onefstm

For those of you that have done this upgrade, do you feel that it was a big benefit? This would especially apply to owners of standard GT3's with the heavier stock flywheel. My car has 28k miles, about 6 track days so far, and no signs of slipping. However, the motor is coming out for coolant line pinning and I am considering doing a clutch at the same time. The car gets about 5k street miles per year and 5-6 track weekends. I believe that the cost is around $3,000 plus labor.

Have a happy 4th everyone!

Thanks,

Jeremy

mrrammstein

Not to highjack the thread, but the Porsche service guy said the clutch for the 3.8RS and the 4.0RS are in fact the same? Is this correct? I was thinking of doing the 4.0 Clutch as well but was told there is no difference.

TRAKCAR

Only when it breaks cause 4.0 stronger. Not sure if there are differences gt3 vs RS I don't think so.

No, 4.0 part#'s supersede 3.8 and are better.

Atlas911TT

Is the clutch pedal feel improved with the 4.0? My 3.8RS is very firm and was wondering if the change over to 4.0 would soften the pedal?

TRAKCAR

No difference in feel or performance just more durable for track.

mrrammstein

Thank you!

sixtosune

isn't there something about the single-mass flywheel of the RS 4.0 clutch Vs the regular GT3 clutch in that the engine revs / drops revs faster? and the characteristic of the chatter at idle?

F1CrazyDriver

I did the lwfw on my 996 turbo. Everyone whom did it stated it helped with heal+toe, rev's faster. I never had an issue with heal+toe on dual mass. I did it for the "revving faster" ...well it was bogus to my ****. Decided not to do lwfw when gt3 had engine out.

p.s. gt3rs 4.0, clutch engagement/shifting is phenomenal.

bw12GT3.2

The gt3 should have always have had a single mass flywheel i put the compleate 4.0rs clutch /flywheel assembly in car the engine revs noticeably faster the transmission imput shaft rattles a littel bit at idle i would do it again no question the 3.8rs and the 4.0rs clutch /pressure plate are not the same the 4.0 is bult slightly differnt and is more durable

bmwtye

Actually there is a different feel, and not just between going to this clutch, but between the pedal feel amongst cars with the 4.0 clutch flywheel.

My 2007 GT3 oem clutch pedal is much firmer then the 3 different cars ive driven with 4.0 clutch/flywheel setups. All those cars the pedal was significantly softer. When I drove the Sharkwerks 4.1 gt3 (which was also much softer pedal feel that i accidentally put it to the floor with ease the first time i pressed it), i was talking to Alex about this and he even confirmed that with all the 4.0 RS clutch/flywheels they have installed, some have been really firm pedal feel, others have been much softer pedal feel. And there is no way to tell what you are going to get until its all installed.

I prefer a much firmer pedal feel so after my experiences with this its made me hesitant to switch over to this setup.

911GT3

I have a 2010 .2 non-RS and did this mod. I noticed an improved engine rev response both up and down--makes sense with less inertia. However, I wouldn't do it unless you track your car a lot. Increased noise, loss of a touch of smoothness and cost make it a track mod only in my opinion. No gain for street, maybe some loss.

onefstm

Thanks for all the input guys. After reading the different posts, I may wait until I actually need a clutch before doing the mod.

ScottArizona

I'm perplexed by the negative sentiments posted about this mod. I plan to install the 4.0 clutch package early next year based on my experience installing an rs clutch and flywheel kit in my old 996 gt3. That was the single best mod I did to that car and it transformed the way it drove. Felt like I picked up 30 hp and engine really felt snappy and energetic. I don't know why the 997 would not respond in the same way so I'm doing it for sure! It was not s subtle difference in my opinion.

m42racer

I'm told the Dual mass Flywheel weighs 55 lbs and the clutch pack another 15 lbs or so. That has to make a difference if the Single mass Flywheel weighs alot less. You have to acccelerate 65-70 lbs everytime you push down on the pedal.

I added the dampener only 5 lbs and have zero issues.

onefstm

Ok, I have done more reading on the 996 GT3 forum. People do seem to love this mod over there. These guys also talk about using the 4.0 clutch; however, they mention using the 964 or 996 Cup flywheel, which is 6lbs. Is there some reason that this setup will not work on 997's?

Also, the kit that they link on Suncoast is $1,625 instead of $2,450. I will call them Monday to inquire about the actual part number differences.

http://www.suncoastparts.com/product...de=996gt3trans