Is 4.0 clutch flywheel kits different from mine on 997.1 GT3 RS?
09-01-2022, 11:41 PM
#16
Yes it will work on a G50 box. I use the 997RSR 5.5" carbon Tillton. Works great. The 997Cup uses a Sachs 5.5" with metal discs instead of Carbon. I would not use any of the 5.5" clutches on a street car. It's a race clutch.
Last edited by powdrhound; 09-01-2022 at 11:43 PM.
04-07-2023, 12:59 PM
#18
Burning Brakes
Thread Starter
CAN ANYONE COMMENT?? Much appreciated
04-07-2023, 09:12 PM
#19
Racer
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Brian Himmelman (04-07-2023)
04-08-2023, 12:23 AM
#20
Rennlist Member
Not sure if anyone can add to this … 3rd owner of my 2007 997.1 GT3 RS, former owners lots of track use PCA instructors … my car used to have the flywheel chatter at idle and cool sounds … I now have installed from Sharkwerks the 4.0RS clutch and flywheel kit … no more chatter or sounds … clutch pedal is lighter and smooth (before was heavy) … was hoping this upgrade would be more raw and challenging but seems more refined (not what I wanted)
CAN ANYONE COMMENT?? Much appreciated
CAN ANYONE COMMENT?? Much appreciated
I cannot speak for the lack of chatter, but I will say mines pretty quiet until it’s fully up to temp.
Also, the pedal feel and throw changed for me when I did all the 4.0 stuff as well. I felt the same as you initially and sort of missed the heavy clutch. But after some time in the car and driving other GT3s- it’s not only much smoother and more comfortable- but also I’ve found it gives you more feedback than the super heavy clutch.
04-08-2023, 08:36 AM
#21
Rennlist Member
I have a .1RS with stock parts. My friend also has .1RS and recently did the 4.0 clutch/flywheel kit.
His clutch feels lighter ....I like the stiffer feel of my clutch. As far as revving quicker ...I really didn't notice much of a difference. I won't be changing mine.
His clutch feels lighter ....I like the stiffer feel of my clutch. As far as revving quicker ...I really didn't notice much of a difference. I won't be changing mine.
09-21-2024, 11:44 AM
#22
Burning Brakes
Thread Starter
The 4.0 LWFW (.81) is 2 lbs lighter than the 3.8 LWFW (.31). It's the same part but the 4.0 version has more material machined from the perimeter giving at a 5mm narrower friction surface resulting in less MOI. The 4.0 .81 LWFW is the same as a 996Cup LWFW. The 4.0 pressure plate is bolted, not riveted. That's a definite upgrade as it gives it more burst resistance at high rpms. The 4.0 sprung clutch disc is a slightly different design and has replaced the 3.8 part.
If the engine is out, I would swap it out personally but that's an individual decision. I would also install the 7.2GT3 crank pulley.
If the engine is out, I would swap it out personally but that's an individual decision. I would also install the 7.2GT3 crank pulley.
what does “more burst resistance at high rpms” mean? Much appreciated
09-21-2024, 03:02 PM
#23
09-22-2024, 04:43 AM
#24
I had the riveted pressureplate.
I was experiencing that after 2-3 laps on nordschliefe it was "Hard" to get gear in, in the higher rpms.
let car cool down and no problem for 2-3 laps.
i changed to 4.0 flywheel and bolted pressure plate and now no problem at all.
I had read here on the forum that someone expienced the same. Super nice forum for picking up info for solutions.
997.1 gt3
I was experiencing that after 2-3 laps on nordschliefe it was "Hard" to get gear in, in the higher rpms.
let car cool down and no problem for 2-3 laps.
i changed to 4.0 flywheel and bolted pressure plate and now no problem at all.
I had read here on the forum that someone expienced the same. Super nice forum for picking up info for solutions.
997.1 gt3
09-23-2024, 06:57 AM
#25
Addict
Rennlist Member
Rennlist Member
I had the riveted pressureplate.
I was experiencing that after 2-3 laps on nordschliefe it was "Hard" to get gear in, in the higher rpms.
let car cool down and no problem for 2-3 laps.
i changed to 4.0 flywheel and bolted pressure plate and now no problem at all.
I had read here on the forum that someone expienced the same. Super nice forum for picking up info for solutions.
997.1 gt3
I was experiencing that after 2-3 laps on nordschliefe it was "Hard" to get gear in, in the higher rpms.
let car cool down and no problem for 2-3 laps.
i changed to 4.0 flywheel and bolted pressure plate and now no problem at all.
I had read here on the forum that someone expienced the same. Super nice forum for picking up info for solutions.
997.1 gt3
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changster123 (09-23-2024)