Please explain this picture
I also agree with keeping the stock pulley. It's not just a pulley - it's a damper. The underdrive pulley is NOT a damper, just a pulley. The damper dampens torsional vibration, that is, when each cylinder fires bending the crank throw forward and then having to whip it backwards when combustion is complete. The damper reduces the magnitude of the torsional deflections, helping to prevent the crank (and bearings) from self-destructing.
For four years you've been running it that way, and that's fine that you haven't had any problems (that you're aware of anyway). But overall it's generally a bad idea to remove it, so I would not go around suggesting it to other people.
For four years you've been running it that way, and that's fine that you haven't had any problems (that you're aware of anyway). But overall it's generally a bad idea to remove it, so I would not go around suggesting it to other people.
I'm with Wrd and SS RRR..
I'd go as far to say that you gain a MAX of 4 whp from the U/D pulley if that... If you stick with it, then leave the stock dampener on there..
I'm not as smart as most of these guys but from my understanding it is necessary because it keeps "engine vibrations" down which would cause excessive wear on bearings, valves, valve springs, timing chain, etc... Which in turn would cause you to loose power, and as stated engine longevity..
Wrd did a good job elaborating the necessity of the stock dampener..
LOL at first when I saw the picture I thought you were asking about the oil leak... I was about to start saying ' looks like the WP or opti drive seal '
I'd go as far to say that you gain a MAX of 4 whp from the U/D pulley if that... If you stick with it, then leave the stock dampener on there..
I'm not as smart as most of these guys but from my understanding it is necessary because it keeps "engine vibrations" down which would cause excessive wear on bearings, valves, valve springs, timing chain, etc... Which in turn would cause you to loose power, and as stated engine longevity..
Wrd did a good job elaborating the necessity of the stock dampener..
LOL at first when I saw the picture I thought you were asking about the oil leak... I was about to start saying ' looks like the WP or opti drive seal '
Interesting. Mine ******* died six months after putting the pulley on. When the U/D pulley was first introduced there were all kinds of complaints from people of their batteries ******* dying. March did not make an O/D pulley, until they started receiving complaints about batteries ******* dying.
It does depend on your driving habits. If you drive in stop/go conditions where there is not enough voltage to properly charge the battery then the battery is going to eventually ******* die. M6 cars did not have a battery ******* dying problem as much as the autos had a battery ******* dying problem.
It does depend on your driving habits. If you drive in stop/go conditions where there is not enough voltage to properly charge the battery then the battery is going to eventually ******* die. M6 cars did not have a battery ******* dying problem as much as the autos had a battery ******* dying problem.
Thread Starter
On The Tree
Joined: Feb 2012
Posts: 120
Likes: 0
From: Fort Riley, Kansas
I have an M6, and the volts dropping all the time drive me nuts. 5 days a week I take the car out two times on a 4 mile round trip stop and go journey, I'm lucky if I hit 45 mph. I will return the car to the stock pully and give away the under drive pully.... I just have no use for it. As far as an elbow goes, I have one on the way, hopefully it'll be on the car next week... then I start cleaning.
I appreciate everyones input, even if not everyone agrees.
I appreciate everyones input, even if not everyone agrees.
Thread Starter
On The Tree
Joined: Feb 2012
Posts: 120
Likes: 0
From: Fort Riley, Kansas
TECH Fanatic
Joined: Feb 2006
Posts: 1,025
Likes: 1
From: CT/NJ
Interesting. Mine ******* died six months after putting the pulley on. When the U/D pulley was first introduced there were all kinds of complaints from people of their batteries ******* dying. March did not make an O/D pulley, until they started receiving complaints about batteries ******* dying.
It does depend on your driving habits. If you drive in stop/go conditions where there is not enough voltage to properly charge the battery then the battery is going to eventually ******* die. M6 cars did not have a battery ******* dying problem as much as the autos had a battery ******* dying problem.
It does depend on your driving habits. If you drive in stop/go conditions where there is not enough voltage to properly charge the battery then the battery is going to eventually ******* die. M6 cars did not have a battery ******* dying problem as much as the autos had a battery ******* dying problem.
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Joined: Dec 2008
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From: Little Rock, AR
Dude this is totally false. Like I said, Ive been running a small underdrive pulley and never changed my alternator pulley and I have NEVER EVER EVER had a problem. Your battery is not going to ******* die. Take off the damn stock pulley and run just the underdrive, and it will be FINE.
IMHO, removing the damper is also a way bad idea. With it gone, what is controlling harmonics? Sure, the engine will run and every engine is a little different, but removing this protection is really not something you want to do.
4 years on a walmart battery and no problems here, maybe my motor is just balanced perfectly with no harmonic vibrations. Or my ported MAF combined with my underdrive pulley is acting as a harmonic balancer. 
Take off the stock pulley, Ive run a lightweight aluminum underdrive pulley for the past 4 years and not had a single problem, and I spin my motor to 6100 rpm. Ditch the stocker, use the underdrive, it revs noticeably faster without that giant hunk of metal hanging off the front.
The harmonics are generated by the firing of the cylinders and has nothing to do with how well your motor is balanced. Your motor does fire. Right?
Wow just wow. One guy thinks because his car is still running that you don't need a harmonic Balancer and it wont cause any issues removing it. I feel sorry for the main bearings in your motor.
For factory designed longevity of a motor, sure, use a harmonic balancer, and also don't rev past redline, or dotted red line in our case. But for that extra few hp and quicker revs, plus a couple tenths off a track, running just a pulley and pulling 500rpm past redline is worth it, to me anyways. Others have their own opinions. I also am an M6 which either is racing or cruising at 70 down the highway, not an auto in stop and go traffic with the headlights on and a full stereo system, which could be why the charging issue people claim never affected me.
Yea, it was a joke...
For factory designed longevity of a motor, sure, use a harmonic balancer, and also don't rev past redline, or dotted red line in our case. But for that extra few hp and quicker revs, plus a couple tenths off a track, running just a pulley and pulling 500rpm past redline is worth it, to me anyways. Others have their own opinions. I also am an M6 which either is racing or cruising at 70 down the highway, not an auto in stop and go traffic with the headlights on and a full stereo system, which could be why the charging issue people claim never affected me.
For factory designed longevity of a motor, sure, use a harmonic balancer, and also don't rev past redline, or dotted red line in our case. But for that extra few hp and quicker revs, plus a couple tenths off a track, running just a pulley and pulling 500rpm past redline is worth it, to me anyways. Others have their own opinions. I also am an M6 which either is racing or cruising at 70 down the highway, not an auto in stop and go traffic with the headlights on and a full stereo system, which could be why the charging issue people claim never affected me.
I would not recommend any car without the dampner
I did not see that episode, but, from your description, I WOULD assume that, someone losing a balancer during burnout, IS someone that half-assed a motor build. Clearly, it came to light down the track later, with the same **** poor judgement to continue with the pass after the balancer was gone.
This would be a COMPLETELY different issue than what Matt is dealing with. I DO NOT agree with what Matt is doing to his own motor
