Re: @nd LET 185mm pulley exploded in traffic at 25MPH
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Originally Posted by
waldig
Yes all pulley parts WERE aluminum and overall lighter than the stock steel pulley. I have no idea of the failure cause, there was no issues until I heard this noise while putting along in a line of traffic. I did not even go to auto-crossing this year so no high rpm operation for over 12 months.
I WENT WITH the 65mm pulley after consulting Rob at NEEDSWINGS, and he said that the 65mm pulley had better reliability than the 62mm pulley. It was on the strength of his advise that I decided not to go with the more aggressive pulley. I dont want to limit my driving range away from my house for fear that Ill need to tow it home, reliability is very high on my list of needs.
If you look back over my designs of the: oil separator, pulley saver, the super cooler, the dual cai and crossover manifold products in concert with Rob, concept, more power with no added stress. (Lower temp and pressure on the supercharger for instance).
Yes you should be aware of the car and monitor little issues and noises to be aware of its overall condition.
Enjoy, Woody
I was not referring to all after market items, I have the oil separator, SAI, and the coolant separation kit on my car. I was referring to the items that are stressed or cause extra stress, these would be the pulleys and some of the DIY pulley mods.
Practicaly everything breaks in the end for one reason or the other, the aim of the design should be to max out the time before it does fail. Ideally this time should be greater than the assembly in which it sits. You do not want a $1 part wrecking a $100 assembly.
The reason many of these parts were made of aluminum was because it was cheaper and easier to machine, but the reason given was because it was lighter, that was BS. Aluminum does not take stresses in these parts too well, threads become loose and stresses cause fatigue failures.
Last edited by onehundred80; Oct 23, 2018 at 10:10 AM.