Originally posted by SVTCuervo:
Ok guys, I'm been thinking about this for a while know and don't know what to do. I've been told by many people that the extra weight on the DMD will cause the car to loose power 
This is definately something i don't want. So I figured I'd go with a Unorthodox Racing Pulley since the gains are quiet nice 
. And I've been told by many performance gooroos that I have no fear of Harmonic whateva killing my engine because its only happens at tiny parts in the curve and they won't affect my engine. If anyone TRUELY knows what they are talking about, please reply. How many Tour's have gone bad due to Harmonic's any way?
You need to do some searching of your own. If these crank problems are mere anomolies...why did Ford make them a stock item on all Mondeos? Further..it has been shown over and over on this board by the number of crank/rod failures that the engine has some problem. Further further...the "power loss" of a mere 1lb on the crank is minimal...easily offset by a Fridenza or lightened flywheel...and is much cheaper than a low-end rebuild. Also remember...rotational weight may "rob" power at the begining of spin-up, but it stores that energy in the form of rotational mass (remember the law of physics...an object in motion will stay in motion until another force is applied to it...my paraphrase)...making the transition of off-to-on throttle smoother.
Ducati had the same problem. People were lightening their cranks..confusing the lazy power delivery of the twin with a shreiking 4 cylinder. The cranks were running into harmonic imbalance..and causing failures.
I look at the DMD the same way I look at Mobil-1...not required, but cheap insurance for engine longevity.
Also look here...the 2nd post...I know its about flywheels but the inertia idea is the same:
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=tranny&Number=363212&page=0&view=collapsed&sb=5&o=7&fpart=1
This contains some of the idea I was trying to express above...
Last edited by mcgainer; 07/30/03 12:36 PM.
