RS 4.0 Clutch/Flywheel - Worthwhile upgrade for GT3?
07-10-2014, 12:21 PM
#16
I had the single mass LWFW installed in my RSA, and the result was positive - increased idle vibration and noise acknowledged but no issue on track. While the track benefits would also apply to the GT3, I am hesitant to make the swap at this time. Of the owners I know, the RS's have been more failure prone, and the biggest difference between the RS and GT3 is the solid flywheel.
Harmonic balancing issue as the root cause? Who knows, but sounds plausible. Some recommend using a smaller diameter pulley to reduce parasitic losses and reduce wear on the auxiliary systems, but apparently the custom ATI harmonic balancing unit being designed for the GT3 is actually a larger diameter so it would seem to create other drawbacks. Perhaps they will be able to make it the same size.
There was one particular issue with my RSA LWFW that I have not seen discussed: the tendency for the engine to stall when abruptly letting off the throttle. The fix was to have a custom chip made that modified the fuel delivery tables and increased the idle speed. Has this been an issue for those that have changed their GT3's to the LWFW?
The 4.0 clutch system uses all different part numbers compared to stock. Is the 4.0 pressure plate dimensionally the same as the stock pressure plate? If it fits, the more robust design would seem to make it desirable, even with the stock clutch and flywheel.
Harmonic balancing issue as the root cause? Who knows, but sounds plausible. Some recommend using a smaller diameter pulley to reduce parasitic losses and reduce wear on the auxiliary systems, but apparently the custom ATI harmonic balancing unit being designed for the GT3 is actually a larger diameter so it would seem to create other drawbacks. Perhaps they will be able to make it the same size.
There was one particular issue with my RSA LWFW that I have not seen discussed: the tendency for the engine to stall when abruptly letting off the throttle. The fix was to have a custom chip made that modified the fuel delivery tables and increased the idle speed. Has this been an issue for those that have changed their GT3's to the LWFW?
The 4.0 clutch system uses all different part numbers compared to stock. Is the 4.0 pressure plate dimensionally the same as the stock pressure plate? If it fits, the more robust design would seem to make it desirable, even with the stock clutch and flywheel.
07-10-2014, 01:53 PM
#17
Rennlist Member
07-10-2014, 11:55 PM
#18
For now, I am going to stick with the stock clutch and instead spend the money on TPC's upcoming spring, toe arm, and upper strut mount package. I feel like this will actually translate into faster track times.
07-11-2014, 12:53 PM
#19
Rennlist Member
Great advice on the diff. I did a Guards a few months back and absolutely love the difference on the track.
For now, I am going to stick with the stock clutch and instead spend the money on TPC's upcoming spring, toe arm, and upper strut mount package. I feel like this will actually translate into faster track times.
For now, I am going to stick with the stock clutch and instead spend the money on TPC's upcoming spring, toe arm, and upper strut mount package. I feel like this will actually translate into faster track times.
07-11-2014, 12:54 PM
#20
Rennlist Member
I had the single mass LWFW installed in my RSA, and the result was positive - increased idle vibration and noise acknowledged but no issue on track. While the track benefits would also apply to the GT3, I am hesitant to make the swap at this time. Of the owners I know, the RS's have been more failure prone, and the biggest difference between the RS and GT3 is the solid flywheel.
Harmonic balancing issue as the root cause? Who knows, but sounds plausible. Some recommend using a smaller diameter pulley to reduce parasitic losses and reduce wear on the auxiliary systems, but apparently the custom ATI harmonic balancing unit being designed for the GT3 is actually a larger diameter so it would seem to create other drawbacks. Perhaps they will be able to make it the same size.
There was one particular issue with my RSA LWFW that I have not seen discussed: the tendency for the engine to stall when abruptly letting off the throttle. The fix was to have a custom chip made that modified the fuel delivery tables and increased the idle speed. Has this been an issue for those that have changed their GT3's to the LWFW?
The 4.0 clutch system uses all different part numbers compared to stock. Is the 4.0 pressure plate dimensionally the same as the stock pressure plate? If it fits, the more robust design would seem to make it desirable, even with the stock clutch and flywheel.
Harmonic balancing issue as the root cause? Who knows, but sounds plausible. Some recommend using a smaller diameter pulley to reduce parasitic losses and reduce wear on the auxiliary systems, but apparently the custom ATI harmonic balancing unit being designed for the GT3 is actually a larger diameter so it would seem to create other drawbacks. Perhaps they will be able to make it the same size.
There was one particular issue with my RSA LWFW that I have not seen discussed: the tendency for the engine to stall when abruptly letting off the throttle. The fix was to have a custom chip made that modified the fuel delivery tables and increased the idle speed. Has this been an issue for those that have changed their GT3's to the LWFW?
The 4.0 clutch system uses all different part numbers compared to stock. Is the 4.0 pressure plate dimensionally the same as the stock pressure plate? If it fits, the more robust design would seem to make it desirable, even with the stock clutch and flywheel.
