Mother

On a stock clutch I do not think it matters which way the friction disc goes on but, on yours it may? With the jbracing clutch I was reading the the clutch pedal did need to be limited on the travel. It's the big red lettering at bottom of second page.

http://www.jbracing.com/tech%20guide...RSCHE%206B.pdf

PS I have to replace my master clutch cylinder and was wondering if you or anyone else knows if the "push rod" on cylinder is adjustable?

SSI Performance

The clutch master cylinder is not adjustable. Be very careful with the push lock line fittings they brake very easy so take your time and do not force it apart.

On the 996 track car we install an adjustable pedal stop to keep the driver from over extending the clutch and also you could load the end of the crankshaft, this would put a lot of pressure on the thrust bearing and may case damage to the engine.

1. Remove the left cowl cover.

2. You will see a black line going throw the fire wall, this is the supply line coming from the brake master. take a small screw drive and gently pop the safety cover off the fitting, you will see a red ring on the compression fitting push it in toward the fitting then slide line off. Be patient with it could take a couple time to get it.

3. Just under the black supply line is a blue line this line goes to the slave cylinder. You will see the tail of the clutch master cylinder sticking out of the fire wall remove the blue metal clip then pull the line out.

4. the fun part if your a big guy like me its no fun, flip your self up side down head first under the dash feet up on the seat and remove the two 10mm bolts and clip from clutch pedal.

SSI Performance

For those of you doing track events with you 996 do not fill the engine oil to the max line only fill it to the minim line. We are seeing allot of these car going into a long sweeping left turn and the oil stacks then get pulled into the intake system through the oil separator. This will hydrolock your engine and brake the connecting rods then its time for new engine.

Mfletch

Mother, you are a life saver. I was seriously stressed out about having the clutch installed backwards. That link explains the problem. Thank you. I'm sorry, I have never removed the clutch master cylinder rod.

SSI, thanks for the information. Do you sell a clutch pedal stop or have advice on how to make one?

Jake or SSI, are you guys working on a different crankshaft dampener to offset the single mass flywheel? Thanks

If anybody has advice on making or buying a quality adjustable clutch pedal stop, I would appreciate it.

Mother

Mfletch anytime maybe jbracing has a idea for adjustment hardware etc.

SSI (Thanks) great feedback for my Master Cylinder change.

Jake Raby

Yes, we have been working for 8 months on a harmonic damper for the single mass arrangements, BUT it'll never absorb the harmonics as well as the dual mass flywheel..

It will help, but nothing will be as good as a dynamically balanced engine outfitted with a LWFW, but you can't buy that from Porsche, and never will...

SSI Performance

Hey Mark,

Yes we make them I will post some pic of it.

I would have to agree with Jake there is no dampener that is going to take care of a rotating assembly that is16 grams out of balance. Porsche has added a front harmonic balance pulley on the 997 engines I have not done any testing yet with using it on a 996, I think Jake has done testing on the 997 damper. even if you use the 997 front damper pulley it would not offset the pore balance of these engines. I would say if you are looking to get long life out of your motor change the flywheel or balance the engine.

Sloan

Mfletch

Sloan, thanks for the information. If you have a quality clutch pedal stop that will work, I will buy it.

ArneeA

I'm interested about the clutch stop also.

Jake Raby

The 997 damper will work, with a couple of mods.. They are more expensive and less effective than the damper we have been working on for several months. They can also only be bought in the standard diameter, where the units we like to use are under driven and only 4" diameter to keep the power steering pump alive on the track and free up a tad bit of power.

Imbalance can only be corrected with a dynamic balancing procedure applied to the entire rotating/reciprocating mass. This can only be done with the entire engine disassembled.

Mfletch

I made a temporary clutch stop out of the rubber end on a crutch. It works. When SSI gets one fabricated, I will buy it. It is a necessity with my combination. I went to a couple car shows this weekend and got to put a few miles on the Porsche. My A/C system is now working. The car runs fantastic. I love the instant accleration and the additional responsiveness. Double clutching is fun. I almost never notice additional noise due to the LWFW. I still highly recommend this mod.

Mother

Glad it's working well car looks great and nice that you have some car shows to go to. It's boring here in Phoenix although I did have a all women vintage vette club pass me by the other day but there ages matched there cars.

Marlon

Hmmmmmm - the very best kind....

Mfletch

Mother their cars are, at most, in their late 40's....there are definately some hot soccer moms that age...they need love too.

ivangene

this thread went from interesting to INTERESTING !