Underdrive Pulley
(4" Single Groove)
Underdrive pulleys are an excellent addition for just about any high RPM performance application. The lightweight of these billet aluminum pulleys will reduce the drag on your engine, while the underdrive design will allow your engine to turn your front belt accessories with less effort. All this means you gain performance and a cleaner looking engine compartment. Another added benefit is the built-in degree wheel on the front of the pulley that will allow you to dial in your top dead center point much more accurately. The stock harmonic damper is steel, weighs in at 5 pounds and over 6" in diameter we shave off a full 2" in diameter and cut the weight down to half a pound by using American T-6 6061 billet aluminum.
High RPM race engines often overdrive the water pump making the engine's cooling system inefficient. These Crankshaft Power Pulleys reduce water pump and alternator RPM providing better cooling and less power loss. Each 4" diameter Crankshaft Power Pulley is made from 6061 T-6 aluminum and is then hard anodized for extra strength with laser-etched markings for long life.
Recommended Additional Parts:
- For Crankshaft Oil Seal, see Part #: 1015042.
- Should be used with our Adjustable Timing Tag, see Part #: 1016117.
There are three pulleys to choose from:
- Single groove: would be a race application only running an alternator. With no power steering or other belt-driven accessories.
- Double groove would be used with an alternator and A/C or custom belt accessory and no power steering. For double groove applications, see Part #: 1016104.
- Triple-groove pulley would be used for running alternator A/C and power steering. For triple groove applications, see Part #: 1016105.
- For Complete Underdrive Kits, see Part #:'s 1016120, 1016123 and 1016124.
NOTES: Not recommended for street driven vehicles or rock crawlers.
| Note: Images are for illustration purposes only. Images may not represent the product listed. Please contact customer service with any questions or concerns: 1-928-505-2501. |
- 1975-1980 20R 2.2L Engines
- 1981-1995 22R 2.4L Engines
- 1983-1995 22RE 2.4L Engines
- 1985-1988 22RET 2.4L Engines
To open a printable PDF version of this instruction CLICK HERE
LC Engineering strongly recommends that you review a factory service manual, our call our tech line 928-855-6341 if you have questions during installation.
LC Engineering's 4 inch underdrive crankshaft pulley will install just like the stock Pulley. What will need to be done is the timing tag on the oil pump will need to be trimmed off for added belt clearance. That's why it is recommend to run the LCE adjustable timing tag, Part# 1016117. The front crankshaft oil pump seal rides on the pulley. So it is also recommended to install a new crankshaft oil pump seal when installing the new pulley. Apply motor oil on the seal and seal surface when reinstalling the new pulley. Be sure the crankshaft key is in place and in good condition when reinstalling. Torque front bolt to 80 Ft Lbs.
4 Reviews Hide Reviews Show Reviews
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Underdrive Pulley
Have yet to test but fit and finish is superb
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Underdrive pulley
Not yet installed, though exactly as described and a quality looking product. The degree markings will be beneficial for various future tunings.
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Great Product
This was a great product. Nice quality. Easy to install.
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Quick shipping
Quick shipping and always high quality products. The best for toyota.
