Quote:
Originally Posted by csoehn
PP isnt underdrive, but ya you are right they are just alumunim chunks that are machined
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I thought they made an underdrive pulley... Maybe the last iteration wasn't, but I'm pretty sure they had a lightweight underdrive pulley before.
Quote:
Originally Posted by csoehn
well ive never heard of this before so it sounds kinda scary cause you do sound like you know what ur talking about, maybe i'll throw on my stocker and put my $100 into something else
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It shouldn't be scary.
It's a trade-off.
The questions are:
(1) Is the trade of reliability for power worth it ?
(2) Is the price worth it for the unit supplied.
Everyone will have to answer number one for themselves. I'm trying to provide the complete story. If people want to do it, by all means, as mentioned before, the most gains (rather lack of losses, since it doesn't increase power) will be noticed if you already have a lightweight flywheel.
Think about that one, the whole goal of reducing spinning mass is allow the engine to do more "useful" (useful = propulsive) work. This is a good, and worthy goal. As a percentage of the total spinning mass, going from the stock pulley to the lightweight pulley, is a much much smaller effect than going from the stock flywheel to the lightweight flywheel. You will barely notice the effect of a lightweight pulley, *unless* you already have put a lightweight flywheel on. It is still there, and it will allow your engine to change RPMS faster than before, but the effect will be much less than if you have a lightweight flywheel. Add a light weight flywheel, and then the the difference of a lightweight pulley is a more noticable percentage of the total spinnig mass.
I'm not sure if I am making myself clear or not. Perhaps that was a bit dense.
The point is, I'm not saying a lightweight pulley is evil or terrible, or that it won't do what Jake (or anyone else claims), it will in fact do those things. It will also shorten the life of the main bearings, along with all other attached components, because it will not be absorbing vibrations, like the stock pulley was. The question is, which is more important, a little bit of performance, or the total lifetime of your engine.
I encourage people who are regularly racing their engines, or who are using their car infrequently (ie, not a daily driver, nor a grocery getter), to consider this modification. It's relatively cheap, and in combination with a lightweight flywheel, very responsive.
The people who should not be considering this, are the 16-21 year old inexperienced drivers, who only have one car --- their MX6, and they have to drive to school, or drive to work in it. That is who I am trying to warn, and the people who ought be spending $100 on keeping their car running well, rather than putting a shiny piece of aluminum on it, when the rest of the engine is covered in oil.