URD 5vz Idler Pulley for TRD Supercharger Dynamic Tensioner
URD 5vz Idler Pulley for TRD Supercharger Dynamic Tensioner

Our Price: $99.95

Part Number: 1016171

URD 5vz Idler Pulley for TRD Supercharger Dynamic Tensioner

Many of our customers use their trucks with the TRD Supercharger for off road desert racing. We were asked by them to come up with a solution for the chronic problem of the supercharger belts breaking in this racing venue.

URD investigated this problem and what they discovered why the belts where breaking at an alarming rate. What is happening is that when the rear tires leave the dirt at full throttle they spin up rapidly and so does the engine, then when the tires make contact again the suddenly slow down.

When the tires are in the air the supercharger is sped up to a very high RPM, much faster than the engine's speed. The supercharger rotors have a lot of mass and store energy like a flywheel. When the engine suddenly slows down the supercharger is still spinning very fast. This pulls the slack side of the supercharger belt tight and pulls the spring loaded tensioner out to its full extension. The next thing that happens is that the engine speeds up again and speeds up the supercharger and the spring loaded tensioner cannot react fast enough to keep tension on the slack side of the supercharger belt. This allows the belt to lose contact with the tensioner pulley and the belt rolls off the side of the pulley and gets trapped between the pulley and the tensioner arm and locks the belt. Engine torque now snaps the belt and boost as well as the race is lost.

The key to fixing this problem was to keep the belt from rolling off the side of the tensioner pulley. The simple fix was to develop a pulley with tall ears on it to prevent the belt from rolling off the side it and getting locked.

The URD Tensioner pulley for the TRD 5VZ-FE Supercharger system has tall ears on each side to keep the belt on the pulley in racing conditions. The URD pulley solves the chronic belt breakage problem in off road racing.

You do not have to be an off road racer to install this upgraded pulley. Most off our customers that install them don't even drive their trucks off road.

The pulley is finished in URD red anodizing to match the other SuperGrip performance pulleys that are available and looks very nice under your hood.

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Average Customer Review: 5 of 5 Total Reviews: 2 Write a review.

  0 of 0 people found the following review helpful:
URD 7th injector kit with 2.2 Supercharger pulley December 1, 2016
Reviewer: Robert West from Salado, TX United States  
Th e  seventh injector kit is awesome really improved the performance of my 4 Runner the 2.2 high performance supercharger pulley and the high-performance idler pulley really improve the performance of my vehicle
The guys at LCE performance are awesome, there's never a question that's too stupid and they always return phone calls and get back with you.
Tony was awesome throughout this whole process.
I purchased the supercharger for the 3.4 V6 5VZ in April of 2016 and just completed the seventh injector kit this November 2016.
My 4 Runner is a Totally different vehicle now. Thanks for all the technical assistance and a special thanks to Tony for his awesome assistance and undying patience.  These guys treat you the best and really know customer service after the sale! Thanks again LCE Performance!
R. West, Salado, Texas

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  0 of 0 people found the following review helpful:
one of those form and function parts June 10, 2015
Reviewer: James Lucas from Battle Ground, WA United States  
Besides the wait to receive the part (almost 3 weeks, and was partly my fault for ordering on a holiday weekend) this part works like it should. And looks great too! Definitely one of those form and function parts.

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