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Would this work on a Gen 4? Do you have any estimate cost wise? I'm definitely interested.
 

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Didn't you already post a question like this twice before and never got on it?
 

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Discussion Starter #5
yes I did patrick, see what happened was I have my buddy Dave K., he was trying to get a cnc and machiney set-up and it took a while, I thought it was all ready to go when I posted, but it took few months, but now for sure this time, its ready and yep all we need is a stock crank pulley from any vulcan, it doesnt matter it will work for any of them! If I remember I think dave said the price was 75 or 80 shipped for the pulley, dont quote me, but I emailed him to let him know whats going on.....if that "someone" can get a pulley for me, u can guarantee less than 50 percent of the price of the udp for you helping us out! Whoever is interested u can email me privately to ask questions too, it dont matter thanks for your interes!!
 

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Discussion Starter #8
I have, no go, same with dave no go.....so yeah I have a goal in my mind, this is gonna get done somehow, if any of you have time and really want a pulley for cheap could ya check out some junkyards for me, I will send u money for the pulley I really dont care, just to make this happens thanks again!!!
 

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Discussion Starter #11
nO NO NO EVERYTHING IS STILL ON FOR THE PRODUCTION....a udp will relieve some of the "work" your belt makes, therefore itll add anywhere from 3-5 hp(depending on the mods you have) and 5-10 lbs of torque, it all has factors of course, it actually is prettty easy to install, if u look under your motor(by the passanger front wheel) u will see a set of pulleys and the very bottom one is the crank pulley, so basically u need to do it remove the belt, un-bolt the crank pulleu bolt the new one on and put a smaller belt on and VIOLA, more power from your vulcan....
 
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This was done in the past (rangers?) and IIRC there was an issue with using a reduction that was too much. What is the reduction (% of underdrive) on these pulleys?
 

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Discussion Starter #13
I remember dave telling me that there shouldnt be any issues at all with the reduction, yeah the ranger pulleys are the rwd ones and vulcan fwd, Ill ask, for some reason 30 percent is on my head, I am prollly wroNG iLL ASK, good question doc!
 

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This is starting to become a Macgyver episode.... someone going to make it out of paperclips and oily rags... :nothingtoadd:
 

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Underdrive pulleys are not going to make much difference. The only thing the UDP's deliver is 3-5 hp at peak rpm. You wouldn't feel the difference at all. Most (if not all) will experience charging problems. Some would experience cooling problems. If you are a racer and expect to keep the rpms up for continuous periods of time, then these would make sense. Just my 2 cents.
 

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Discussion Starter #18
Well my budy Dave has been making these for the rangers for years now, he has never had any complaints, the reason they do have charging and cooling probs is becuz come manufacturers makes them with such a high percent of reduction it tends to mess things up- <_<
 

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If just installing a smaller pully increases HP and TQ by 5-10, then why wouldn't ford put on a smaller pully right in the factory?
 
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