ROAD/RACE-We have underdrive pulleys
Oct 8, 2005, 08:30 AM
#32
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THey have been shipping regularly now. If 10 days go by email cory@roadracemotorsports.com for tracking info. Don't call in for that.
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Oct 8, 2005, 09:37 AM
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Originally Posted by ROCK
That can be true but in most instances, the pulley on a stock motors cost manufacterers a $2 dollars. THey are not balanced unto themselves because they are cast pieces. Our pulley are CNCed and completely balanced units.
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Dont get me wrong... I would love to pick one of these up for the hp, but it has seemed that everytime someone asks a concerning question about it, the person selling the product basically says not to worry about it, or "so far so good". I guess with so little time and miles on this product, we wont know any more for a year or two of driving. But damn... it is so tempting....
Oct 9, 2005, 08:21 PM
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Not trying to skirt question. Most rotating components are balanced unto themselves so as long as new component is balanced it should be fine or within accepted percentage on balance. Everyone including our turbo RA is running fine. I would not sell it if I did not want to run it on my own car!
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Oct 9, 2005, 10:10 PM
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Originally Posted by ROCK
Not trying to skirt question. Most rotating components are balanced unto themselves so as long as new component is balanced it should be fine or within accepted percentage on balance. Everyone including our turbo RA is running fine. I would not sell it if I did not want to run it on my own car!
ROAD/RACE
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If I am way out to lunch on these points, please say so, and I will happily order the pully, it sounds like a great low cost hp gainer. I just want the trueth on these products known. If this is a car you plan on keeping as a daily driver for years to come, like my wife and I are, we have to be careful on to what cost to the motor will certain parts effect over time.
Oct 10, 2005, 07:55 AM
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^ What he said. A 6whp gain wouldn't be worth the trouble, although I did speak to my friend who is currently at UW-Madison studying mechanical engineering, and has help build a formula mazda race car and he said something similar to what ROCK said.
"Removing the dampener on the crank pulley will not reduce the life span of the engine that greatly, maybe acouple thousand miles off its lifespan, because you are taking off an unbalanced, higher weight part and replacing it with a light weight, balanced part."
"Removing the dampener on the crank pulley will not reduce the life span of the engine that greatly, maybe acouple thousand miles off its lifespan, because you are taking off an unbalanced, higher weight part and replacing it with a light weight, balanced part."
Oct 10, 2005, 10:50 AM
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[QUOTE=r3z0nate]^ What he said. A 6whp gain wouldn't be worth the trouble, although I did speak to my friend who is currently at UW-Madison studying mechanical engineering, and has help build a formula mazda race car and he said something similar to what ROCK said.
"Removing the dampener on the crank pulley will not reduce the life span of the engine that greatly, maybe acouple thousand miles off its lifespan, because you are taking off an unbalanced, higher weight part and replacing it with a light weight, balanced part."[/QUOTE]
Interesting. It would be nice to see some actual facts on this, rather then just hear-say. If its true about only slightly limiting the life span by that little bit, I forsee a new pully in my future. However, I still have trouble with removing a part off the motor, that is intented to prevent damage to the internals, until I see some definate proof. It looks as though I am not the only one with these concerns.
"Removing the dampener on the crank pulley will not reduce the life span of the engine that greatly, maybe acouple thousand miles off its lifespan, because you are taking off an unbalanced, higher weight part and replacing it with a light weight, balanced part."[/QUOTE]
Interesting. It would be nice to see some actual facts on this, rather then just hear-say. If its true about only slightly limiting the life span by that little bit, I forsee a new pully in my future. However, I still have trouble with removing a part off the motor, that is intented to prevent damage to the internals, until I see some definate proof. It looks as though I am not the only one with these concerns.
Oct 10, 2005, 10:54 AM
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Originally Posted by wrecked
Interesting. It would be nice to see some actual facts on this, rather then just hear-say. If its true about only slightly limiting the life span by that little bit, I forsee a new pully in my future. However, I still have trouble with removing a part off the motor, that is intented to prevent damage to the internals, until I see some definate proof. It looks as though I am not the only one with these concerns.
Oct 10, 2005, 03:25 PM
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Originally Posted by NonEvo
I totally understand where you are coming from because i had the same questions. The thing you must realize is that any change you make to your car can void warranty and possibly cause premature death to your car/engine. Adding a piggyback could cause electrical errors in your engine, CAI could possibly get water in the engine. There is a chance with every part you buy. This is were you have to decide whether you are willing to take that small % chance of something bad happening to get that 5-10hp.
