|
Removing a factory component to replace it with some very different item. Burden of proof is on you to prove that it doesn't cause a problem. The thing about this is that its a long term effect.. KInd of like smoking cigarettes. You are going to die whether or not you smoke, but cigs will definately shorten your lifespan. 20K miles isn't enough mileage to test this. I'm looking more at 50-80K miles to really get a good idea. And the problem with that is you would have to prove that it failed from something else to give credit to the UD pulley. The more power a Z makes, the more stress on the bearings for two reasons. 1)Higher cylinder pressures=more pushing force on crank=more wear on bearings and 2)more power to crank produces more twisting = higher amplitude vibrations which further stress the bearings. Since there are two factors stressing the bearings in two different ways, its hard to say if it which one is more responsible. Only real way to do it would be to take two brand new TT engines, jack up the boost to 16psi, put an UD pulley on one of them and see which one fails first. And you would have to do this with a large pool of engines. This makes proving it either way pretty cost prohibitive. Solution, leave good enough alone. I'm sure that Nissan engineers took everything into consideration with the VG and the harmonic dampener. They know the crank will twist a certain amount, the know the natural frequency of the crank, and they are going to do what is necessary to prolong the life of the engine. By leaving it on there while jacking up the boost, you only have one factor wearing the bearings, not two.
: it's the American Way :)
: I know of many many guys with a pulley and they have had no problems. There are no cases to my knowledge that have been positively linked to a pulley causing an engine or bearing failure. Show me the truth...show me the way...theory is bullshit....show me in the real world....
My CarPuter Headquarters:
[ ashleypowers.com ]
agpowers@bellsouth.net |
