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Underdrive pulley
Posted: Fri May 06, 2011 7:54 am
by screaming4snow
Are they really worth it?
Can you notice any change in the accesories?
What about any hp gain ?
Re: Underdrive pulley
Posted: Fri May 06, 2011 5:02 pm
by Macky21
I have the CFM pulley kit and they are considerably lighter than the stock pulleys. Since I installed them, I've noticed better pickup, better gas mileage and they're red and I can see them when I turn my wheels all the way to the left. If you get some, I'd recommend replacing your serpentine belt, tensioner and idler pulleys. Mine slips a lot because I'm missing the shield and I haven't put in my serpentine stuff yet.
Re: Underdrive pulley
Posted: Fri May 06, 2011 5:29 pm
by ThatOneBigKid
I put mine on last summer. I instantly noticed that the motor no longer lags when I have the A/C on. I could also feel a difference in pick up but haven't noticed a difference in MPG.
I would defiantly buy them again
Re: Underdrive pulley
Posted: Fri May 06, 2011 11:46 pm
by bflesher
I have em on and I figure it's worth a couple of hp and maybe 1mpg at most. They work better on v8's or v6's since they have more power to unlock so to speak. Worth it, yep.
Re: Underdrive pulley
Posted: Mon Jun 13, 2011 12:20 am
by focinite
beware . there is a reasone for the big chunk of steel. imbalance will cut the life of your bearings short
Re: Underdrive pulley
Posted: Mon Jun 13, 2011 7:45 pm
by PBZX3
^^ Is this from experience or conjecture?
Re: Underdrive pulley
Posted: Wed Jun 15, 2011 12:18 am
by focinite
i have removed a handful off my customers cars due to nvh . its a free world do what you will,as for me i dont think an extra 5 horse is worth the bearing damage or the loss of low rpm charging. if you want real power you can feel a blue or red aluminum pulley is no match for higher compression or displacement. and here is where you a fifty gazzillion people tell me that they and there mom all have udps on there ish. thats great , over a decade of experiance and a crotch load of shcooling and cirtifications tell me that if the crank has a balanced or wieght dampened pulley on it from the factory ,its there for a reasone. if it where not needed dont you think the bean counters a ford would have gone the cheap route and put the flimsy pulley on.
