One important factor that people don't consider when bypassing their smog pump is that water pump and alternator bearings will go out quicker! The reason is that the more pulleys you have the longer your bearings will last (a stock 5.0 has seven pulleys/bearings. The more pulleys you have, the more the radial loading is reduced on each individual pulley. This fact is just simple automotive engineering! If you want your water pump and alternator bearings to last when you remove your smog pump, install a smog pump delete idler pulley! The company I work with manufactures a P/S and A/C delete kit for 5.0 engines that utilizes a idler pulley that mounts in the P/S bracket. They seem to do an excellent job.
One important factor that people don't consider when bypassing their smog pump is that water pump and alternator bearings will go out quicker! The reason is that the more pulleys you have the longer your bearings will last (a stock 5.0 has seven pulleys/bearings. The more pulleys you have, the more the radial loading is reduced on each individual pulley. This fact is just simple automotive engineering! If you want your water pump and alternator bearings to last when you remove your smog pump, install a smog pump delete idler pulley! The company I work with manufactures a P/S and A/C delete kit for 5.0 engines that utilizes a idler pulley that mounts in the P/S bracket. They seem to do an excellent job.
radial bearing loading is different when in dynamic state
An NTN bearing engineer who's company makes pulley bearings for the automotive industry has told me......
1. when an engine is in static state (not running) the bearing radial load is distributed evenly over the seven pulleys! This load is determined by the belt tensioner pressure applied to the serpentine belt.
2. when in a dynamic or "running state" there is suddenly a pulling side and a slack side to the drive pulley (harmonic balancer). What actually happens is that the individual load on each pulley is now shifted somewhat (no longer evenly distributed as in static state). The P/S and A/C pulleys because they are immediately on the pulling side of the drive pulley (harmonic balancer), will now have a greater loading than when they were in a static state! The pulleys close to the slack side such as W/P and S/P will have less of a loading when in dynamic state! This fact is why you should keep your W/P pulley on the slack side of the drive pulley (as the factory belt routing dictates). I have seen belt routing with W/P pulley immediately on pull side of drive pulley which puts greater radial loading on W/P bearings (especially at high RPMs). By installing a S/P delete pulley you can keep W/P pulley immediately on slack side of drive pulley and W/P bearings will last longer!!! key buzz words are..... "bearing radial load shifing when going from static to dynamic state"!
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