Quote:
Originally Posted by stephen wilson
You could also use a larger pulley to selectively underdrive one particular accessory, without changing the others.
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That is true. If u want my honest opinion, the value of these pulleys are that they under drive the water pump, the alt, and the PS pump. The AC is being under driven as well, but ur controlling that load with the panel on the dash in accordance with ur own preference. So if u drive it slower with an UD pulley but ur still too hot (in a convertible..
), u'll just turn it up anyways so the AC is a none issue in my opinion. That just leaves the other 3 loads.
Its been proven that the other 3 loads are being over driven from the factory which is why ud pulleys work.
In my case, because I'm removing two of those loads and effectively giving their work to the alt, I may just find that it needs to be driven closer to the factory speed. I seriously doubt it but maybe.
The other potential benefit of the ud pulley is that they could be made lighter than the factory pulley and therefore give less rotational mass/inertia for the engine to have to overcome to rev. However, from what I've seen, all these UD pulleys are actually slightly heavier then stock. If I were to cut a custom pulley, that's one improvement I would def pursue - weight - even if it meant going to a different material such as titanium.