Underdrive pulley install?
#1
UA6mt NBP
Thread Starter
![Exclamation](https://acurazine.com/forums/images/icons/icon4.gif)
i just purchased the undersize pulley and im looking to possibly do it myself and i have to 6mt and want to see if anybody was able to just pop it in 6th gear and have someone hold the brakes to see if thats worked and how hard it is to change out the timing belt with the smaller pulley
#2
AZ Track Whore
iTrader: (4)
It's doable in gear and on the brakes but it's a bitch even then.
Timing belt with a small pulley? Why would it be any different? Yes people have trouble getting the aluminum pulley off sometimes without damaging it but aside from that there's no reason to worry about it at all.
Timing belt with a small pulley? Why would it be any different? Yes people have trouble getting the aluminum pulley off sometimes without damaging it but aside from that there's no reason to worry about it at all.
#5
Drifting
iTrader: (1)
and im 99% sure the blip start doesnt work on 07-08 since they fully start once you turn the key regardless if u hold it or not
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#10
UA6mt NBP
Thread Starter
200 bucks damn i was reading other forums wheres shops charge people like 60 bucks to do the job, id go have it done but i like doing my own work and learning to do the things i havent done before
#12
Safety Car
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why do you guys have to buy the key? autozone, pepboys, and orailey (kragen) all loan them out.. just get the key. Have to long breaker bar. one to hold the pulley and another one with a steel pipe over it to give it more tq. PB blast that b*tch and let it rip. Just hope it doesn't rip out your motor mount cuz that what happen to one of my friends.
#17
Safety Car
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I ono my friend Push down and his mount more torn out. I think they were pretty F up to begin with. We added a 5 foot pole to the breaker bar and 2 people pushed on it. lol you can see the motor move up and were like FML.
#19
UA6mt NBP
Thread Starter
just got my pulley installed today for $70 cant beat that but the mechanic said something to me about down sizing the power steering pulley so the steering is tighter, any thoughts on that if there even is a pulley for that...from what ive been reading the underdrive is the only aftermarket pulley avail?
#21
Go Pats!
Hope this help
![Smile](https://acurazine.com/forums/images/smilies/smile.gif)
#23
07 NBP TL
iTrader: (1)
undersize pulley will underdrive your accessories by 10-15% where as the stock size pulley will not, however the undersize pulley give u more HP but no by alot like 2-3 difference between the two. If u r planning to put a big stereo system and play it very loud or SC ur car dont get the undersize as it will not charge ur battery enough to run with such high watt requirements.
Hope this help![Smile](https://acurazine.com/forums/images/smilies/smile.gif)
Hope this help
![Smile](https://acurazine.com/forums/images/smilies/smile.gif)
#24
Go Pats!
yes, both will increase ur HP since i think the OEM in ur car weight around 9lbs to the stock size pulley with just 1lbs. Like i said both will give u HP but the undersize will give u an extra 2-3Hp compare to the stocksize pulley
#28
Suzuka Master
^ there is plenty of access to it
#29
Three Wheelin'
I used an impact and just because i wanted to i heated it up with some MAP gas before i hit it and it came off like nothing. Everyone over thinks this! It took less then a half hour. Motor mount dmg and timing belt?!?! Really? If you dont have an impact do it right and get the tool or go to a shop to get it done, sould take .3 in time so you do the math... thats alot less then messing up you crap when you have no idea what your doing. Sorry it thats a bit harsh but you cant find an easier mod.
#31
UA6mt NBP
Thread Starter
i paid $65 cheap and its out of your hands left the shop put it on the lift and use their tools instead of you trying to do the different methods and taking away your whole day
#32
Old MT TL
iTrader: (4)
i kno bump, but i had to say this for people thinking to do this
i did this all myself its not that much of a big deal to take off. if u dont want to mess up the engine mount then lift the engine with a jack take off the mount then do the work..duh. u will need the $25 pulley tool 100% tho. add two breaker bars and a pipe at the end of one with the bolt or some other type of leverage cuz its a pita.. good luck
i did this all myself its not that much of a big deal to take off. if u dont want to mess up the engine mount then lift the engine with a jack take off the mount then do the work..duh. u will need the $25 pulley tool 100% tho. add two breaker bars and a pipe at the end of one with the bolt or some other type of leverage cuz its a pita.. good luck
#34
Race Director
iTrader: (1)
^Why? Do the aluminum lightweight pulley but why do the under drive just for those measly little hps? Why worry about that?
The pulley is worth it imho, the UD pulley is not. :/
The pulley is worth it imho, the UD pulley is not. :/
#36
Race Director
iTrader: (1)
An "underdrive" crank pulley is a pulley with a smaller diameter. The result is that it drives the accessories more slowly, and with greater mechanical leverage. It's like pedaling a bicycle up a hill with the smallest sprocket engaged on the crank. The goal of the underdrive pulley is to reduce drag from the accessories on the motor. Of course, if the accessories are turning more slowly, they will also be that much less effective, but life is all about compromises.
Does an underdrive pulley really add horsepower? The pulley manufacturers say they do, and we've seen tests in magazines that seemed to indicate signficant gains. But you could get the same sort of gains during a drag race WITHOUT an underdrive pulley by removing the belt from your alternator. (The motor can run solely off the battery for a short time.)
The other benefit of aftermarket pulleys is to reduce rotating mass. Here the simple aluminum crank pulley has a big advantage over the heavy stock pulley, but there's a reason it's so much lighter: It's missing the harmonic dampener. The reduction in rotating mass may be worth a couple of horsepower. But removing the dampener seems like a bad idea to us.
Does an underdrive pulley really add horsepower? The pulley manufacturers say they do, and we've seen tests in magazines that seemed to indicate signficant gains. But you could get the same sort of gains during a drag race WITHOUT an underdrive pulley by removing the belt from your alternator. (The motor can run solely off the battery for a short time.)
The other benefit of aftermarket pulleys is to reduce rotating mass. Here the simple aluminum crank pulley has a big advantage over the heavy stock pulley, but there's a reason it's so much lighter: It's missing the harmonic dampener. The reduction in rotating mass may be worth a couple of horsepower. But removing the dampener seems like a bad idea to us.
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rockstar143 (04-24-2012)
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#38
BANNED
iTrader: (33)
you're just freeing up HP by having lighter, and in most cases, less restrictive parts on your car.
#39
Moderator
Chapter Leader (South Florida Region)
Chapter Leader (South Florida Region)
iTrader: (6)
No sir, I'm definitely adding horsepower. But yeah, I agree, all of YOU are just freeing it up. ![Smile](https://acurazine.com/forums/images/smilies/smile.gif)
Thanks for the explanation, I'm seriously considering this badboy, but yeah, I'd run the stock diameter one. Hmmm...I don't have lightweight wheels either!
![Smile](https://acurazine.com/forums/images/smilies/smile.gif)
Thanks for the explanation, I'm seriously considering this badboy, but yeah, I'd run the stock diameter one. Hmmm...I don't have lightweight wheels either!
![Frown](https://acurazine.com/forums/images/smilies/frown.gif)
#40
Race Director
iTrader: (1)
I can say from experience that both light weight wheels and light weight pulleys can def make a difference.
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Inaccurate (04-25-2012)