason. 2. No matter where it engages, even if it engages where my 997.2C does, I still do not like the feel of it. I have done some racing, and owned a series of performance cars, Lotus, Ferrari, etc...and of course, 5 Porsches. I have never driven a car with such a disconnected feeling between the driver and car in regards to clutch. Somehow, I feel, the hydraulic assist takes something away. Most driving is instinct, you feel with your body what the car is doing. I have lost that connection with this clutch for some reason, plus it just sucks in general. Cant launch it worth a crap either. 3. A little worried my clutch is not fully engaging when all the way out as the engagement point is so high.
So, a GT2 setup will cure the disconnected feeling. It will increase pressure some, but my 997.2c is a little harder to push, but is fine. Everyone who did the GT2 setup on the 997tt seems to love it, and the clutch is the number 1 complaint on the 997 (water jacket epoxy is a design flaw, is also an issue, but does not effect drivability until it pukes out all your coolant in 10 seconds.). When I do the conversion (not if, when at this point, it will get done), I will mess around some with rod lengths, etc. and see if I can get the engagement lower.
Any idea why everyone says the Evom kit is an 8 hour job? Does not look 8 hours to me, but what do I know.
When mine is fully engaged, it is pretty much all the way out and my foot off it. So, no freeplay on the back end. 3 issues. 1. I simply do not like it. I go between both cars and it irritates the hell out of me. Never had a car engage that high on a clutch and it is not right, but this was how it was made for some dumbass reason. 2. No matter where it engages, even if it engages where my 997.2C does, I still do not like the feel of it. I have done some racing, and owned a series of performance cars, Lotus, Ferrari, etc...and of course, 5 Porsches. I have never driven a car with such a disconnected feeling between the driver and car in regards to clutch. Somehow, I feel, the hydraulic assist takes something away. Most driving is instinct, you feel with your body what the car is doing. I have lost that connection with this clutch for some reason, plus it just sucks in general. Cant launch it worth a crap either. 3. A little worried my clutch is not fully engaging when all the way out as the engagement point is so high.
So, a GT2 setup will cure the disconnected feeling. It will increase pressure some, but my 997.2c is a little harder to push, but is fine. Everyone who did the GT2 setup on the 997tt seems to love it, and the clutch is the number 1 complaint on the 997 (water jacket epoxy is a design flaw, is also an issue, but does not effect drivability until it pukes out all your coolant in 10 seconds.). When I do the conversion (not if, when at this point, it will get done), I will mess around some with rod lengths, etc. and see if I can get the engagement lower.
Any idea why everyone says the Evom kit is an 8 hour job? Does not look 8 hours to me, but what do I know.
#28
I will say now that since I replaced my slave with a new one just in this past week. The engagement point is very consistent and I can feel more easily now where it engages. Still engages high on the pedal but feels better. My slave must have been going bad for some time as the engagement point always felt inconsistent and sort of mushy up until now.
#29
Burning Brakes
dprantle, mine is not in a different position everytime I engage it, it just engages very very high on the stroke. My 997.2C engages an inch or two off the floor, my 997tt engages over 10 inches off the floor and when fully engaged (all the way out) there is very little freeplay, if any. Was reading a thread on here that a guy installed a high end clutch that could handle 1200 hp, he was running 700. Trashed it in a month. When pedal all the way, clutch was not fully engaged and was rubbing, heating up and trashed it.
When mine is fully engaged, it is pretty much all the way out and my foot off it. So, no freeplay on the back end. 3 issues. 1. I simply do not like it. I go between both cars and it irritates the hell out of me. Never had a car engage that high on a clutch and it is not right, but this was how it was made for some dumbass reason. 2. No matter where it engages, even if it engages where my 997.2C does, I still do not like the feel of it. I have done some racing, and owned a series of performance cars, Lotus, Ferrari, etc...and of course, 5 Porsches. I have never driven a car with such a disconnected feeling between the driver and car in regards to clutch. Somehow, I feel, the hydraulic assist takes something away. Most driving is instinct, you feel with your body what the car is doing. I have lost that connection with this clutch for some reason, plus it just sucks in general. Cant launch it worth a crap either. 3. A little worried my clutch is not fully engaging when all the way out as the engagement point is so high.
So, a GT2 setup will cure the disconnected feeling. It will increase pressure some, but my 997.2c is a little harder to push, but is fine. Everyone who did the GT2 setup on the 997tt seems to love it, and the clutch is the number 1 complaint on the 997 (water jacket epoxy is a design flaw, is also an issue, but does not effect drivability until it pukes out all your coolant in 10 seconds.). When I do the conversion (not if, when at this point, it will get done), I will mess around some with rod lengths, etc. and see if I can get the engagement lower.
Any idea why everyone says the Evom kit is an 8 hour job? Does not look 8 hours to me, but what do I know.
When mine is fully engaged, it is pretty much all the way out and my foot off it. So, no freeplay on the back end. 3 issues. 1. I simply do not like it. I go between both cars and it irritates the hell out of me. Never had a car engage that high on a clutch and it is not right, but this was how it was made for some dumbass reason. 2. No matter where it engages, even if it engages where my 997.2C does, I still do not like the feel of it. I have done some racing, and owned a series of performance cars, Lotus, Ferrari, etc...and of course, 5 Porsches. I have never driven a car with such a disconnected feeling between the driver and car in regards to clutch. Somehow, I feel, the hydraulic assist takes something away. Most driving is instinct, you feel with your body what the car is doing. I have lost that connection with this clutch for some reason, plus it just sucks in general. Cant launch it worth a crap either. 3. A little worried my clutch is not fully engaging when all the way out as the engagement point is so high.
So, a GT2 setup will cure the disconnected feeling. It will increase pressure some, but my 997.2c is a little harder to push, but is fine. Everyone who did the GT2 setup on the 997tt seems to love it, and the clutch is the number 1 complaint on the 997 (water jacket epoxy is a design flaw, is also an issue, but does not effect drivability until it pukes out all your coolant in 10 seconds.). When I do the conversion (not if, when at this point, it will get done), I will mess around some with rod lengths, etc. and see if I can get the engagement lower.
Any idea why everyone says the Evom kit is an 8 hour job? Does not look 8 hours to me, but what do I know.
The evoms kit is every bit of four hours on a lift. If working on the ground I can see it take longer. Getting the stock slave out is a pain because of the size once you have the new slave in its easy. Then the clutch master and spring which the spring can also be a pain if you have never done one.
To anyone that does this job get a pressure bleeder this system can be a nightmare to bleed since there is so much line from the master to the slave.
#30
Racer
I felt the same when I got my car 2.5 years ago.
I too am running a sachs clutch and it took a while for me to get used to. That being said, I STILL find it impossible to use from a stand-still and while in sport mode
I'm gonna replace the slave when I pull the motor for some other stuff
I too am running a sachs clutch and it took a while for me to get used to. That being said, I STILL find it impossible to use from a stand-still and while in sport mode
I'm gonna replace the slave when I pull the motor for some other stuff