Oct 10, 2005, 06:33 PM
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i spoke with a buddy of mine that has been a mechanic for pro stock dragster for 20+ years, and asked him about the negs to these underdrive pulleys. He did not even think the vibration would be too big of a deal if the pulleys are good quality and balanced as RRM says. The issue he said you would have to worry about is the obvious. Since the belt is moving much faster, so are the rest of the pulleys, which could cause excess wear on your all your other pulleys(altenater, AC, power steering). It could cause there bearings to wear out faster. He said it could change your timing, but i dont believe that is a factor with out engines. He said that if you are worried about it and still have your warranty then he would not advise you to get the pulleys. But if you dont have to worry about Mitsu voiding your warranty(meaning you dont have one) and you want the power then go for it.
Oct 10, 2005, 06:41 PM
#41
Originally Posted by NonEvo
The issue he said you would have to worry about is the obvious. Since the belt is moving much faster, so are the rest of the pulleys, which could cause excess wear on your all your other pulleys(altenater, AC, power steering). It could cause there bearings to wear out faster.
Oct 10, 2005, 08:14 PM
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Originally Posted by NonEvo
i spoke with a buddy of mine that has been a mechanic for pro stock dragster for 20+ years, and asked him about the negs to these underdrive pulleys. He did not even think the vibration would be too big of a deal if the pulleys are good quality and balanced as RRM says. The issue he said you would have to worry about is the obvious. Since the belt is moving much faster, so are the rest of the pulleys, which could cause excess wear on your all your other pulleys(altenater, AC, power steering). It could cause there bearings to wear out faster. He said it could change your timing, but i dont believe that is a factor with out engines. He said that if you are worried about it and still have your warranty then he would not advise you to get the pulleys. But if you dont have to worry about Mitsu voiding your warranty(meaning you dont have one) and you want the power then go for it.
It sounds like your draging friend is speaking more of the pulley itself causing vibrations. This is not going to be a problem because they are balanced. The issue is that the vibration dampener that is removed takes out the vibrations in the crankshaft itself. Loosing that piece causes the crank to get a little more vibration travelling through it, thus causing the bearings and races to handle more vibrations then they were intended to = lowered lifespan. How much more seems to be unclear. This is the info that I would like to see.
Oct 11, 2005, 04:09 AM
#43
Just a quick one here recieved the pulley in todays mail and I must say I am very impressed with the quality of the product it is finished of beautifully all I need now is a car for it to fit onto... but the time for delivery was 4 days very fast considering that it came from the U.S to rural Western Australia well done guys will be telling all about the product... than again I might not... not till I win a few races and lay down some nice track times....
As far as what it will do to the motor and other parts as far as wear goes I think that it is not very fair to ask someone if they can tell you what will happen - I think if anyone had a crystal ball and could see into the future they would not be using it to tell you what car parts will work they would be using it for a lottery win.... the good thing with drag racing and other motorsport events race teams modify nearly every component in there cars and this is one part that frequently gets modified, because it provides a safe and reliable way of increasing power and when they fail they look at other ways of improving it - balance, size and weight. But if you are really that worried about what it may do to the car then don't do it look for other ways of making power or you can put the pulley on and make sure that the car is regularly serviced and use quality oils and lubrcants check on a regular basis how the other pullys are holding up... other than that it is a gamble but I see it as a viable one
sorry for rant but just my 2 cents
As far as what it will do to the motor and other parts as far as wear goes I think that it is not very fair to ask someone if they can tell you what will happen - I think if anyone had a crystal ball and could see into the future they would not be using it to tell you what car parts will work they would be using it for a lottery win.... the good thing with drag racing and other motorsport events race teams modify nearly every component in there cars and this is one part that frequently gets modified, because it provides a safe and reliable way of increasing power and when they fail they look at other ways of improving it - balance, size and weight. But if you are really that worried about what it may do to the car then don't do it look for other ways of making power or you can put the pulley on and make sure that the car is regularly serviced and use quality oils and lubrcants check on a regular basis how the other pullys are holding up... other than that it is a gamble but I see it as a viable one
sorry for rant but just my 2 cents
