I have the unorthodox pulley on (I know there's a lot of debate about it). It's been on the car for close to 7 months now. Also I think the stock weighs about 5lbs or so, pretty heavy piece.
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99 prelude sold
2002 WRX (mine)
2002 IS 300 5spd w/ NAV (hers)
You should see the crank bearings I have after using a solid crank pulley after 10k miles. Destroyed the #1 and #2 bearings, slightly galled the crank, and ruined the oil pump. That's enough for me to not recommend using one.
Dude, dont replace it! I used to preach all of my mechanical vibrations knowledge from mech engineering and the labs we did to prove how parts break/wear excessivly with harmonic frequencies and what can be done to combat moving parts from reaching resonating frequencies, like adding mass...and noone, especially on SHO the great idiots page, save a few engineers on the board believed me. Well, then Billy did a tear down of his engine and there was the proof in an engine for all the nonbelievers. Its just not something you want to do. It costs money to put a harmonic dampener in there, its not there for looks...
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If you only knew the power of the Lude...
'94 Porsche 968 - National PCA HPDE Instructor
'98 Red Base Prelude - 02 & 03 DSP Champion - Sold
"Straights are for fast cars. Turns are for fast drivers." - SCCA Solo2
Originally posted by 98Luder 71Dsp what ever happened to the Fisher damperner deal?
Did they end up making one for the h22a?
Well I'm not Billy but I am in on the deal and I did just speak with them a few weeks back. It seems that they have been dragging their feet on making the H22 damper because there is only one guy who really wants to get it done. I was told that they would be done sometime soon, possibly within the next month. I'm not holding me breath though.
Gabe
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03 Black/Black S2000 #2512
04 Eternal Blue Pearl Accord EX-L w/Navi
Originally posted by 71dsp Yeah, in the next month, whatever....they have Jackson Racingitis.
Better right than fast, though, but they shouldn't make promises they can't keep.
Yeah my discussion with them the other day was interesting. I just called to update my info for the buy and I talked to the guy we're going through (can't remember his name) and he seemed a little agitated with the progress they're making. He's been telling them that they already have orders so they better get it in gear but to no avail I guess.
Gabe
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03 Black/Black S2000 #2512
04 Eternal Blue Pearl Accord EX-L w/Navi
icic... i guess maybe the unorthodox crank pulley isn't such a good idea...
is there a safe way to get the unorthodox to work, like getting it balanced or somehow getting a harmonic dampener on it...??
how about if i cut the stock crank pulley and get it balanced? is this a bad idea?
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-Mike-
01 Type SH
15.360@90.86mph at Cali Speedway E-Mail Setups
Originally posted by darklude icic... i guess maybe the unorthodox crank pulley isn't such a good idea...
is there a safe way to get the unorthodox to work, like getting it balanced or somehow getting a harmonic dampener on it...??
how about if i cut the stock crank pulley and get it balanced? is this a bad idea?
There's no way to make the UR pulley into a harmonic balancer, as it is a solid piece of aluminum. It's already balanced from the factory (it would be very difficult to machine it out of balance).
I suppose you could try balancing the stock pulley, but unless you're balancing the entire engine, there's probably no need to.
Originally posted by darklude icic... i guess maybe the unorthodox crank pulley isn't such a good idea...
is there a safe way to get the unorthodox to work, like getting it balanced or somehow getting a harmonic dampener on it...??
how about if i cut the stock crank pulley and get it balanced? is this a bad idea?
It already is ballanced from the factory. This means when they turn it on the lathe, they make sure that the chuck is spinning with minimal vibration and variance to make it out of round. Then they spin the pully to test it and make corrections accordingly. This is not the solution though. What goes into mechanical vibration and harmonics is extensive. All moving parts in a mechanical system make their own frequency. The faster they move, the more they approach their first harmonic or resonate frequency. I dont have the exact formula with me, but the resonate frequency is equal to the square root of the dampening rate or spring rate divided by the mass of the system. When you add mass to the system, the higher that frequency is and faster it can go. Resonation is bad. We had a lab in school where we blew apart a shaft cycle testing it at its resonating frequency. Pretty cool in the lab, not cool in the car... So the mass of the pulley and increasing the dampening will make everything in the engine last a lot longer. It is how it is designed. It has been proven over years of many engines, including Billy's engine.
__________________
If you only knew the power of the Lude...
'94 Porsche 968 - National PCA HPDE Instructor
'98 Red Base Prelude - 02 & 03 DSP Champion - Sold
"Straights are for fast cars. Turns are for fast drivers." - SCCA Solo2
I dont think there is much debate about it anymore when the "proof" everyone was wanting who didnt study it came out with Billy's engine...
__________________
If you only knew the power of the Lude...
'94 Porsche 968 - National PCA HPDE Instructor
'98 Red Base Prelude - 02 & 03 DSP Champion - Sold
"Straights are for fast cars. Turns are for fast drivers." - SCCA Solo2
Originally posted by 71dsp Whatever Warren. My bearings and oil pump were enough convincing for me. Do you have any evidence that proves otherwise?
Billy, my motor did not look like yours when it came apart. The crank pulley had over 60K miles of use on that motor. It did have a spun bearing, but that was from low oil pressure.
BTW, I could care less about this topic anymore, I am really just giving you a hard time, lighten up.
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So the mass of the pulley and increasing the dampening will make everything in the engine last a lot longer. It is how it is designed. It has been proven over years of many engines, including Billy's engine.
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