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#16
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Re: Crankshaft Pulley
I'm pretty sure it will Earl as i've had my eye on this for a while.
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Seth 94' Barcelona Red w/ Tricoat black 2-tone AWD Ls -Sold Mods:AWD conversion/4.44 swap by Budfreak, Custom red interior lights, Custom Satin black dash, Power mode switch, Cold air intake, Permecool tranny filter,Sony xplode 10" sub, Sony xplode 1000w amp, Blitz in-line driver, DDM Tuning 6000k HID's, New paint job/body work by me, 97' Grill, QC shift kit, 17'' MB Motoring rims, 15&20 min mod, front & rear urethane swaybar bushings, Custom fiberglass sub box, Custom red led a/c control unit, perrin lightweight crank pulley, Black wrinkle finish powdercoated intake manifold w/ clear hoses , 02' outback heated/power black leather seats Soon to come:Fiberglass hood, upholster ALL suede to black leather Past subies: 92' Pearl White/black top LS-L-SOLD 96' Legacy Outback-TOTALED 99' Legacy Outback Limited 30th anniversary edition-TOTALED 98' Forester L -Totaled Other toys: 99' Forester S -WRX brake upgrade, soon an 04 wrx motor swap 06' B9 Tribeca-Stock 1982' Yamaha xj650 Maxim Mods: work in progress |
#17
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Re: Crankshaft Pulley
Any of the pulleys meant for the 4-cylinders will fit our cars.
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Chris 92 Ebony Mica LS-L "A Rolling Restoration": 223,250 KM - Sleeping 2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos 2008 Subaru Legacy Spec B - Diamond Grey Metallic - Sold 2020 Ram 1500 Longhorn - Red Pearl |
#18
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Re: Crankshaft Pulley
My SVX has had an Agency pulley on it for nicely over a year now. It spent time on a WRX before I got it for cheap.
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Disclaimer: The above post is on the internet. |
#19
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Re: Crankshaft Pulley
If so, can it be predicted as to exactly when the crank might fracture?
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#20
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Re: Crankshaft Pulley
No, the pulley has no specific weight. It is a damper, a soft drive which irons out or absorbs any vibrations/peeks in the rotational speed of the crank, and the parasitic loads driven by the pulley are very much part of the equation. There is no movement of the frequency, the object is to eliminate same.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#21
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Re: Crankshaft Pulley
Quote:
From Wikipedia A harmonic balancer (also called crank pulley damper, crankshaft damper, torsional damper, or vibration damper) is a device connected to the crankshaft of an engine to reduce torsional vibration. Every time the cylinders fire, torque is imparted to the crankshaft. The crankshaft deflects under this torque, which sets up vibrations when the torque is released. At certain engine speeds the torques imparted by the cylinders are in synch with the vibrations in the crankshaft, which results in a phenomenon called resonance. This resonance causes stress beyond what the crankshaft can withstand, resulting in crankshaft failure. To prevent this vibration, a harmonic balancer is attached to the front part of the crankshaft. The damper is composed of two elements: a mass and an energy dissipating element. The mass resists the acceleration of the vibration and the energy dissipating (rubber/clutch/fluid) element absorbs the vibrations. Additionally the energy transferred from the piston to the crankshaft can induce as much as 2 degree's of twist in the crankshaft, which has many follow-on effects on all engine elements that require adequate timing such as valve opening, cam timing, ignition timing etc. Over time, the energy dissipating (rubber/clutch/fluid) element can deteriorate from age, heat, cold, or exposure to oil or chemicals. Unless rebuilt or replaced, this can cause the crankshaft to develop cracks, resulting in crankshaft failure. Performance enthusiasts have been known to remove harmonic balancers, usually when the balancer is attached to the crank pulley, deciding that they aren't necessary and their mass reduces the performance of the engine. However, this is unproven and potentially very risky because the danger of damage to the engine from the vibrations the damper is intended to prevent is too high. Certain cars, however, do not come equipped with an external balancer on the crank pulley, and as such, can have the pulley replaced with a performance oriented product which counter-act these resonance frequencies.
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If it ain't broken it, doesn't have enough features!!! '92 SVX LSL '03 4Runner '96 FZJ80 Landcruiser '90 Mercedes 300E |
#22
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Re: Crankshaft Pulley
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The original pulley certainly has some weight, but no specific weight in respect of a design requirement. The weight is dictated by mechanical considerations relative to the damping mechanism. Wikipedia confirms my statement in all respects, but does not cover aspects of the driven load, this being in their description, a secondary item. Why do you emphasise this point, which does not cover the SVX? --- “Certain cars, however, do not come equipped with an external balancer (integral balancer?) on the crank pulley, and as such, can have the pulley replaced with a performance oriented product which counter-act these resonance frequencies.” What is your point? The original pulley certainly has some weight but no specific weight in respect of a design requirement. The weight is dictated by mechanical considerations relative to the damping mechanism. Wikipedia confirms my statement in all respects but does not cover aspects of the driven load, this being in their instance a secondary item. Why do you emphasise this point, which does not cover the SVX? --- “Certain cars, however, do not come equipped with an external (integral?) balancer (Damper?) on the crank pulley, and as such, can have the pulley replaced with a performance oriented product which counter-act these resonance frequencies.” (N.B. A plain pulley, within itself, can in no way counteract resonant frequencies.)
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! Last edited by Trevor; 07-26-2009 at 06:50 PM. Reason: Typo |
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