JasonAndreas

thanks!
The 993TT and the 964 3.6TT also use the same pressure plate.

Cupcar

FWIW, The 964.116.028.53 part number pressure plate was also used by Porsche in their 964 3.8 RSR

roberga

That is why it is going in. The springs are stronger and will add durability. I could have used the stock plate but the guys at the local shops recomend the complete conversion. Knowing how we use the cars. Lots of Autocrossing and track .

gtdrei

That's the right one if you track or autoX. Oddly, it's also a lot smoother on the street. Smelly for about 1K miles or so, but so good. Best clutch I've ever had in a 911.

Enjoy
Robin

roberga

robin: Barrier is putting it in tuesday. Chris Powell got the parts next dat delirery. It would take Porsche 10 days.

gtdrei

It's nice to have a motorsport-aware dealer !

Cupcar

I did the LWF installation virtual weight and horsepower savings for a GT3 using the equation in the link I gave above.
Values used:
Tire diameter= 335mm
Flywheel diameter=282 mm
Flywheel weight difference= 15.4 pounds
Gears 1 to 6 = 3.82/2.15/1.52/1.21/1.0/.85
R&P= 3.44
Weight to HP= 8.8 pounds per horsepower

Results:
Virtual weight saved in pounds per gear 1 to 6= 277/98/57/42/33/28
Virtual HP gained per gear 1 to 6= 31.4/11.1/6.5/4.7/3.8/3.2

This meets the seat of the pants test that most of the perceived gain is in first gear.

roberga

That is just what I was looking for. This is an autocross up grade for me. At our events the Porsches never get our of second.

This will also be impactfull leaving bus stops and here in Seattle t3B

viperbob

The assumptions made are a little simplistic for the moment of inertia in their equation. The mass lost is not spread evenly over the diameter of the flywheel, but is in fact lost almost entirely towards the outside of the flywheel. Yes it is difficult to characterize in a simple equation, but it will mean that the effect is much more pronounced than the outcome of these equations.

Cupcar

Yeah I know, but I looked at the LW flywheel and the mass is distributed fairly uniformly for it, it's essentially a disk except for an area under about 1/3 the contact surface, the DMF is another story so the comparison loses something there.

One would have to integrate the radial mass change of the flywheels to get the actual polar moment differences.

My buttometer matches the equations though, it feels about like a 277 pound passenger got out of the car in first but the launch is a little touchier due to the lost stored energy.

I think a lot of the beauty of the conversion is the throttle response improvement, and the reliability of the LWF, not just acceleration.

viperbob

We are saying the same thing Cupcar. It is a great upgrade that really turns on the cars....

PogueMoHone

So in summary are these the parts?

Flywheel 964 102 239 31
Starter ring 964 114 143 31
Pressure plate 964.116.028.53

Anything else needed?

Cupcar

You can use your original pressure plate if in good condition, otherwise replace it with the part number you give or the original part number.

You need the sprung center driven disc 996.116.015.30, the longer thowout bearing guide tube 950.116.813.30 and the throwout bearing with longer operating flanges 944.116.080.01

Plus the other parts you list and you should be good to go.

roberga

931.102.111.00 pilot bearing
996.116.015.32 clutch plate
944.116.080.01 release bering
928.102.151.01 flywheel bolts (9)
N0147153 clutch bolts (9)