Originally posted by 3.0L SVT E0:
1) Why would an automatic car be protected from 'whip' more? The auto car CAN rev just as high as the manual car can. Like I said in the post
2) I think that is one clue to why the DMD is there mainly for NVH. If it was there to save the motor from shaking it's self to pieces then why isn't it there on every duratech motor?
3) I think that placing the DMD only on cars that are available with manual transmissions doesn't make sense to me. The ATX car can and will rev just as high as a manual car if the pedal is pushed to the floor. This is why I am of the opinion that the DMD is for dealing with NVH issues, not the cure all for internal vibration problems.
Roger
Just to keep the fun comming..
1) It can...only if you shift it manually. A Taurus shifts automatically at 5800 RPM. Even with pedal to the metal. Even with the electric overdrive switched off. MPV, IIRC about 6K shifts. How many Taurus, MPV owners will manually shift?? I bet few have EVER visted 7K, and those that do...rarely. SVT visits 7K daily..
Oh, and also what was mentioned about the tourque converter..had not thought of that.
2) Lets flip this around...why does not the Jag have a DMD if it IS for NVH primarily. What Duratec needs better NVH control than the flagship luxury car?
3) see 1 & 2
wattspr..
It really is good that your car/engine has had no problems with a fair amount of ontrack. I do think these cars are tougher than sometimes given credit. But when talking about crank whip remember that spun bearings still happens to the minority of cars. Maybe 10%, maybe 20%, maybe even 30%...but even that leaves 70% that are fine. This is why anacdotal reports are of little use in figuring out whats going on...if you mentioned 1000 guys had a similar story as yours, it would be useful. However, several persons that race their cars HAVE had failure/spunbearings..1 even failed twice after adding a baffeled oil pan. And 58K is still pretty low mileage...an engine should last at least 3x that. And I am curious why you added the damper...you are a racer and you added an extra pound to the crank...was this really for smoothness or were you worried just a bit??
