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#1
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Underdrive Pulleys Sheared Anyone's Crank?
I am looking into pulleys, but I had a 3KGT-VR-4 and the unorthodox racing pulley ended up shearing my crank. Was a fun rebuild, but Im not in the mood to redo that operation anytime soon?
How are the underdrive pulleys working out so far? Anyone had any problems? |
#2
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No one has reported any problems yet, but those stock pulleys have a damper on them for a reason as you found with your 3000GT. Flat sixes are not immune to torsional harmonics. There is a very interesting report on the internet of a guy with a Corvair motor that measured torsional strains with/without a harmonic damper.
People have reported that the pulleys do noticably improve acceleration on the SVX.
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#3
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I think i will wait, and see if anyone snaps anything then i might test the waters with one.....
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#4
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underdrive
42500 miles with a 4.25 inch underdrive pulley with no problems, so far. ( stock is 5.25 )
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#5
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i probably put a good couple thousand miles on a lightweight underdrive pulley before my tranny went south.. no problems, but i didn't notice very much of a performance difference either..
-adam |
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